A quantum optical experiment simulation demonstration system and a simulation demonstration method

Abstract

The present invention relates to quantum optical experiments, and particularly to a quantum optical experiment simulation demonstration system and a simulation demonstration method. A quantum device module, taking an electronics module as an entity, simulates a quantum light source device, a quantum logic gate device, and a quantum measurement device in a quantum optical experiment. Each device sequentially transmits its own status information and position data to the downstream device, and finally sends them to the device at the end of the quantum circuit for summarization. The device at the end of the quantum circuit sends the status sequence data of the electronics module to the host computer software processing center through a WiFi communication module, and receives the measurement results returned by the host computer software processing center through the WiFi communication module for display. The technical solution provided by the present invention can effectively overcome the defect of the prior art that it is impossible to bring a good experimental operation experience to users under the conditions of ensuring safety, low cost, and low implementation complexity.

Description

Technical Field

[0001] The present invention relates to quantum optical experiments, and particularly to a quantum optical experiment simulation and demonstration system and a simulation and demonstration method thereof. Background Art

[0002] Quantum information, based on the principles of quantum mechanics, explores new paradigms for information processing by leveraging unique properties such as superposition and entanglement of quantum states. Since the 1980s, after Feynman et al. proposed the concept of quantum computing, Peter Shor proposed the Shor algorithm for factoring large numbers into prime factors, demonstrating the potential advantages of quantum computing over traditional computing. After the first quantum key distribution protocol was proposed in 1984, the field of quantum information has developed rapidly.

[0003] Currently, quantum information is in a critical period of transitioning from the laboratory to industrialization, and is expected to bring disruptive innovations in aspects such as ensuring information security, accelerating data processing, and enhancing detection capabilities. Both domestic and international communities are paying increasing attention to the field of quantum information, which is also one of the new generation of information technologies that China is focusing on developing. At the same time, as a strategic emerging field, the demand for talents in quantum information is becoming increasingly urgent. However, as an emerging technology, quantum information is still relatively unfamiliar to primary and secondary school students and the general public. In order to enhance public awareness, there have been more and more popular science activities on quantum information in recent years.

[0004] Quantum information is an interdisciplinary subject that combines physics, mathematics, and computer science. Currently, it has spawned multiple application directions with industrialization potential. However, due to the relatively abstract and obscure theoretical knowledge of quantum information, it is difficult for students or audiences to understand solely through theoretical explanations, and it is difficult to ensure the teaching and popular science effects. Moreover, it is difficult for the general public and students to access and understand the basic concepts and fundamental experiments of quantum information, and there is a need for relevant practical platforms that can cooperate with theories and have the characteristics of being demonstrable, operable, and interactive.

[0005] Currently, in the field of popular science and teaching demonstrations of quantum information, there are mainly two types of product forms. One is virtual simulation experiment software written entirely using computer software, and the other is physical experiment teaching devices built entirely with real physical devices. The virtual simulation experiment software has weak interactivity, cannot provide sufficient operation experience, and is not convenient for operating the devices. The physical experiment teaching devices have unsafe factors such as strong light and strong electricity, and are also costly. For example, high-end quantum hardware (such as superconducting quantum computers, quantum secure communication systems, etc.) is expensive. Secondly, the implementation complexity is high. Some systems require an extremely low temperature environment and high-precision control, with a high operation threshold and relatively demanding requirements for the experimental environment, making it difficult to maintain. Summary of the Invention

[0006] (I) Technical Problems to be Solved

[0007] In view of the above-mentioned drawbacks of the prior art, the present invention provides a quantum optical experiment simulation and demonstration system and a simulation and demonstration method, which can effectively overcome the defect of the prior art that it is impossible to bring a good experimental operation experience to users under the conditions of ensuring safety, low cost, and low implementation complexity.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, the present invention is realized through the following technical solutions:

[0010] A quantum optical experiment simulation and demonstration system includes a quantum device module, a host computer software processing center, and a WiFi communication module;

[0011] The quantum device module uses an electronics module as an entity to simulate quantum light source devices, quantum logic gate devices, and quantum measurement devices in a quantum optical experiment. Each device sequentially transmits its own state information and position data to downstream devices, and finally sends them to the device at the end of the quantum circuit for summarization. The device at the end of the quantum circuit sends the state sequence data of the electronics module to the host computer software processing center through the WiFi communication module, and receives the measurement results returned by the host computer software processing center through the WiFi communication module for display;

[0012] The host computer software processing center receives the state sequence data of the electronics module sent by the device at the end of the quantum circuit through the WiFi communication module, queries the built-in truth table database, and sends the corresponding measurement results to the quantum measurement device through the WiFi communication module and synchronously displays the measurement results.

