A method and system for full-range time-varying phase real-time estimation based on weak measurement technology

Abstract

The application provides a full-range time-varying phase real-time estimation method based on a weak measurement technology, comprising the following steps: S1, a quantum weak measurement optical platform for time-varying phase real-time estimation is built, an unknown external signal is introduced in the interaction process to generate a time-varying phase; S2, the quantum weak measurement optical platform is used for measurement to obtain a measurement value at a current time, and a time-varying phase value at the current time is calculated; S3, according to the time-varying phase value at the current time, the adjustment of a bias phase and a reference phase is carried out, so that the time-varying phase value at the current time is within a set linear interval; S4, the step S2 and the step S3 are repeated to realize the real-time estimation of the time-varying phase; and S5, after the measurement is finished, data processing is carried out on the estimation result according to actual needs. The application further optimizes the adjustment method of the time-varying phase estimation scheme based on the weak measurement technology, and proposes a real-time high-sensitivity estimation scheme capable of estimating the full-range phase.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of weak measurement, in particular, to a full-range time-varying phase real-time estimation method and system based on weak measurement technology. BACKGROUND

[0002] Since the advent of weak measurement technology, it has been widely applied to the measurement of various physical quantities due to its amplification effect in precision measurement and good technical noise suppression capability, and has achieved sensitivity that cannot be achieved by classical means. For many practical applications, the measured signal is usually unknown, random and time-varying. Since weak measurement technology limits the measured physical quantity to a small range, it is difficult to apply to practical environments, so expanding the dynamic range of weak measurement technology is a key problem in promoting weak measurement technology to practice.

[0003] When using weak measurement technology to measure unknown time-varying phase, the existing regulation technology can only expand the dynamic range to a limited extent.

[0004] Based on the time-varying parameter real-time estimation method and system based on weak measurement technology proposed in patent CN115310044A and the adaptive time-varying parameter real-time estimation method and system based on weak measurement technology proposed in patent CN115900780A, by introducing a reference phase, the estimation of time-varying parameters can be realized with adjustable sensitivity and dynamic range, but the range of action is still limited, and real-time estimation of full-range phase cannot be realized.

[0005] The present application aims to overcome the deficiencies in the prior art, and provides a time-varying parameter estimation scheme based on quantum weak measurement theory for full-phase estimation, which can realize real-time estimation of time-varying phase in the full-phase range, further expanding the application range of weak measurement technology. SUMMARY

[0006] In view of the deficiencies in the prior art, the present application aims to provide a full-range time-varying phase real-time estimation method based on weak measurement technology, comprising the following steps:

[0007] Step S1: Build a quantum weak measurement optical platform for real-time estimation of time-varying phase, introduce an unknown external signal in the interaction process to generate a time-varying phase; wherein the optical platform includes a double-channel real-time detection weak measurement platform and a single-channel real-time single-detection weak measurement platform;

[0008] Step S2: Measure using the quantum weak measurement optical platform to obtain the measurement value at the current time, and calculate the time-varying phase value at the current time;

[0009] Step S3: According to the time-varying phase value at the current time, the adjustment of the bias phase and the reference phase is carried out, so that the time-varying phase value at the current time is within the set linear interval;

[0010] Step S4: Steps S2 and S3 are repeated to realize real-time estimation of the time-varying phase;

[0011] Step S5: After the measurement is completed, the estimated results are processed according to actual needs.

[0012] Preferably, the step S3 comprises:

[0013] Step S3.1: According to the current observation index, the time-varying phase estimation value at the current time is calculated

[0014] Step S3.2: According to actual needs, the current phase estimation value is determined The bias phase interval and the reference phase interval need to be applied, and the target bias phase and reference phase adjustment interval are obtained;

[0015] Step S3.3: Judgment step: the bias phase and the reference phase of the current phase are compared with the target bias phase and reference phase adjustment interval respectively, if the current phase is not in the target bias phase and reference phase adjustment interval, the bias phase and the reference phase are adjusted; if the current phase is in the target bias phase and reference phase adjustment interval, the next measurement is directly carried out.

