Calculation method for coding error rate of quantum key generation system
A technology for generating systems and calculation methods, applied in transmission systems, digital transmission systems, electromagnetic wave transmission systems, etc., can solve problems such as large estimated phase error rate, complex calculation formula, and lower security code rate, and improve the code rate. , the calculation method is simple, and the estimated value is compact
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Embodiment 1
[0037] Step 1: The sender and receiver of quantum key distribution prepare and measure the quantum state respectively according to the three-state protocol of four transmissions and three receptions;
[0038] Step 2: The sender and the receiver perform base vector comparison through the open channel;
[0039] Step 3: The sender and the receiver perform error correction to obtain the bit error rate measured by the receiver using the Z base vector
[0040]
[0041] Among them, E z It is the bit error rate measured by the Z base vector at the receiving side, which can be directly obtained by actual measurement.
[0042] Step 4: Calculate the phase error rate measured by the receiver using the Z-basis vector
[0043]
[0044] Among them, Y -,+ The quantum state |-> is prepared for the sender using the X basis vector, and the yield obtained by the receiver using the X basis vector to measure the quantum state |+> can be measured in real time during communication. Y +...
Embodiment 2
[0055] Step 1: The sender of the quantum key distribution prepares the quantum states according to the communication protocol of no less than four quantum states, and the four quantum states are prepared strictly according to the three-state protocol of four transmissions and three receptions. The receiver measures each quantum state sent by the sender according to the three-state protocol of four transmissions and three receptions. The four quantum states prepared by the sender according to the three-state protocol of four transmissions and three receptions are strictly in accordance with the three state protocol to measure it;
[0056] Step 2: The sender and the receiver perform base vector comparison through the open channel;
[0057] Step 3: The sender and the receiver perform error correction to obtain the bit error rate measured by the receiver using the Z base vector
[0058]
[0059] Among them, E z It is the bit error rate measured by the Z base vector at the r...
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