[0013] Preferably, the quantum device modules are topologically connected by HDMI cables to form a quantum circuit that completes the function of processing specific quantum information;

[0014] Among them, each quantum device module is powered by inserting an external power supply module.

[0015] Preferably, a selection switch and a corresponding status indicator light are provided on both the quantum light source device and the quantum logic gate device for users to select the device status and display their own status information;

[0016] An LED indicator light or a display screen is provided on the quantum measurement device for displaying the measurement results returned by the host computer software processing center.

[0017] Preferably, the quantum logic gate devices include Hadamard gate devices, controlled-NOT gate devices, classical controlled-X gates, and classical controlled-Z gates.

[0018] Preferably, a truth table that completely corresponds to the status information and connection methods of different quantum device modules is stored in the truth table database built into the host computer software processing center.

[0019] Preferably, the host computer software processing center includes a toolbar, a display device area, and a display operation result area;

[0020] The toolbar includes operation, reset, full-screen display, text note, and help buttons;

[0021] The display device area displays different quantum circuits, where each icon corresponds to an electronics module one by one. Clicking on the icon can display the quantum light source device, quantum logic gate device, or quantum measurement device represented by the electronics module, and the status information of each quantum device module can be controlled through the software;

[0022] The display operation result area displays the status sequence data of the electronics module and its corresponding measurement results.

[0023] Preferably, the WiFi communication module is a daughter board on the PCB, and the WiFi communication module is inserted into the quantum device module at the end of the quantum circuit and the host computer.

[0024] A method for simulating and demonstrating quantum optical experiments includes the following steps:

[0025] S1. Determine the corresponding quantum circuit according to the quantum information processing function, and use the corresponding quantum device modules to connect to obtain the quantum circuit;

[0026] S2. Set the status of each device, and each device sequentially transmits its own status information and position data to the downstream device, and finally sends it to the device at the end of the quantum circuit for summary;

[0027] S3. The device at the end of the quantum circuit sends the status sequence data of the electronics module to the host computer software processing center through the WiFi communication module;

[0028] S4. The host computer software processing center receives the status sequence data through the WiFi communication module, queries the built-in truth table database, sends the corresponding measurement results to the quantum measurement device through the WiFi communication module, and synchronously displays the measurement results;

[0029] S5. The device at the end of the quantum circuit receives the measurement results returned by the host computer software processing center through the WiFi communication module and displays them.

[0030] Preferably, the quantum device modules are topologically connected through HDMI cables to form a quantum circuit that completes the function of processing specific quantum information;

[0031] Among them, each quantum device module is powered by inserting an external power supply module.

[0032] The quantum device module includes a quantum light source device, a quantum logic gate device, and a quantum measurement device. Selection switches and corresponding status indicators are provided on both the quantum light source device and the quantum logic gate device for users to select the device status and display their own status information.

[0033] An LED indicator or a display screen is provided on the quantum measurement device for displaying the measurement results returned by the host computer software processing center.

[0034] Preferably, a truth table that is exactly corresponding to the status information and connection methods of different quantum device modules is stored in the truth table database built in the host computer software processing center.

[0035] (III) Beneficial Effects

[0036] Compared with the prior art, a quantum optical experiment simulation and demonstration system and a simulation and demonstration method provided by the present invention complete the simulation and demonstration of quantum optical experiments through the combination of an electronics module and software. A truth table that is exactly corresponding to the status information and connection methods of different quantum device modules is built in. Since only the electronics module and software are used, the present invention has the advantages of high safety, low cost, low implementation complexity, combinability, easy operation, etc., and is suitable for large-scale popularization and application in quantum information education, public science popularization, and exhibition demonstrations. Compared with physical experimental teaching devices, the requirements for experimenters are reduced, so that a highly interactive experimental operation experience can be obtained, making abstract quantum theory concepts concrete and deepening the understanding of complex quantum optical concepts.

[0037] A quantum optical experiment simulation and demonstration system and a simulation and demonstration method provided by the present invention can support theoretical research and educational applications, and can effectively eliminate resource limitations while ensuring teaching quality, opening up an efficient and economical intermediate path for quantum information science education. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings without creative efforts based on these drawings.

