基于量子层析的量子态测量方案及其仿真

Quantum state measurement based on quantum tomography and its simulation

为解决量子态信息获取问题,基于量子层析理论,深入分析了单量子比特和多量子比特的层析理论,设计了利用量子态层析进行量子态测量的实验方案,并通过计算机仿真技术对单量子比特层析实验进行了模拟.在理论分析和仿真实验的基础上得到如下结论:通过适当选取测量次数,量子层析技术可以较为精确地重构量子态密度矩阵,获取量子态信息,同时可以兼顾实验效率.

In order to solve the problem of information acquisition of quantum state, based on the quantum tomography theory, the single-qubit and multi-qubits tomography techniques are analyzed in details and an experiment for quantum state measurement is designed. Then the practicability of this method is verified by the simulation for single-qubit tomography with computer simulation technology. Simulation results show that not only the density matrix can be reconstructed and the information of quantum state can be obtained, but also the efficiency of experiment is satisfying, when suitable measurement times are chosen in quantum tomography experiment.