A quantum radar experimental device based on a non-classical state light field

Abstract

This invention belongs to the field of target detection and recognition technology, and proposes a quantum radar experimental device based on a non-classical optical field. The device comprises a transmitter, a receiver, and a transmission-receiver synchronization system. The transmitter includes a light source unit, a non-classical optical field control unit, and a signal collimation and transmission unit. The receiver includes a signal collection unit, a detection unit, and a data discrimination unit. The transmission-receiver synchronization system enables clock synchronization and real-time communication between the transmitter and receiver. This invention can effectively overcome the high dependence of existing quantum radars on quantum entanglement, improve the ease of operation and equipment of quantum radar, enhance the detection capability of dark and small targets, and provide key technical support for the large-scale application of quantum radar in the future.

Description

Technical Field

[0001] This invention belongs to the field of target detection and recognition technology, specifically relating to a quantum radar experimental device based on a non-classical optical field. Background Technology

[0002] Quantum radar is a novel type of radar that uses the unique properties of quantum states for target detection and identification. It has unique advantages in detecting weak targets under strong background noise and targets with low damage thresholds. Many research institutions both domestically and internationally have invested significant human and material resources in the research of quantum radar technology.

[0003] Currently, quantum radar is generally based on the principle of quantum correlation in quantum entanglement states. It obtains target information by preparing and transmitting quantum entanglement, receiving echo signals, and measuring and processing quantum states. Quantum radar based on quantum entanglement states exhibits excellent performance. However, on the one hand, quantum entanglement states themselves are extremely sensitive to the environment, easily subject to loss, and the entanglement quality rapidly decreases in noisy environments. On the other hand, the preparation, detection, and verification processes of quantum entanglement states are cumbersome, requiring high levels of experimental skill from operators, thus presenting a significant technical barrier for the large-scale application of quantum radar in the future.

[0004] To address this, the present invention proposes a quantum radar experimental device based on a non-classical optical field that is easier to operate and equip. This device fully utilizes the quantum statistics of the non-classical optical field state, and by distinguishing the distribution of quantum photons recorded by the photon detector, it achieves a significant improvement in target detection performance. Summary of the Invention

[0005] The present invention aims to solve the technical problems existing in the prior art and provide a quantum radar experimental device based on non-classical optical fields.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a quantum radar experimental device based on a non-classical optical field, comprising a transmitter, a receiver, and a transmit / receive synchronization system;

[0007] The transmitter consists of a light source unit, a non-classical light field modulation unit, and a signal collimation and transmission unit;

[0008] The receiver consists of a signal collection unit, a detection unit, and a data discrimination unit;

[0009] The transceiver synchronization system enables clock synchronization and real-time communication between the transmitter and receiver.

[0010] In a preferred embodiment of the present invention, the light source unit is a laser.

[0011] In a preferred embodiment of the present invention, the non-classical optical field manipulation unit consists of beam generators BS1, BS2 and BS3.

[0012] In a preferred embodiment of the present invention, the signal collimation and transmission unit is composed of a collimating lens ZL1.

[0013] In a preferred embodiment of the present invention, the signal collection unit consists of a collimating lens ZL2 and an optical beam splitter BS4.

[0014] In a preferred embodiment of the present invention, the detection unit includes a single-photon detector D2 and a light collector SJQ.

[0015] In a preferred embodiment of the present invention, the transmitter and receiver are equipped with a transceiver synchronization system A and a transceiver synchronization system B for real-time communication of clock synchronization and control information between the two.

[0016] In a preferred embodiment of the present invention, single-photon detectors D0 and D1 are also included.

[0017] In a preferred embodiment of the present invention, the data processing method for target detection is as follows:

[0018] Step 1: Initially, the experiment is set to count the number of effective counts M, and the cumulative detection result of detector D2 is N' = 0.

