Extracting Bayesian networks from multiple copies of a quantum system

IF 1.8 4区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY

EPL Pub Date : 2023-12-20 DOI:10.1209/0295-5075/ad177d

Kaonan Micadei, Gabriel T. Landi, Eric Lutz

引用次数: 0

Abstract Despite their theoretical importance, dynamic Bayesian networks associated with quantum processes are currently not accessible experimentally. We here describe a general scheme to determine the multi-time path probability of a Bayesian network based on local measurements on independent copies of a composite quantum system combined with postselection. We further show that this protocol corresponds to a nonprojective measurement. It thus allows the investigation of the multi-time properties of a given local observable while fully preserving all its quantum features.

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从量子系统的多个副本中提取贝叶斯网络

摘要与量子过程相关的动态贝叶斯网络尽管在理论上非常重要，但目前还无法通过实验获得。我们在此介绍一种通用方案，它基于对复合量子系统独立副本的局部测量和后选择，确定贝叶斯网络的多时路径概率。我们进一步证明，该方案对应于非投影测量。因此，它允许研究给定局部观测值的多时特性，同时完全保留其所有量子特征。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

EPL 物理-物理：综合

CiteScore

3.30

自引率

5.60%

发文量

332

审稿时长

1.9 months

期刊介绍： General physics – physics of elementary particles and fields – nuclear physics – atomic, molecular and optical physics – classical areas of phenomenology – physics of gases, plasmas and electrical discharges – condensed matter – cross-disciplinary physics and related areas of science and technology. Letters submitted to EPL should contain new results, ideas, concepts, experimental methods, theoretical treatments, including those with application potential and be of broad interest and importance to one or several sections of the physics community. The presentation should satisfy the specialist, yet remain understandable to the researchers in other fields through a suitable, clearly written introduction and conclusion (if appropriate). EPL also publishes Comments on Letters previously published in the Journal.