[0016] Preferably, in the step S1:

[0017] The double-path real-time detection weak measurement platform, the light emitted by the light source 1 is modulated into a preset pre-selection state in the pre-selection process, and the perceived external signal is encoded into a time-varying phase during the interaction process And adjusted by the bias phase to generate the bias phase The first light and the second light are generated by the beam splitter 2; the first light passes through the first reference phase to generate the reference phase The linear interval and the sensitivity are adjusted, and projected to the first post-selection process, and the projection measurement is carried out in the preset post-selection state; the second light passes through the mirror 3 and then passes through the second reference phase to generate the reference phase The linear interval and the sensitivity are adjusted, and projected to the second post-selection process, and the projection measurement is carried out in the preset post-selection state; the two light intensities are received by the balanced detector 4, and the phase estimation and adaptive control are carried out by the computer 5;

[0018] The computer 5 is connected with the bias phase, the first reference phase, the second reference phase and the balanced detector 4;

[0019] The included angle between the first back selection process and the front selection process is ε 11 The included angle between the second back selection process and the front selection process is ε 12 ε 11 is the negative of ε 12 , i.e. ε 11 + 12 = 0; the time-varying phase is the negative of the time-varying phase , i.e.

[0020] Preferably, in step S3.1,

[0021] For the two-path real-time detection weak measurement platform, the observation index is where I0 is the light intensity of the light source, I1() and I2() are the first and second detection light intensities respectively, is the value of the bias phase, and ε1= |ε 11 | = |ε 12 |, In the two-path real-time light intensity detection weak measurement, by adjusting the values of and , the system can always meet the weak measurement condition and the sensitivity amplification condition At time t j , the time-varying phase estimation value is

[0022] Preferably, in step S1,

[0023] The single-path real-time single-detection weak measurement platform, the light emitted by the light source 1 is modulated into a preset front selection state in the front selection process; after the interaction process, the perceived external signal is encoded into a time-varying phase and adjusted by the bias phase to generate a time-varying phase In the third reference phase, the time-varying phase is adjusted in the linear interval and the sensitivity, projected to the third back selection process, and measured in the preset back selection state; finally, the projected light intensity is received by the photodetector 6, and the phase estimation and adaptive control are performed by the computer 5; the computer 5 is connected with the bias phase, the third reference phase and the photodetector 6;

[0024] In step S3.1,

[0025] For the single-path real-time detection weak measurement platform, the observation index is Wherein, I0 is the light source intensity, I(t) is the detection light intensity, ε2 is the third post-selection process and the angle of the pre-selection, is the value of the third reference phase, is the value of the bias phase; in the single-channel real-time light intensity detection weak measurement, by adjusting and the value system can always meet the weak measurement condition and the sensitivity amplification condition At the moment t j , the time-varying phase estimation value

[0026] A full-range time-varying phase real-time estimation system based on weak measurement technology, comprising the following modules:

[0027] Module M1: build a quantum weak measurement optical platform for real-time estimation of time-varying phase, introduce unknown external signals in the interaction process to generate time-varying phase; wherein, the optical platform includes a double-channel real-time detection weak measurement platform and a single-channel real-time single-detection weak measurement platform;

[0028] Module M2: measure using the quantum weak measurement optical platform to obtain the measurement value at the current moment, and calculate the time-varying phase value at the current moment;

[0029] Module M3: adjust the bias phase and the reference phase according to the time-varying phase value at the current moment, so that the time-varying phase value at the current moment is within the set linear interval;

[0030] Module M4: repeatedly trigger module M2 and module M3 to work, and realize real-time estimation of time-varying phase;

[0031] Module M5: after the measurement is completed, perform data processing on the estimation result according to actual needs.

