Quantum random number generator with adjustable rate

Abstract

The utility model discloses a quantum random number generator with an adjustable rate. The quantum random number generator comprises a quantum light source, a luminous flux adjusting module, a detection module and a post-processing module, the output end of the quantum light source and the output end of the post-processing module are respectively connected with the input end of the luminous flux adjusting module, the output end of the luminous flux adjusting module is connected with the input end of the detection module, and the output end of the detection module is connected with the input end of the post-processing module. The utility model discloses a quantum random number generator with an adjustable rate, which can dynamically control the luminous flux between a quantum light source and a detection module by triggering a luminous flux adjusting module through a post-processing module, thereby realizing the flexible management of the generation rate of a random number. Meanwhile, energy consumption can be reduced, and waste of data resources can be avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to quantum network and quantum random number generator technical field, concretely relates to a kind of adjustable rate quantum random number generator. BACKGROUND

[0002] With the rapid development of global digital economy and the increasing demand for network security, high-quality random numbers play an increasingly important role in cryptography, secure communication, simulation and other fields.

[0003] Traditional random number generation techniques include pseudo-random number generators based on mathematical algorithms and classical physical random number generators based on physical noise sources. Although these techniques have been widely used in the past, they each have certain limitations. Among them, random number generation based on mathematical algorithms is essentially predictable, while random number generation based on physical noise sources may be affected by environmental factors, making long-term stability difficult to guarantee and the rate difficult to achieve high performance requirements.

[0004] Quantum random number generators are based on quantum effects and can theoretically achieve true random number generation, distinguishing them from pseudo-random number generators and classical physical random number generators. Quantum random number generators have unpredictable characteristics and higher security. For example, the existing technology, Chinese patent CN206209694U, published on May 31, 2017, provides a quantum random number generator that can ensure that the source contains sufficient quantum randomness, thus ensuring the true randomness of the generated random numbers.

[0005] However, the random number generation rate of existing quantum random number generators is not high enough, and the generation rate cannot be flexibly adjusted. SUMMARY

[0006] The utility model discloses in order to solve the problem that the random number generation rate of existing quantum random number generator cannot be flexibly adjusted, and proposes a kind of adjustable rate quantum random number generator.

[0007] To achieve the above purpose, the technical solutions adopted by the utility model are as follows:

[0008] An adjustable rate quantum random number generator includes a quantum light source, a light flux adjustment module, a detection module, and a post-processing module.

[0009] The output end of the quantum light source and the output end of the post-processing module are respectively connected to the input end of the light flux adjustment module, the output end of the light flux adjustment module is connected to the input end of the detection module, and the output end of the detection module is connected to the input end of the post-processing module.

[0010] In the scheme, the light flux adjusting module is triggered by the post-processing module, the light flux between the quantum light source and the detection module can be dynamically controlled, so that flexible management of the random number generation rate is realized, and meanwhile, energy consumption can be reduced and waste of data resources can be avoided.

[0011] Preferably, the quantum light source is a laser.

[0012] Preferably, the light flux adjusting module comprises an electrochromic device and a D / A converter.

[0013] The output end of the quantum light source is connected with the input end of the detection module through the electrochromic device, and the output end of the post-processing module is connected with the input end of the electrochromic device through the D / A converter.

[0014] Preferably, the electrochromic device is an electrochromic lens.

[0015] Preferably, the model of the D / A converter is DAC8771.

[0016] Preferably, the detection module comprises an attenuator and a single-photon detector.

[0017] The output end of the quantum light source is connected with the input end of the attenuator through the electrochromic device, the output end of the attenuator is connected with the input end of the single-photon detector, and the output end of the single-photon detector is connected with the input end of the post-processing module.

[0018] Preferably, the quantum light source is at least two.

[0019] Preferably, the number of the light flux adjusting modules corresponds to the number of the quantum light sources.

[0020] Preferably, the number of the detection modules corresponds to the number of the quantum light sources.

[0021] Preferably, the post-processing module is an FPGA.