[0019] Step 2: First, compare the number of photons detected by single-photon detector D0. If D0 detects 0 photons, then compare the detection status of single-photon detector D1. If D1 does not detect 1 photon, stop the current iteration and continue to the next iteration. If D1 detects 1 photon, then add the number of photons detected by single-photon detector D2 to N' and continue to the next iteration. Continue until M valid detections are performed, at which point the loop terminates.

[0020] Step 3: After the loop terminates, compare N' with the preset threshold N. th Compare, if N'>N th If the target exists, output "Target exists"; otherwise, if the target does not exist, output "No target exists".

[0021] In a preferred embodiment of the present invention, in step 1, at the beginning, the effective number of counts M is set in the experiment, and the cumulative detection result N' of the detector D1 is 0;

[0022] Step 2: The experiment will first compare the number of photons detected by single-photon detector D0. If D0 detects 1 photon, the current iteration will stop and the next iteration will begin. If D0 detects 0 photons, the number of photons detected by single-photon detector D1 will be added to N', and the next iteration will begin, continuing until M valid detections have been performed, at which point the loop will terminate.

[0023] Step 3: After the loop terminates, compare N' with the preset threshold N. th Compare, if N'>N th If the target exists, output "Target exists"; otherwise, if the target does not exist, output "No target exists".

[0024] The principle and beneficial effects of this invention are as follows: 1. In this invention, non-classical states are generated by controlling the most commonly used classical (coherent) light field. The control process is a real-time online and traceable process, and the generation of non-classical states can be determined by the counting of photon counters.

[0025] 2. This invention does not require a quantum entangled state preparation system. It utilizes only coherent states and mature commercial single-photon detection technology to complete the preparation, detection, and processing of non-classical states and echo signals, achieving a high system duty cycle (approximately 16%). In contrast, in traditional quantum radar based on quantum entanglement, the generation of quantum entanglement is mostly probabilistic, resulting in a low system duty cycle (less than one-thousandth).

[0026] 3. This invention employs multiple signal transmissions and receptions, eliminating the need for quantum entanglement and quantum storage between these signals. Target detection can be achieved using a local measurement method that detects and accumulates measurement results sequentially, offering flexibility and ease of implementation.

[0027] 4. This invention uses an optical collector to recover idle photons in the quantum radar receiver, avoiding the increase in noise level in the optical path caused by the reflection of idle photons at the end face.

[0028] 5. The present invention adopts separate placement of the transmitter and receiver. When conditions permit, it can also be designed as an integrated transmitter and receiver to achieve a high degree of integration of quantum radar.

[0029] 6. The quantum radar prepared by this invention can be used for rapid detection of faint targets against a strong background, and can also be applied to the detection of targets with low damage thresholds, high value targets, or organisms.

[0030] 7. The quantum radar experimental device proposed in this invention can also be extended to the microwave band. By preparing and transmitting non-classical microwave fields, quantum radar and microwave radar can be integrated to improve the target detection capability.

[0031] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0032] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0033] Figure 1This is an overall schematic diagram of the present invention;

[0034] Figure 2 This is a schematic diagram of the transmitter and receiver in Embodiment 1 of the present invention;

[0035] Figure 3 This is a schematic diagram showing the port markings of the optical beam splitter in Embodiment 1 of the present invention;

[0036] Figure 4 This is a data processing flowchart for target detection in Scheme 1 of the present invention;

[0037] Figure 5 This is the density matrix of quantum states received by the receiver in Embodiment 1 of the present invention, where the target reflectivity is κ = 0.2, the modulation factor is t = 0.2, and the coherence state parameter is α = 0.8.

[0038] Figure 6 The detection results N0' of detector D2 when there is no target and N1' of detector D2 when there is a target in Scheme 1 of this invention are given, where the target reflectivity is κ = 0.2, the control factor t = 0.2, and the coherence state parameter α = 0.8.

[0039] Figure 7 In the first embodiment of this invention, the probability of misjudgment is given by the target reflectivity κ = 0.2, the control factor t = 0.2, and the coherence state parameter α = 0.8.