[0032] Preferably, the module M3 comprises:

[0033] Module M3.1: calculate the time-varying phase estimation value at the current moment according to the current observation index

[0034] Module M3.2: determine the current phase estimation value according to actual needs the bias phase interval and the reference phase interval that need to be applied, and obtain the target bias phase and reference phase adjustment interval;

[0035] Module M3.3: judging step: comparing the current phase of the bias phase, the reference phase with the target bias phase, the reference phase adjustment interval, if the current phase is not in the target bias phase, the reference phase adjustment interval, the bias phase and the reference phase are adjusted; if the current phase is in the target bias phase, the reference phase adjustment interval, the next measurement is directly carried out.

[0036] Preferably, in the module M1:

[0037] The double-path real-time detection weak measurement platform, the light emitted by the light source 1 is modulated into a preset pre-selection state in the pre-selection process, and the perceived external signal is encoded into a time-varying phase during the interaction process And adjusted by the bias phase to generate the bias phase The first light and the second light are generated by the beam splitter 2; the first light passes through the first reference phase to generate the reference phase Adjust the linear interval and the sensitivity, and project to the first post-selection process, and project the measurement in the preset post-selection state; the second light passes through the mirror 3 and then passes through the second reference phase to generate the reference phase Adjust the linear interval and the sensitivity, and project to the second post-selection process, and project the measurement in the preset post-selection state; the two light intensities are received by the balanced detector 4, and the phase estimation and adaptive control are carried out by the computer 5;

[0038] The computer 5 is connected with the bias phase, the first reference phase, the second reference phase and the balanced detector 4;

[0039] The angle between the first post-selection process and the pre-selection process is ε 11 The angle between the second post-selection process and the pre-selection process is ε 12 , ε 11 and ε 12 are opposite numbers, that is, ε 11 + 12 = 0; the time-varying phase and the time-varying phase are opposite numbers, that is

[0040] Preferably, in the module M3.1,

[0041] For the double-path real-time detection weak measurement platform, the observation index Where I0 is the light intensity of the light source, I1(), I2() are the first and second path detection light intensities, is the value of the bias phase, ε1=|ε 11 | = |ε 12 |, In the single-path real-time light intensity detection weak measurement, by adjusting the values of and , the system can always meet the weak measurement condition and the sensitivity amplification condition At the moment t j , the time-varying phase estimation value

[0042] Preferably, in the module M1,

[0043] The single-path real-time single-detection weak measurement platform, the light emitted by the light source 1 is modulated into a preset pre-selection state in the pre-selection process; after the interaction process, the perceived external signal is encoded into a time-varying phase and is adjusted by the bias phase to generate a time-varying phase The third reference phase generates a time-varying phase The linear interval and the sensitivity are adjusted, projected to the third post-selection process, and projected to the preset post-selection state for projection measurement; finally, the projected light intensity is received by the photodetector 6, and the phase estimation and adaptive control are performed by the computer 5; the computer 5 is connected with the bias phase, the third reference phase and the photodetector 6;

[0044] In the module M3.1,

[0045] For the single-path real-time detection weak measurement platform, the observation index Where I0 is the light intensity of the light source, I(t) is the detection light intensity, and is the value of the third reference phase, is the value of the bias phase; in the single-path real-time light intensity detection weak measurement, by adjusting the values of and , the system can always meet the weak measurement condition and the sensitivity amplification condition At the moment t j , the time-varying phase estimation value

[0046] Compared with the prior art, the present application has the following beneficial effects:

[0047] 1. From the overall technical point of view, the present application can realize real-time estimation of time-varying phase in the full phase range, further expanding the application range of weak measurement, and meeting the requirements of actual application;

[0048] 2. The present application has a wide range of applications and can be applied to single-path real-time light intensity weak measurement detection and double-path real-time light intensity weak measurement detection;

[0049] 3、The application can realize high-sensitivity real-time detection of the phase in the full phase range by inserting the bias phase and combining with the reference phase. BRIEF DESCRIPTION OF DRAWINGS

[0050] Other features, objects, and advantages of the application will become more apparent from the following detailed description of non-limiting embodiments, when read in conjunction with the accompanying drawings:

[0051] Figure 1 Flowchart of the application;

[0052] Figure 2 Double-channel real-time light intensity detection weak measurement schematic diagram;

[0053] Figure 3 Single-channel real-time light intensity detection weak measurement schematic diagram.