[0039] Figure 1 It is a schematic diagram of the system and process of the present invention;

[0040] Figure 2This is a schematic diagram of the structure in which quantum device modules in the present invention form a quantum circuit through topological connection;

[0041] Figure 3 This is a schematic diagram of the quantum circuit for quantum teleportation in the present invention;

[0042] Figure 4 This is a schematic diagram of the quantum circuit for the BB84 quantum key distribution experiment in the present invention. Specific embodiments

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0044] A quantum optical experiment simulation and demonstration system, as Figure 1 shown, includes a quantum device module, a host computer software processing center, and a WiFi communication module;

[0045] The quantum device module uses an electronics module as an entity to simulate quantum light source devices, quantum logic gate devices, and quantum measurement devices in quantum optical experiments. Each device sequentially transmits its own state information and position data to downstream devices, and finally sends them to the device at the end of the quantum circuit for summarization. The device at the end of the quantum circuit sends the state sequence data of the electronics module to the host computer software processing center through the WiFi communication module, and receives the measurement results returned by the host computer software processing center through the WiFi communication module for display;

[0046] The host computer software processing center receives the state sequence data of the electronics module sent by the device at the end of the quantum circuit through the WiFi communication module, queries the built-in truth table database, and sends the corresponding measurement results to the quantum measurement device through the WiFi communication module and synchronously displays the measurement results.

[0047] In the technical solution of this application, the WiFi communication module is a daughter board on the PCB, and the WiFi communication module is inserted into the quantum device module at the end of the quantum circuit and the host computer.

[0048] The quantum device modules are topologically connected through HDMI cables to form a quantum circuit that completes the function of processing specific quantum information;

[0049] Among them, each quantum device module is powered by inserting an external power module.

[0050] Both the quantum light source device and the quantum logic gate device are equipped with selection switches and corresponding status indicators for users to select the device status and display their own status information;

[0051] The quantum measurement device is equipped with an LED indicator or a display screen for displaying the measurement results returned by the host computer software processing center.

[0052] The quantum logic gate device includes a Hadamard gate device, a controlled NOT gate device, a classical controlled-X gate, and a classical controlled-Z gate.

[0053] In the technical solution of this application, the quantum device modules and their corresponding physical meanings are shown in the following table:

[0054] Table 1 Quantum Device Module Description Table

[0055]

[0056]

[0057] Analogous to classical digital circuits, the functional circuit for processing specific quantum information is usually called a quantum circuit. Many concepts and principles in quantum information can be mapped to quantum circuits, such as quantum key distribution and quantum teleportation in quantum optics. In a quantum circuit, after the quantum initial state passes through a unitary evolution route composed of a series of quantum logic gate devices, a measurement operator is used for measurement to obtain the measurement result. The quantum initial state, unitary evolution route, and measurement operations of these quantum circuits can all be realized by the quantum light source device, quantum logic gate device, and quantum measurement device composed of electronic modules. The quantum device modules are topologically connected through HDMI cables to form a quantum circuit for processing specific quantum information functional circuits, and one of the topological connection methods is as Figure 2 shown.

[0058] The host computer software processing center has a truth table stored in its built-in truth table database that is exactly corresponding to the status information and connection methods of different quantum device modules.

[0059] The host computer software processing center includes a toolbar, a display device area, and a display operation result area;

[0060] The toolbar includes operation, reset, full-screen display, text note, and help buttons;

[0061] The display device area displays different quantum circuits, where each icon corresponds to an electronic module one by one. Clicking on the icon can display the quantum light source device, quantum logic gate device, or quantum measurement device represented by the electronic module, and the status information of each quantum device module can be controlled through the software;

[0062] A display area for operation results is provided to display the status sequence data of the electronics module and its corresponding measurement results.

[0063] For quantum optical experiments, since each quantum device module only needs to display different states such as |0> and |1> or different logic gates, and environmental noise and state fidelity are not involved, the truth table method of classical digital circuits can be borrowed. A truth table that completely corresponds to the state information and connection method of different quantum device modules is pre-built in the host computer software processing center, and the truth table database is placed in the host computer software processing center. After the user completes the connection of the quantum circuit, for different input states, the corresponding measurement results can be obtained by querying the truth table database, which can save calculation time, have lower hardware requirements for the electronics module, and can display the measurement results in real time, reducing costs without affecting the teaching display effect.

[0064] In the technical solution of this application, the host computer software processing center can be a mobile terminal with a WiFi communication module and installed software, and the software is connected to the WiFi communication module through a hardware circuit.