[0040] Figure 8 This represents the probability of preparing a non-classical state under typical parameters in Scheme 1 of this invention, where the target reflectivity κ = 0.2, the regulation factor t = 0.1–0.25, the coherence parameter α = 0.8, and the success rate of preparing the non-classical state is approximately 16%.

[0041] Figure 9 This is a schematic diagram of the transmitter and receiver in embodiment two of the present invention;

[0042] Figure 10 This is a data processing flowchart for target detection in Scheme 2 of the present invention;

[0043] Figure 11 The two values ​​are the detection results N0' of the detector D1 when there is no target and N1' of the detector D1 when there is a target in Scheme 2 of the present invention, where the target reflectivity is κ = 0.2 and the coherence state parameter is α = 0.8.

[0044] Figure 12 The false positive probability is given in Scheme 2 of this invention, where the target reflectivity is κ = 0.2, the control factor is t = 0.2, and the coherence state parameter is α = 0.8. Detailed Implementation

[0045] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0046] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "vertical", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0047] In the description of this invention, unless otherwise specified and limited, it should be noted that the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, or internal connections between two components. They can be direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0048] This application provides a quantum radar experimental device based on a non-classical optical field, as shown in the attached figure. Figure 1 As shown, it consists of a transmitter, a receiver, and a transmission-reception synchronization system. The transmitter includes a light source unit, a non-classical light field control unit, and a signal collimation and transmission unit.

[0049] The receiver consists of a signal collection unit, a detection unit, and a data discrimination unit.

[0050] Inside the transmitter: the light source unit prepares the coherent light field. Although this is a classical light field, it is subsequently controlled by a non-classical light field modulation unit, resulting in a non-classical light field state. After signal collimation and transmission, the non-classical light field evolves into two light fields with specific photon number statistics. One field is emitted to the target area to interact with the target, while the other is directly emitted to the receiver for subsequent detection.

[0051] Inside the receiver unit: the signal collection unit is first responsible for receiving the light field reflected back from the target, and simultaneously coupled to the detection unit along with another output from the transmitter for photon detection. The detection unit outputs the detection results to the data discrimination unit, which determines the target information by comparing the accumulated detection results over a period of time with a pre-set threshold.

[0052] The transmitter and receiver are equipped with a transceiver synchronization system A and a transceiver synchronization system B for clock synchronization and real-time communication of control information. Specifically, the transceiver synchronization system transmits commands to instruct the light source unit to prepare the light source. The control results of the non-classical light field are fed back to transceiver synchronization system A, which then sends the control information to transceiver synchronization system B. Transceiver synchronization system B instructs the receiver to collect signals according to the timing sequence. Finally, the receiver's target information is also communicated to the transmitter through the transceiver synchronization system for more targeted target search and detection.

[0053] Implementation Plan 1

[0054] like Figure 2 As shown, this is the quantum radar experimental device based on a non-classical optical field in Embodiment 1. We will refine the transmitter and receiver. Specifically: the light source unit in the transmitter is a highly stable commercial laser, which will operate in pulsed form, emitting a coherent optical field with parameter α with each excitation. The non-classical optical field manipulation unit in the transmitter is composed of optical beam splitters BS1, BS2, and BS3.

[0055] Figure 3 A schematic diagram of the port markings of the optical beam splitter is provided.

[0056] The non-classical optical field manipulation unit modulates the coherent state as follows: The coherent state to be manipulated is input to the second input terminal ② of optical beamsplitter BS3. The input states of the first input terminals ① of optical beamsplitters BS1 and BS2 are 0-photon state |0> and 1-photon state |1>, respectively. The second input terminal ② of optical beamsplitter BS2 is the 0-photon state |0>. The first output terminal ③ of BS2 is connected to the first input terminal ① of BS3, and the second output terminal ④ of BS2 is connected to the second input terminal ② of BS1. The first output terminal ③ of optical beamsplitter BS1 is directly connected to the second input terminal ② of optical beamsplitter BS4 in the signal collection unit of the receiver. The second output terminal ④ of optical beamsplitter BS1 is the output of the non-classical optical field manipulation unit. The manipulation information of the non-classical optical field manipulation unit is marked by the detection results of single-photon detectors D0 and D1. When (D0,D1) detects (0,1) photons respectively, the non-classical optical field manipulation unit is successfully manipulated. At this time, the output of the non-classical optical field manipulation unit is directly coupled to the signal collimation and emission unit. Figure 2 The signal collimation and transmission unit is implemented by the collimating lens ZL1.