[0054] Shown in the figure:

[0055] DETAILED DESCRIPTION

[0056] The application will be described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the application, but do not limit the application in any form.

[0057] As Figure 1 shown, the application provides a full-range time-varying phase real-time estimation method based on weak measurement technology, comprising:

[0058] Step S1: Build a quantum weak measurement optical platform for real-time estimation of time-varying phase, introduce an unknown external signal in the interaction process to generate a time-varying phase; wherein the optical platform includes a double-channel real-time detection weak measurement platform and a single-channel real-time single-detection weak measurement platform;

[0059] Step S2: Measure using the quantum weak measurement optical platform to obtain the measurement value at the current time, and calculate the time-varying phase value at the current time;

[0060] Step S3: Adjust the bias phase and the reference phase according to the time-varying phase value at the current time, so that the time-varying phase value at the current time is within the set linear interval;

[0061] Step S4: Repeat steps S2 and S3 to realize real-time estimation of the time-varying phase;

[0062] Step S5: After the measurement is completed, the estimation result is processed according to actual needs.

[0063] The application range includes double-channel real-time detection weak measurement and single-channel real-time single-detection weak measurement. By adjusting and The system can always satisfy the weak measurement condition and the sensitivity amplification condition

[0064] As shown in Figure 2 , the two-path real-time detection weak measurement in the application scope of the application includes: a pre-selection process A, an interaction process B, a bias phase C, a first reference phase D, a first post-selection process E, a second reference phase F, and a second post-selection process G.

[0065] The light emitted by the light source is modulated into a preset pre-selection state in the pre-selection process, and when passing through the interaction process, the perceived external signal is encoded into a time-varying phase and is adjusted through the bias phase to generate a bias phase The first light and the second light are generated through a beam splitter; the first light passes through the first reference phase to generate a reference phase for linear interval and sensitivity adjustment, and is projected to the first post-selection process for projection measurement at a preset post-selection state; the second light passes through a mirror and then passes through the second reference phase to generate a reference phase for linear interval and sensitivity adjustment, and is projected to the second post-selection process for projection measurement at a preset post-selection state; the light intensity of the two paths is received by a balanced detector, and phase estimation and adaptive control are performed by a computer; the computer is connected with the bias phase, the first reference phase, the second reference phase, and the balanced detector.

[0066] In particular, the included angles of the first post-selection process and the second post-selection process with the pre-selection are opposite numbers; the first reference phase and the second reference phase are also opposite numbers.

[0067] For the two-path real-time light intensity detection weak measurement, the light intensity received by the balanced detector has where I0 is the light intensity of the light source, I1(t) and I2(t) are the first and second path detection light intensities, is an unknown phase, is the value of the bias phase, and ε1 is the absolute value of the included angle of the first post-selection process and the second post-selection process with the pre-selection, is the absolute value of the first reference phase and the second reference phase.

[0068] As shown in Figure 3 , the single-path real-time detection weak measurement in the application scope of the application includes a third reference phase H and a third post-selection process I.

