Method for optimizing quantum information transmission channel

Abstract

Provided is a method for optimizing a quantum information transmission channel. The method comprises the first step of analyzing evolution dynamics of operator particles at an output end in a Heisenberg scenic painting to obtain a direct relation among fidelity of quantum information transmission with bonding force among particles in the channel, applied magnetic field intensity, the number of particles in the channel and system initial states, and adopting the direct relation as a formula (1); the second step of determining the number of the particles in the channel according to the length of the channel, endowing the bonding force and the applied magnetic field intensity with random fixed values, comparing the fidelities obtained through calculating according to the formula (1) under all the possible channel initial states, and selecting the channel initial state which corresponds to the fidelity with the biggest numerical value as a selected channel initial state. According to the method for optimizing the quantum information transmission channel, the fidelities obtained through calculating under all the possible channel initial states can be compared, the channel initial state which corresponds to the fidelity with the biggest numerical value is selected to be the selected channel initial state, the limitation of the initial states is broken through, and the optimizing effect of the quantum channel is better.

Description

technical field [0001] The invention relates to the field of quantum mechanics, in particular to a method for optimizing quantum information transmission channels. Background technique [0002] With the rapid development of information technology, the classic Moore's Law will eventually reach its limit, and it will be carried by quantum information technology. One of the ultimate goals of quantum information science research is to realize quantum computers. Based on the superposition and coherence of quantum states in quantum mechanics, quantum computers have information computing and processing capabilities that classical computers cannot surpass. In February 2007, Canada's D-Wave Systems Corporation announced the successful development of a 16-qubit superconducting quantum computer. However, due to the small number of qubits and short coherence time, its role is limited to solving some optimization problems. Therefore, to truly perform large-scale quantum information pro...

AI Technical Summary

Problems solved by technology

In the prior art, in order to facilitate the acquisition of fidelity, the initial state of the spin particles in the channel is fixed, and the quantum channel is only optimized by adjusting the coupling parameters and the strength of the external magnetic field. Based on the limitations of the initial state, the effect of optimizing the quantum channel is not enough ideal

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