[0057] As part of the experimental setup, an optical beam splitter BS0 represents a target with transmittance T0 and reflectivity 1-T0. The echo signal reflected from the target is collected by the signal collection unit in the receiver. Figure 2As shown, the signal collection unit consists of a collimating lens ZL2 and an optical beam splitter BS4. The output of the collimating lens is directly connected to the first input terminal ① of the optical beam splitter BS4. As mentioned earlier, the second input terminal ② of the optical beam splitter BS4 is connected to the first output terminal ③ of the optical beam splitter BS1. The light field at the first output terminal ③ of the optical beam splitter BS4 is collected by the light field recovery unit and no longer participates in subsequent detection and signal processing. The light field at the second output terminal ④ of the optical beam splitter BS4 is detected by the single-photon detector D2.

[0058] Figure 2 In this embodiment, the transmittance of the five optical beam splitters BS0, BS1, BS2, BS3, and BS4 are T0 = 1 - κ, T1 = 0.2, T2 = t, T3 = 0.5, and T4 = 0.5, respectively, where t (t < 0.5) is a control factor. The focal lengths of the collimating lenses ZL1 and ZL2 can be set as needed according to actual target detection requirements; in this example, the focal lengths of both ZL1 and ZL2 are 20 cm. The laser operates at a wavelength of 1064 nm with a repetition frequency of 100 kHz. The efficiencies of the single-photon detectors D0, D1, and D2 are all 85%.

[0059] Figure 2 The single-photon detector D2 and the optical collector (SJQ) are the detection units in the receiver. The single-photon detector converts the echo signal returned from the target into photon counts. The optical collector (SJQ) is responsible for collecting idle photons, preventing reflections of idle photons at the end face from increasing the noise level in the optical path.

[0060] Figure 4 A data processing flowchart for target detection is provided. Initially, the experiment sets the effective counting count to M, and the cumulative detection result of detector D2 is N' = 0. Since the non-classical optical field manipulation unit is only successfully manipulated when (D0, D1) respectively detects (0, 1) photons, the experiment first compares the number of photons detected by single-photon detector D0. If D0 detects 0 photons, the detection status of single-photon detector D1 is compared. If D1 does not detect any photons, the current iteration is terminated, and the next iteration continues. If D1 detects one photon, the number of photons detected by single-photon detector D2 is added to N', and the next iteration continues. This continues until M effective detections are performed, at which point the loop terminates. After the loop terminates, N' is compared with a pre-set threshold N. th Compare, if N'>N th If the target exists, output "Target exists"; otherwise, if the target does not exist, output "No target exists". Threshold N thThe threshold is set in a symmetrical manner, meaning that the detection probability and the false alarm probability are exactly equal under that threshold condition. Therefore, when the prior probabilities of target non-existence and target presence are equal, the detection probability and the false alarm probability are equal, and both are equal to the misjudgment probability.

[0061] Figure 5 The density matrix elements of the quantum states received by the receiver of the quantum radar are given when the target reflectivity is κ = 0.2, the modulation factor t = 0.2, and the coherence state parameter α = 0.8.

[0062] Figure 6 The probability distributions of photon counts received by detector D2 of the quantum radar with and without a target are presented when the reflectivity is κ = 0.2, the control factor t = 0.2, the coherence state parameter α = 0.8, and M = 100. These two distributions belong to different distributions and can be differentiated by setting a threshold N. th =22.6 for differentiation.