[0069] The light emitted by the light source is modulated into a preset pre-selection state in a pre-selection process; after the interaction process, the perceived external signal is encoded into a time-varying phase And the bias phase is adjusted to generate a time-varying phase A time-varying phase is generated at the third reference phase The linear interval and the sensitivity are adjusted, projected into the third post-selection process, and projected into the preset post-selection state for projection measurement; the light intensity after the final projection is received by the photodetector, and the computer performs phase estimation and adaptive control; the computer is connected with the bias phase, the third reference phase and the photodetector;

[0070] For single-channel real-time light intensity detection weak measurement, the observation index has Where I0 is the light intensity of the light source, I(t) is the detected light intensity, is the unknown phase, and ε2 is the included angle of the third post-selection process and the pre-selection, is the value of the third reference phase, is the value of the bias phase.

[0071] The adjustment is as described in step S3, characterized in that it comprises:

[0072] Step S3.1: According to the current observation index, the time-varying phase estimation value at the current time is calculated

[0073] Step S3.2: According to the actual demand, the current phase estimation value is determined The bias phase interval and the reference phase interval required to be applied, and the target bias phase, reference phase adjustment interval are obtained;

[0074] Step S3.3: Judgment step: compare the bias phase and the reference phase of the current phase with the target bias phase and the target reference phase adjustment interval respectively, if the current phase is not in the target bias phase and the target reference phase adjustment interval, adjust the bias phase and the reference phase; if the current phase is in the target bias phase and the target reference phase adjustment interval, directly proceed to the next measurement.

[0075] The application also provides a full-range time-varying phase real-time estimation system based on weak measurement technology, which can be realized by executing the flow steps of the full-range time-varying phase real-time estimation method based on weak measurement technology, that is, those skilled in the art can understand the full-range time-varying phase real-time estimation method based on weak measurement technology as the preferred embodiment of the full-range time-varying phase real-time estimation system based on weak measurement technology.

[0076] Specifically, a full-range time-varying phase real-time estimation system based on weak measurement technology includes the following modules: module M1: a quantum weak measurement optical platform for time-varying phase real-time estimation is built, and an unknown external signal is introduced in the interaction process to generate a time-varying phase; wherein the optical platform includes a double-path real-time detection weak measurement platform and a single-path real-time single-detection weak measurement platform; module M2: measurement is performed using the quantum weak measurement optical platform to obtain the measurement value at the current time and calculate the time-varying phase value at the current time; module M3: the bias phase and the reference phase are adjusted according to the time-varying phase value at the current time, so that the time-varying phase value at the current time is within the set linear interval; module M4: modules M2 and M3 are repeatedly triggered to work, and real-time estimation of the time-varying phase is realized; module M5: after the measurement is completed, the estimation result is processed according to actual needs.

[0077] Specifically, module M3 includes: module M3.1: according to the current observation index, the time-varying phase estimation value at the current time is calculated Module M3.2: according to actual needs, the current phase estimation value is determined The bias phase interval and the reference phase interval need to be applied, and the target bias phase and reference phase adjustment interval are obtained; module M3.3: judgment step: the bias phase and the reference phase of the current phase are compared with the target bias phase and reference phase adjustment interval, respectively, if the current phase is not within the target bias phase and reference phase adjustment interval, the bias phase and the reference phase are adjusted; if the current phase is within the target bias phase and reference phase adjustment interval, the next measurement is directly performed.

[0078] Specifically, in module M1: the double-path real-time detection weak measurement platform, the light emitted by light source 1 is modulated into a preset pre-selection state in the pre-selection process, and the perceived external signal is encoded into a time-varying phase during the interaction process and is adjusted by the bias phase to generate a bias phase A first light and a second light are generated by a beam splitter 2; the first light passes through a first reference phase to generate a reference phase The linear interval and the sensitivity are adjusted, and are projected to a first post-selection process for projection measurement in a preset post-selection state; the second light passes through a mirror 3 and then passes through a second reference phase to generate a reference phase The linear interval and the sensitivity are adjusted, and are projected to a second post-selection process for projection measurement in a preset post-selection state; the light intensity of the two paths is received by a balanced detector 4, and phase estimation and adaptive control are performed by a computer 5; the computer 5 is connected with the bias phase, the first reference phase, the second reference phase, and the balanced detector 4;

[0079] The included angle between the first post-selection process and the pre-selection process is ε 11 The included angle between the second post-selection process and the pre-selection process is ε 12 ε 11 and ε 12 are opposite numbers, i.e., ε 11 + 12 = 0; the time-varying phase and the time-varying phase are opposite numbers, i.e.