[0065] Based on the above quantum optical experiment simulation demonstration system, the present invention also discloses a quantum optical experiment simulation demonstration method, as Figure 1 shown, including the following steps:

[0066] S1. Determine the corresponding quantum circuit according to the quantum information processing function, and use the corresponding quantum device modules to connect to obtain the quantum circuit;

[0067] S2. Set the states of each device, and each device sequentially transmits its own state information and position data to the downstream device, and finally sends them to the device at the end of the quantum circuit for summarization;

[0068] S3. The device at the end of the quantum circuit sends the status sequence data of the electronics module to the host computer software processing center through the WiFi communication module;

[0069] S4. The host computer software processing center receives the status sequence data through the WiFi communication module, queries the built-in truth table database, and sends the corresponding measurement results to the quantum measurement device through the WiFi communication module and synchronously displays the measurement results;

[0070] S5. The device at the end of the quantum circuit receives the measurement results returned by the host computer software processing center through the WiFi communication module and displays them.

[0071] The quantum device modules are topologically connected by HDMI cables to form a quantum circuit that completes the function of processing specific quantum information;

[0072] Among them, each quantum device module is powered by inserting an external power module.

[0073] The quantum device module includes a quantum light source device, a quantum logic gate device, and a quantum measurement device. Selection switches and corresponding status indicators are provided on both the quantum light source device and the quantum logic gate device for users to select the device status and display their own status information.

[0074] An LED indicator or a display screen is provided on the quantum measurement device to display the measurement results returned by the host computer software processing center.

[0075] A truth table database is built into the host computer software processing center, which stores a truth table that exactly corresponds to the status information and connection methods of different quantum device modules.

[0076] The technical solution of this application aims at the deficiencies of the existing two major product forms. By combining an electronics module with software, a quantum optical experiment simulation demonstration system is formed to simulate qubit operations, display the quantum superposition and unitary evolution processes, and is equipped with interactive tutorials and experimental designs to guide learners to gradually explore quantum gate operations, so as to realize the simulation display of the quantum initial state, quantum logic gate operations, and quantum measurement results in quantum information experiments, helping learners better understand abstract quantum optical concepts, and having the advantages of high security, low cost, low implementation complexity, combinability, and easy operation.

[0077] To better illustrate the technical solution of this application, a specific case - quantum teleportation is given below. It is an important concept in the teaching of quantum information and quantum optics. Quantum teleportation can reconstruct any unknown quantum state of a real particle at different locations without actually transmitting the particle.

[0078] Therefore, using the above-mentioned quantum device modules, they are topologically connected through HDMI cables to form corresponding quantum circuits, as Figure 3 shown. If the quantum teleportation function is executed, the specific switch of the middle quantum logic gate should be selected. The first row of the quantum circuit is the #1 particle, the second row is the #2 particle, and the third row is the #3 particle. For example, if the quantum light source device of the #1 particle at the Alice end is set to 0 before transmission, and the Hadamard gate device of the #1 particle at the Alice end is set to the H gate, then the quantum state transmitted by the #1 particle at the Alice end can be obtained as

[0079] The quantum light source device of the #2 particle at the Alice end is set to 0, and the Hadamard gate device of the #2 particle at the Alice end is set to the H gate. After passing through the Hadamard gate device, the state of the #2 particle is

[0080]

[0081] The input bit of the #3 particle at the Bob end is 0, and the quantum state of the #2 particle at the Alice end and the #3 particle at the Bob end after passing through the controlled NOT gate is as follows:

[0082]

[0083] Thus, the quantum state evolution of the next quantum logic gate can be obtained:

[0084] Table 2 Quantum state evolution of quantum logic gates

[0085]

[0086]

[0087] From the above table, the following truth table can be obtained:

[0088] Table 3 Truth table of quantum teleportation

[0089]

[0090] From Figure 3 It can be seen from the shown quantum circuit that among the quantum logic gate devices included, there are a total of 7 with selection switches (3 quantum light source devices and 4 Hadamard gate devices). Therefore, if any situation is traversed, there are a total of 128 situations. Similar to the above analysis process, the truth tables of the remaining 120 situations can be listed to obtain a complete truth table database.

[0091] After listing all the truth tables, the truth table database can be placed into the upper computer software processing center. For the hardware, according to the status information of each quantum logic gate device in the quantum circuit connected each time, through WiFi communication, the corresponding truth table can be queried in the upper computer software processing center. According to the truth table, the corresponding measurement results can be read. Through WiFi communication, the software and hardware can synchronously display the measurement results. This can save calculation time, have lower hardware requirements for the electronics module, and can display the measurement results in real time, reducing costs without affecting the teaching display effect.