[0063] Figure 7 (a) The false alarm probability P of the quantum radar is given when the reflectivity is κ = 0.2, the control factor is t = 0.2, and the coherence state parameter is α = 0.8. err,Q The false positive probability P of classical radar err,C Under the same parameter conditions, the false alarm probability of quantum radar is much lower than that of classical radar. Figure 7 (b) The ratio of the false positive probability of classical radar and quantum radar is given. When M = 2000, the false positive probability of classical radar is 8 times that of quantum radar, which fully demonstrates the superior performance of quantum radar in target detection.

[0064] Figure 8 The probability of nonclassical state preparation is given when κ = 0.2, coherence parameter α = 0.8, and the control factor varies from t = 0.1 to 0.25. Here, the nonclassical state preparation probability refers to the probability that detector D0 detects 0 photons and D1 detects 1 photon. This probability varies by about 16%, which is much higher than the one-thousandth probability of entangled pair preparation in common entangled state preparation.

[0065] Implementation Plan 2

[0066] Figure 9The quantum radar experimental setup based on non-classical optical fields in Embodiment 2 is presented. We detail the transmitter and receiver. Specifically: the light source unit in the transmitter consists of paired coherent state sources. These sources operate in pulsed form, emitting two coherent optical fields, each with parameter α, with each excitation. One coherent optical field is input to optical path E, and the other to optical path A0. The non-classical optical field control unit in the transmitter is composed of optical beam splitters BS1 and BS2. The schematic diagram of the port markings of the optical beam splitters is the same as in Embodiment 1. Figure 3 same.

[0067] The non-classical optical field manipulation unit modulates the coherent state as follows: The manipulated coherent state is input to the second input terminal ② of optical beam splitter BS2. The first input terminal ① of optical beam splitter BS1 inputs a coherent optical field with parameter α. The first input terminal ① of optical beam splitter BS2 inputs a 1-photon state |1>. The second input terminal ② of optical beam splitter BS2 inputs a coherent optical field with parameter α. The first output terminal ③ of optical beam splitter BS2 is connected to single-photon detector D0, and the second output terminal ④ of optical beam splitter BS2 is connected to the second input terminal ② of BS1. The first output terminal ③ of optical beam splitter BS1 is directly connected to the second input terminal ② of optical beam splitter BS4 in the signal collection unit of the receiver. The second output terminal ④ of optical beam splitter BS1 is the output of the non-classical optical field manipulation unit. The manipulation information of the non-classical optical field manipulation unit is marked by the detection results of single-photon detector D0. When D0 detects 0 photons, the non-classical optical field manipulation unit is successfully manipulated. At this time, the output of the non-classical optical field manipulation unit is directly coupled to the signal collimation and emission unit. Figure 9 The signal collimation and transmission unit is implemented by the collimating lens ZL1.

[0068] As part of the experimental setup, an optical beam splitter BS0 represents a target with transmittance and reflectance. The echo signal reflected from the target is collected by the signal collection unit in the receiver. Figure 9 As shown, the signal collection unit consists of a collimating lens ZL2 and an optical beam splitter BS4. The output of the collimating lens ZL2 is directly connected to the first input terminal ① of the optical beam splitter BS4. The second input terminal ② of the optical beam splitter BS4 is connected to the first output terminal ③ of the optical beam splitter BS1. The output light field from the first output terminal ③ of the optical beam splitter BS4 is detected by a single-photon detector D1. The light field from the second output terminal ④ of the optical beam splitter BS4 is collected by a light field recovery unit and is no longer involved in subsequent detection and signal processing.

[0069] Figure 9In the optical beam splitter configuration, the transmittances of the four beam splitters BS0, BS1, BS2, and BS4 are T0 = 1 - κ, T1 = 0.2, T2 = 0.9, and T4 = 0.5, respectively. The focal lengths of the collimating lenses ZL1 and ZL2 can be set as needed based on actual target detection requirements; in this implementation example, the focal lengths of both ZL1 and ZL2 are set to 20 cm. The laser operates at a wavelength of 1064 nm with a repetition frequency of 100 kHz. The efficiencies of the single-photon detectors D0 and D1 remain at 85%.