[0080] Specifically, in the module M3.1,

[0081] For a two-path real-time detection weak measurement platform, the observation index is where I0 is the light intensity of the light source, I1() and I2() are the first and second detection light intensities, respectively, is the value of the bias phase, and ε1=|ε 11 | and ε2=|ε 12 | are the absolute values of the included angles between the third post-selection process and the pre-selection process and between the second post-selection process and the pre-selection process, respectively. In the two-path real-time light intensity detection weak measurement, by adjusting the values of and the system can always meet the weak measurement condition and the sensitivity amplification condition At the time t j , the time-varying phase estimation value

[0082] Specifically, in the module M1,

[0083] The single-path real-time single-detection weak measurement platform, the light emitted by the light source 1 is modulated into a preset pre-selection state in the pre-selection process; after the interaction process, the perceived external signal is encoded into a time-varying phase and is adjusted by the bias phase to generate a time-varying phase In the third reference phase, the time-varying phase is adjusted in the linear interval and the sensitivity, projected to the third post-selection process, and measured by projection in the preset post-selection state; finally, the projected light intensity is received by the photodetector 6, and the phase estimation and adaptive control are performed by the computer 5; the computer 5 is connected with the bias phase, the third reference phase, and the photodetector 6;

[0084] In the module M3.1, for a single-path real-time detection weak measurement platform, the observation index is where I0 is the light intensity of the light source, I(t) is the detection light intensity, and ε2 is the included angle between the third post-selection process and the pre-selection process. is the value of the third reference phase, is the value of the bias phase; in the single-path real-time light intensity detection weak measurement, by adjusting and the value system can always meet the weak measurement condition and the sensitivity amplification condition at the moment t j , the time-varying phase estimation value

[0085] The present application has the following beneficial effects:

[0086] From the overall technical point of view, the present application can realize real-time estimation of time-varying phase in the full phase range, further expanding the application range of weak measurement, meeting the requirements of practical application; the present application has a wide range of applications, and can be applied to single-path real-time light intensity weak measurement detection, and can also be applied to double-path real-time light intensity weak measurement detection; the present application can realize real-time detection of high sensitivity of the phase in the full phase range by inserting the bias phase and the joint action with the reference phase.

[0087] The specific embodiments of the present application are described above. It should be understood that the present application is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essential content of the present application. In the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other at will.

[0088] It should be pointed out that for those skilled in the art, without departing from the concept of the present application, some changes and improvements can be made. These all belong to the protection scope of the present application. Those skilled in the art understand that in addition to realizing the system and each device, module, unit provided by the present application in the form of pure computer readable program code, the same function can be realized by logically programming the method steps to make the system and each device, module, unit provided by the present application in the form of logic gate, switch, special integrated circuit, programmable logic controller and embedded microcontroller. Therefore, the system and each device, module, unit provided by the present application can be considered as a hardware component, and the devices, modules, units included therein for realizing various functions can also be considered as structures within the hardware component; the devices, modules, units for realizing various functions can also be considered as both software modules realizing the method and structures within the hardware component.

