基于弱值的最佳量子态断层扫描

IF 4.6 2区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY

Chinese Journal of Physics Pub Date : 2025-07-21 DOI:10.1016/j.cjph.2025.07.009

Xuanmin Zhu , Dezheng Zhang , Runping Gao , Huan Wang , Zijiang Luo , Qun Wei

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引用次数: 0

摘要

为了通过弱值提高状态层析策略的效率，我们在被测量子系统和测量设备之间寻找最优测量强度。对于任意d维量子系统，得到了密度矩阵实部和虚部测量的最佳测量强度。利用均方误差对状态层析成像的最优效率进行了研究。导出了重构密度矩阵的最小均方误差。本文所研究的状态层析策略在未知量子态的测量中可能是有用的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Optimal quantum-state tomography via weak value

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Optimal quantum-state tomography via weak value

To improve the efficiency of the state-tomography strategy via weak value, we have searched for the optimal measurement strength between the quantum system being measured and the measuring device. For an arbitrary

d

-dimensional quantum system, the optimal measurement strengths used in measuring the real and imaginary parts of the density matrix are obtained. The optimal efficiency of the state tomography has also been studied by using the mean-square error. The minimum mean-square error of the reconstructed density matrix has been derived. The state-tomography strategy studied in this article may be useful in the measurement of the unknown quantum state.

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来源期刊

Chinese Journal of Physics 物理-物理：综合

CiteScore

8.50

自引率

10.00%

发文量

361

审稿时长

44 days

期刊介绍： The Chinese Journal of Physics publishes important advances in various branches in physics, including statistical and biophysical physics, condensed matter physics, atomic/molecular physics, optics, particle physics and nuclear physics. The editors welcome manuscripts on: -General Physics: Statistical and Quantum Mechanics, etc.- Gravitation and Astrophysics- Elementary Particles and Fields- Nuclear Physics- Atomic, Molecular, and Optical Physics- Quantum Information and Quantum Computation- Fluid Dynamics, Nonlinear Dynamics, Chaos, and Complex Networks- Plasma and Beam Physics- Condensed Matter: Structure, etc.- Condensed Matter: Electronic Properties, etc.- Polymer, Soft Matter, Biological, and Interdisciplinary Physics. CJP publishes regular research papers, feature articles and review papers.