[0092] According to the technical solution of this application, other quantum information experiments can be designed, such as the BB84 quantum key distribution experiment. Its quantum circuit is as Figure 4 shown, and the corresponding truth table is as follows:

[0093] Table 4 Truth table of BB84 quantum key distribution experiment

[0094] Light source Hadmard gate (left) Hadmard gate (right) Measurement result 0 I I 0 1 I I 1 0 H I 01011001… 1 H I 01011001… 0 I H 01011001… 1 I H 01011001… 0 H H 0 1 H H 1

[0095] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A quantum optical experiment simulation demonstration system, characterized in that: It includes quantum device module, host computer software processing center and WiFi communication module; The quantum device module uses the electronics module as an entity to simulate the quantum light source device, quantum logic gate device, and quantum measurement device in the quantum optical experiment. Each device transmits its own state information and position data to the downstream device in turn, and finally sends it to the device at the end of the quantum circuit for aggregation. The device at the end of the quantum circuit sends the state sequence data of the electronics module to the host computer software processing center through the WiFi communication module, and receives the measurement results returned by the host computer software processing center through the WiFi communication module for display; The upper computer software processing center receives the state sequence data of the electronics module sent by the device at the end of the quantum circuit through the WiFi communication module, queries the built-in truth table database, sends the corresponding measurement results to the quantum measurement device through the WiFi communication module, and displays the measurement results synchronously; The quantum device modules are topologically connected via HDMI lines to form a quantum circuit that completes the functional circuit for processing quantum information; Among them, each quantum device module is powered by inserting an external power supply module; The quantum light source device and quantum logic gate device are both provided with a selection switch and a corresponding status indicator light for the user to select the device state and display their own status information; The quantum measurement device is provided with an LED indicator light or a display screen for displaying the measurement results returned by the host computer software processing center; The host computer software processing center includes a toolbar, a display device area and an operation result display area; Toolbar, including Run, Reset, Full Screen, Text Notes, and Help buttons; The device display area displays different quantum circuits, where each icon corresponds to an electronics module. Clicking the icon can display the quantum light source device, quantum logic gate device, or quantum measurement device represented by the electronics module, and the status information of each quantum device module can be controlled by software; Display operation result area, showing the status sequence data of the electronics module and its corresponding measurement results; The built-in truth table database of the host computer software processing center stores a truth table that completely corresponds to the state information and connection modes of different quantum device modules.

2. The quantum optical experiment simulation demonstration system according to claim 1, characterized in that: The quantum logic gate devices include Hadamard gate devices, controlled NOT gate devices, classical controlled X gates and classical controlled Z gates.

3. The quantum optical experiment simulation demonstration system according to claim 1, characterized in that: The WiFi communication module is a sub-board on the PCB, and the WiFi communication module is inserted into the quantum device module at the end of the quantum circuit and the host computer.

4. A quantum optical experiment simulation demonstration method, applied to the quantum optical experiment simulation demonstration system according to claim 1, characterized in that: The following steps are involved: S1. Determine the corresponding quantum circuit according to the quantum information processing function, and connect the corresponding quantum device modules to obtain the quantum circuit; S2. Set the status of each device. Each device transmits its status information and position data to the downstream device in turn, and finally sends it to the device at the end of the quantum circuit for aggregation; S3, the device at the end of the quantum circuit sends the state sequence data of the electronics module to the upper computer software processing center through the WiFi communication module; S4, the upper computer software processing center receives the state sequence data through the WiFi communication module, queries the built-in truth table database, sends the corresponding measurement results to the quantum measurement device through the WiFi communication module, and displays the measurement results synchronously; S5. The device at the end of the quantum circuit receives the measurement results returned by the host computer software processing center through the WiFi communication module and displays them.

5. The quantum optical experiment simulation demonstration method according to claim 4, characterized in that: The quantum device modules are topologically connected via HDMI lines to form a quantum circuit that completes the functional circuit for processing quantum information; Among them, each quantum device module is powered by inserting an external power supply module; The quantum device module includes a quantum light source device, a quantum logic gate device and a quantum measurement device. The quantum light source device and the quantum logic gate device are both provided with a selection switch and a corresponding status indicator light for the user to select the device state and display their own status information; The quantum measurement device is provided with an LED indicator light or a display screen for displaying the measurement results returned by the host computer software processing center.

6. The quantum optical experiment simulation demonstration method according to claim 4, characterized in that: The built-in truth table database of the host computer software processing center stores a truth table that completely corresponds to the state information and connection modes of different quantum device modules.

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