[0022] The utility model discloses beneficial technical effects:

[0023] The utility model discloses a quantum random number generator of adjustable rate, through post -processing module trigger light flux adjusting module, the light flux between quantum light source to detection module can be dynamically controlled to realize the flexible management to random number generation rate, and simultaneously can reduce energy consumption and avoid the waste of data resources. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is the module connection schematic drawing of one embodiment of the utility model;

[0025] Figure 2 It is the module connection schematic drawing of another embodiment of the utility model;

[0026] Wherein: 1, quantum light source; 2, light flux adjusting module; 21, electrochromic device; 22, D / A converter; 3, detection module; 31, attenuator; 32, single photon detector; 4, post-processing module. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further detailed with examples, but the scope of protection of the utility model is not limited to the following specific examples.

[0028] Example 1

[0029] As Figure 1 shown, a quantum random number generator with adjustable rate includes quantum light source 1, light flux adjusting module 2, detection module 3 and post-processing module 4.

[0030] The output end of the quantum light source 1 and the output end of the post-processing module 4 are connected with the input end of the light flux adjusting module 2 respectively, the output end of the light flux adjusting module 2 is connected with the input end of the detection module 3, and the output end of the detection module 3 is connected with the input end of the post-processing module 4.

[0031] In the specific implementation process, the light flux between the quantum light source 1 and the detection module 3 can be dynamically controlled by triggering the light flux adjusting module 2 through the post-processing module 4, so as to realize flexible management of the random number generation rate; at the same time, energy consumption can be reduced and waste of data resources can be avoided.

[0032] Example 2

[0033] A quantum random number generator with adjustable rate includes quantum light source 1, light flux adjusting module 2, detection module 3 and post-processing module 4.

[0034] More specifically, the quantum light source 1 is a laser.

[0035] More specifically, the light flux adjusting module 2 includes electrochromic device 21 and D / A converter 22.

[0036] The output end of the quantum light source 1 is connected with the input end of the detection module 3 through the electrochromic device 21, and the output end of the post-processing module 4 is connected with the input end of the electrochromic device 21 through the D / A converter 22.

[0037] More specifically, the electrochromic device 21 is an electrochromic lens.

[0038] More specifically, the model of the D / A converter 22 is DAC8771.

[0039] More specifically, the detection module 3 comprises an attenuator 31 and a single photon detector 32.

[0040] The output end of the quantum light source 1 is connected with the input end of the attenuator 31 through the electrochromic device 21, the output end of the attenuator 31 is connected with the input end of the single photon detector 32, and the output end of the single photon detector 32 is connected with the input end of the post-processing module 4.

[0041] More specifically, the post-processing module 4 is an FPGA.

[0042] In the specific implementation process, the FPGA sends a digital signal to the D / A converter 22, and the D / A converter 22 converts the digital signal into an analog voltage (0-5V) to regulate the light transmittance of the electrochromic lens, and dynamically control the light flux between the quantum light source 1 and the single photon detector 32, so as to realize flexible management of the random number generation rate.

[0043] When the output voltage of the D / A converter 22 is 0V, the electrochromic lens is in a transparent state, and the light transmittance can reach 90%. This is because when there is no external voltage, the material structure inside the electrochromic lens makes it less absorb and scatter light, and the light can pass through more smoothly, thereby realizing a higher light transmittance.

[0044] As the output voltage of the D / A converter 22 gradually increases, when it reaches 5V, the electrochromic lens is in a colored state, and the light transmittance is reduced to 30%. This is because the external voltage changes the electronic structure and energy level distribution of the material inside the electrochromic lens, resulting in an increase in its light absorption capacity, which reduces the light transmittance. The color depth of the electrochromic lens is positively correlated with the voltage, that is, the higher the voltage, the deeper the color, and the lower the light transmittance. The optical modulation amplitude formula of the electrochromic lens is ΔT=T b -T c (Where ΔT is the optical modulation amplitude, T b is the transparent state light transmittance, and T c is the colored state light transmittance), and the optical modulation amplitude is 60%. Through this formula, the change range of the light transmittance can be quantified, and then the adjustment degree of the light flux is reflected, and finally the flexible adjustment of the random number generation rate is realized.