Claims

1. A method for real-time estimation of full-range time-varying phase based on weak measurement technique, characterized in that, It comprises the following steps: Step S1: building a quantum weak measurement optical platform for real-time estimation of time-varying phase, introducing an unknown external signal in the interaction process to generate a time-varying phase; wherein the optical platform comprises a double-path real-time detection weak measurement platform and a single-path real-time single-detection weak measurement platform; Step S2: measuring by using the quantum weak measurement optical platform to obtain the measurement value at the current time, and calculating the time-varying phase value at the current time; Step S3: adjusting the bias phase and the reference phase according to the time-varying phase value at the current time, so that the time-varying phase value at the current time is within the set linear interval; Step S4: repeating steps S2 and S3 to realize real-time estimation of the time-varying phase; Step S5: after the measurement is completed, the estimation result is processed according to actual needs; In the step S1, The dual-path real-time weak measurement platform, light emitted by the light source (1) is modulated into a preset pre-selection state in a pre-selection process, an external signal perceived during an interaction process is encoded into a time-varying phase , and is adjusted through a bias phase to generate a bias phase ; a first light and a second light are generated through a beam splitter (2); the first light passes through a first reference phase to generate a reference phase , linear interval and sensitivity are adjusted, and the first light is projected to a first post-selection process for projection measurement at a preset post-selection state; the second light passes through a mirror (3) and then passes through a second reference phase to generate a reference phase , linear interval and sensitivity are adjusted, and the second light is projected to a second post-selection process for projection measurement at a preset post-selection state; the two light intensities are received by a balanced detector (4), and phase estimation and adaptive control are performed by a computer (5); The computer (5) is connected with the bias phase, the first reference phase, the second reference phase and the balanced detector (4); The angle between the first post-selection process and the first pre-selection process is The angle between the second post-selection process and the first selection process is , and They are opposites, that is Time-varying phase and time-varying phase They are opposites, that is ; The step S3 comprises: Step S3.1: Calculate the time-varying phase estimation value at the current time according to the current observation index ; Step S3.2: Determine the current phase estimation value according to actual requirements The bias phase interval and the reference phase interval to be applied are determined, and the target bias phase and reference phase adjustment intervals are obtained. Step S3.3: judgment step: comparing the bias phase and the reference phase of the current phase with the target bias phase and reference phase adjustment interval respectively, if the current phase is not in the target bias phase and reference phase adjustment interval, adjusting the bias phase and the reference phase; if the current phase is in the target bias phase and reference phase adjustment interval, directly proceed to the next measurement; In step S3.1, For a dual-path real-time detection weak measurement platform, observation indicators in Light intensity of the light source , These are the first and second probe light intensities, respectively. It is the offset phase. , When performing weak measurements using dual-channel real-time light intensity detection, by adjusting... and The value system can always satisfy the weak measurement conditions. and sensitivity amplification conditions ;exist At time t, the time-varying phase estimate, ; is the absolute value of the first reference phase and the second reference phase.

2. The method of claim 1, wherein the method is a weak measurement technique based full range time-varying phase real-time estimation method, characterized in that, In step S1, The single-path real-time single-probe weak measurement platform, light emitted by the light source (1) is modulated into a preset pre-selection state in a pre-selection process; after an interaction process, an external signal perceived is encoded into a time-varying phase , and is adjusted through a bias phase to generate a bias phase ; a time-varying phase is generated at a third reference phase , linear interval and sensitivity adjustment is performed, projection is performed to a third post-selection process, projection measurement is performed at a preset post-selection state; finally, the light intensity after projection is received by a photodetector (6), and phase estimation and adaptive control are performed by a computer (5); the computer (5) is connected with the bias phase, the third reference phase and the photodetector (6) In step S3.1, For single path real-time detection weak measurement platform, observation index Wherein, is the light intensity of the light source, is the detection light intensity, is the included angle of the third post-selection process and pre-selection, is the value of the third reference phase, is the value of the bias phase; in single path real-time light intensity detection weak measurement, by adjusting and the value system can always meet the weak measurement condition At moment, the time-varying phase estimation value .