[0070] Figure 9 The single-photon detector D1 and the optical collector (SJQ) are the detection units in the receiver. The single-photon detector converts the echo signal returned from the target into photon counts. The optical collector (SJQ) is responsible for collecting idle photons, preventing reflections of idle photons at the end face from increasing the noise level in the optical path.

[0071] Figure 10 A data processing flowchart for target detection is provided. The experiment sets the effective counting count to M, and the cumulative detection result of detector D1 is N' = 0. Since the non-classical optical field manipulation unit is only successfully manipulated when D0 detects 0 photons, the experiment first compares the number of photons detected by single-photon detector D0. If D0 detects 1 photon, the current iteration stops, and the next iteration continues. If D0 detects 0 photons, the number of photons detected by single-photon detector D1 is added to N', and the next iteration continues. This continues until M effective detections are performed, at which point the loop terminates. After the loop terminates, N' is compared with a pre-set threshold N. th Compare, if N'>N th If the target exists, output "Target exists"; otherwise, if the target does not exist, output "No target exists". Threshold N th The threshold is set in a symmetrical manner, meaning that the detection probability and the false alarm probability are exactly equal under that threshold condition. Therefore, when the prior probabilities of target non-existence and target presence are equal, the detection probability and the false alarm probability are equal, and both are equal to the misjudgment probability.

[0072] Figure 11 The probability distributions of photon counts received by detector D1 in a quantum radar with reflectivity κ = 0.2, M = 20, and coherence state parameter α = 0.8 are presented, considering both the presence and absence of a target. These two distributions belong to different distributions and can be differentiated by setting a threshold N. th =11.2 to make distinctions.

[0073] Figure 12 (a) The false alarm probability P of a quantum radar with reflectivity κ = 0.2, M = 1–30, and coherence state parameter α = 0.8 is given. err,Q The false positive probability P of classical radarerr,C Under the same parameter conditions, the false alarm probability of quantum radar is much lower than that of classical radar. Figure 7 (b) gives the ratio of the false alarm probability of classical radar and quantum radar. When M = 1 to 30, the false alarm probability of quantum radar is reduced by M = 2 to 4000 times compared with classical radar, which fully demonstrates the superior performance of quantum radar in target detection.

Claims

1. A quantum radar experimental device based on a non-classical state light field, characterized in that, The transmitter, the receiver and the transceiving synchronization system are included; The transmitter includes a light source unit, a non-classical light field regulation unit and a signal collimation and emission unit; The receiver includes a signal collection unit, a detection unit and a data discrimination unit; The transceiving synchronization system realizes clock synchronization and real-time communication of the transmitter and the receiver; The non-classical light field regulation unit is composed of beam splitters BS1, BS2 and BS3; The detection unit includes a single-photon detector D2 and a light collector SJQ; It also includes a single-photon detector D0 and a single-photon detector D1; The regulation information of the non-classical light field regulation unit is marked by the detection results of the single-photon detectors D0 and D1; when (D0, D1) respectively detects (0, 1) photons, the non-classical light field regulation unit successfully regulates. The data processing method of target detection is as follows: Step 1: At the beginning, set the effective count number M, and accumulate N' = 0 of the detection results of the detector D2; Step 2: First compare the number of photons detected by the single-photon detector D0, if D0 detects 0 photons, then compare the detection of the single-photon detector D1, if D1 does not detect 1 photon, then stop this time and continue the next cycle, if D1 detects 1 photon, then accumulate the number of photons detected by the single-photon detector D2 to N' at this time, continue the next cycle, until M effective detections are performed, and the cycle is terminated; Step 3: After the cycle is terminated, compare N' with the pre-set threshold Nth, if N' > Nth, the target exists, and output target; otherwise, the target does not exist, and output no target; The detection unit outputs the detection results to the data discrimination unit, and the data discrimination unit realizes the judgment of target information by comparing the accumulated detection results in a period of time with the pre-set threshold; The regulation of the non-classical light field regulation unit on the coherent state is as follows: the regulated coherent state is input to the second input end ② of the optical beam splitter BS3; the input states of the first input ends ① of the optical beam splitters BS1 and BS2 are 0 photon state |0> and 1 photon state |1> respectively; the second input end ② of the optical beam splitter BS2 is input as 0 photon state |0>; the first output end ③ of BS2 is connected with the first input end ① of BS3, and the second output end ④ of BS2 is connected with the second input end ② of BS1; The first output end ③ of the optical beam splitter BS1 is directly connected with the second input end ② of the optical beam splitter BS4 in the signal collection unit of the receiver; and the second output end ④ of the optical beam splitter BS1 is the output of the non-classical light field regulation unit; The regulation information of the non-classical light field regulation unit is marked by the detection results of the single-photon detectors D0 and D1; when (D0, D1) respectively detects (0, 1) photons, the non-classical light field regulation unit successfully regulates.