[0045] The post-processing module 4 (FPGA) outputs different digital signals to the D / A converter 22 according to actual needs, thereby accurately controlling the voltage of the electrochromic lens, dynamically regulating the light flux between the quantum light source 1 and the detection module 3, and achieving flexible management of the random number generation rate, while reducing energy consumption and avoiding waste of data resources.

[0046] In the specific implementation process, when it is necessary to save power resources or data resources, the color of the electrochromic lens is deepened by the FPGA control, the number of photons entering the single photon detector 32 is reduced, and the power consumption of the single photon detector 32 and the random number data rate of the final output are reduced. On the contrary, in the case of high performance, the electrochromic lens can be quickly switched to a full transparent mode by the FPGA control to ensure the maximum light flux and random number generation efficiency. Not only does it improve the energy efficiency ratio of the system and prolong the service life of the equipment, but also provides users with a more flexible operation experience.

[0047] Embodiment 3

[0048] As Figure 2 shown, a variable rate quantum random number generator is basically the same as embodiment 2, the difference is that:

[0049] More specifically, the quantum light source 1 has at least two.

[0050] More specifically, the number of light flux adjustment modules 2 corresponds to the number of quantum light sources 1.

[0051] More specifically, the number of detection modules 3 corresponds to the number of quantum light sources 1.

[0052] In the specific implementation process, by introducing the parallel structure of multiple quantum light sources 1, light flux adjustment modules 2 and detection modules 3, the generation speed of random numbers is significantly improved, not only the throughput of the system is increased, but also the quality of random numbers generated by each channel is guaranteed.

[0053] According to the disclosure and teaching of the above description, those skilled in the art of the present application can also change and modify the above embodiments. Therefore, the present application is not limited to the specific embodiments disclosed and described above, and some modifications and changes of the application should fall within the protection scope of the claims of the present application. In addition, although some specific terms are used in the specification, these terms are only for convenience and do not constitute any limitation on the present application.

Claims

1. A rate-tunable quantum random number generator, characterized in that, The quantum light source, the light flux adjusting module, the detection module and the post-processing module are included. The output end of the quantum light source and the output end of the post-processing module are connected with the input end of the light flux adjusting module respectively, the output end of the light flux adjusting module is connected with the input end of the detection module, and the output end of the detection module is connected with the input end of the post-processing module.

2. A variable rate quantum random number generator according to claim 1, wherein, The quantum light source is a laser.

3. A variable rate quantum random number generator according to claim 1, wherein, The light flux adjusting module includes an electrochromic device and a D / A converter. The output end of the quantum light source is connected with the input end of the detection module through the electrochromic device, and the output end of the post-processing module is connected with the input end of the electrochromic device through the D / A converter.

4. A variable rate quantum random number generator according to claim 3, wherein, The electrochromic device is an electrochromic lens.

5. A variable rate quantum random number generator according to claim 3, wherein, The model of the D / A converter is DAC8771.

6. A variable rate quantum random number generator according to claim 3, wherein, The detection module includes an attenuator and a single photon detector. The output end of the quantum light source is connected with the input end of the attenuator through the electrochromic device, the output end of the attenuator is connected with the input end of the single photon detector, and the output end of the single photon detector is connected with the input end of the post-processing module.

7. The adjustable rate quantum random number generator of claim 1, wherein, The quantum light source is at least two.

8. A variable rate quantum random number generator according to claim 7, wherein, The number of the light flux adjusting modules corresponds to the number of the quantum light sources.

9. A variable rate quantum random number generator according to claim 7, wherein, The number of the detection modules corresponds to the number of the quantum light sources.

10. The adjustable rate quantum random number generator of claim 1, wherein, The post-processing module is an FPGA.

Images