3. A system for real-time estimation of full-range time-varying phase based on weak measurement technique, characterized in that, It comprises the following modules: Module M1: building a quantum weak measurement optical platform for real-time estimation of time-varying phase, introducing an unknown external signal in the interaction process to generate a time-varying phase; wherein the optical platform comprises a double-path real-time detection weak measurement platform and a single-path real-time single-detection weak measurement platform; Module M2: measuring by using the quantum weak measurement optical platform to obtain the measurement value at the current time, and calculating the time-varying phase value at the current time; Module M3: adjusting the bias phase and the reference phase according to the time-varying phase value at the current time, so that the time-varying phase value at the current time is within the set linear interval; Module M4: repeating the triggering of module M2 and module M3 to realize real-time estimation of the time-varying phase; Module M5: after the measurement is completed, the estimation result is processed according to actual needs; In the module M1, The dual-path real-time detection weak measurement platform, light emitted by the light source (1) is modulated into a preset pre-selection state in a pre-selection process, an external signal perceived during an interaction process is encoded into a time-varying phase , and is adjusted through a bias phase to generate a bias phase ; a first light and a second light are generated through a beam splitter (2); the first light passes through a first reference phase to generate a reference phase , linear interval and sensitivity are adjusted, and the first light is projected to a first post-selection process for projection measurement at a preset post-selection state; the second light passes through a mirror (3) and then passes through a second reference phase to generate a reference phase , linear interval and sensitivity are adjusted, and the second light is projected to a second post-selection process for projection measurement at a preset post-selection state; the light intensity of the two paths is received by a balanced detector (4), and phase estimation and adaptive control are performed by a computer (5); The computer (5) is connected with the bias phase, the first reference phase, the second reference phase and the balanced detector (4); The angle between the first post-selection process and the first pre-selection process is The angle between the second post-selection process and the first selection process is , and They are opposites, that is Time-varying phase and time-varying phase They are opposites, that is ; The module M3 comprises: Module M3.1 : Calculate the time-varying phase estimate at the current time instant from the current observation metrics ; Module M3.2: determining the current phase estimate value according to actual requirements The bias phase interval and the reference phase interval to be applied are determined, and the target bias phase and reference phase adjustment intervals are obtained. Module M3.3: judgment step: comparing the bias phase and the reference phase of the current phase with the target bias phase and reference phase adjustment interval respectively, if the current phase is not in the target bias phase and reference phase adjustment interval, adjusting the bias phase and the reference phase; if the current phase is in the target bias phase and reference phase adjustment interval, directly proceed to the next measurement; In module M3.1, For a dual-path real-time detection weak measurement platform, observation indicators in Light intensity of the light source , These are the first and second probe light intensities, respectively. It is the value of the bias phase. , When performing weak measurements using dual-channel real-time light intensity detection, by adjusting... and The value system can always satisfy the weak measurement conditions. and sensitivity amplification conditions ;exist At time t, the time-varying phase estimate, ; is the absolute value of the first reference phase and the second reference phase.

4. The full range time-varying phase real-time estimation system based on weak measurement technology of claim 3, wherein, In module M1, The single-path real-time single-probe weak measurement platform, light emitted by the light source (1) is modulated into a preset pre-selection state in a pre-selection process; after an interaction process, an external signal perceived is encoded into a time-varying phase , and is adjusted through a bias phase to generate a bias phase ; a time-varying phase is generated at a third reference phase , linear interval and sensitivity adjustment is performed, projection is performed to a third post-selection process, projection measurement is performed at a preset post-selection state; finally, the light intensity after projection is received by a photodetector (6), and phase estimation and adaptive control are performed by a computer (5); the computer (5) is connected with the bias phase, the third reference phase and the photodetector (6) In module M3.1, For single path real-time detection weak measurement platform, observation index Wherein, is the light intensity of the light source, is the detection light intensity, is the included angle of the third post-selection process and pre-selection, is the value of the third reference phase, is the bias phase; in single path real-time light intensity detection weak measurement, by adjusting and the value system can always meet the weak measurement condition At moment, the time-varying phase estimation value .

Images