2. The non-classical state of light field based quantum radar experimental apparatus of claim 1, wherein, The light source unit is a laser.

3. The non-classical state of light field based quantum radar experimental apparatus of claim 2, wherein, The signal collimation and emission unit is composed of a collimating lens ZL1.

4. The non-classical state of light field based quantum radar experimental apparatus of claim 3, wherein, The signal collection unit is composed of a collimating lens ZL2 and an optical beam splitter BS4.

5. The non-classical state of light field based quantum radar experimental apparatus of claim 4, wherein, The transmitter and the receiver are equipped with a set of transceiver synchronization system A and transceiver synchronization system B for clock synchronization and real-time communication of control information between them.

6. A quantum radar experimental device based on a non-classical state light field, characterized in that, The transmitter, the receiver and the transceiver synchronization system are included; The transmitter includes a light source unit, a non-classical light field control unit, and a signal collimation and emission unit; The receiver includes a signal collection unit, a detection unit, and a data discrimination unit; The transceiver synchronization system realizes clock synchronization and real-time communication of the transmitter and the receiver; The data processing method of target detection is as follows: Step 1: At the beginning, the experiment sets the effective count number M, and the detection result of the detector D1 is accumulated N'=0; Step 2: During the experiment, the number of photons detected by the single-photon detector D0 is first compared. If D0 detects 1 photon, the current cycle is terminated and the next cycle continues. If D0 detects 0 photons, the number of photons detected by the single-photon detector D1 is accumulated to N', and the next cycle continues, until M effective detections are performed, and the cycle terminates; Step 3: After the cycle terminates, N' is compared with the pre-set threshold Nth. If N'>Nth, the target exists, and the output is target; otherwise, the target does not exist, and the output is no target; The control of the coherent state by the non-classical light field control unit is performed as follows: the controlled coherent state is input to the second input end ② of the optical beam splitter BS2; the first input end ① of the optical beam splitter BS1 inputs a coherent state light field with parameter α; the first input end ① of the optical beam splitter BS2 inputs a 1-photon state |1>; the second input end ② of the optical beam splitter BS2 inputs a coherent state light field with parameter α; the first output end ③ of the optical beam splitter BS2 is connected with the single-photon detector D0, and the second output end ④ of the optical beam splitter BS2 is connected with the second input end ② of BS1; The first output end ③ of the optical beam splitter BS1 is directly connected with the second input end ② of the optical beam splitter BS4 in the signal collection unit of the receiver; The second output end ④ of the optical beam splitter BS1 is the output of the non-classical light field control unit; The control information of the non-classical light field control unit is marked by the detection result of the single-photon detector D0; When D0 detects 0 photons, the non-classical light field control unit is successfully controlled.

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