Entanglement Robustness in Trace Decreasing Quantum Dynamics

Q1 Arts and Humanities
Quanta Pub Date : 2021-09-03 DOI:10.12743/quanta.v10i1.163
S. Filippov
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引用次数: 4

Abstract

Trace decreasing dynamical maps are as physical as trace preserving ones; however, they are much less studied. Here we overview how the quantum Sinkhorn theorem can be successfully applied to find a two-qubit entangled state which has the strongest robustness against local noises and losses of quantum information carriers. We solve a practically relevant problem of finding an optimal initial encoding to distribute entangled polarized qubits through communication lines with polarization dependent losses and extra depolarizing noise. The longest entanglement lifetime is shown to be attainable with a state that is not maximally entangled.Quanta 2021; 10: 15–21.
减迹量子动力学中的纠缠鲁棒性
减少轨迹的动力学映射与保留轨迹的映射一样具有物理性质;然而,对它们的研究要少得多。在这里,我们概述了如何成功地应用量子辛霍恩定理来寻找一种对局部噪声和量子信息载体损失具有最强鲁棒性的双量子比特纠缠态。我们解决了一个实际相关的问题,即找到一个最佳的初始编码,以通过具有偏振相关损耗和额外去极化噪声的通信线路来分布纠缠偏振量子位。最长的纠缠寿命被证明是可以在没有最大纠缠的状态下实现的。广达2021;10:15-21。
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
Quanta
Quanta Arts and Humanities-History and Philosophy of Science
CiteScore
1.30
自引率
0.00%
发文量
5
审稿时长
12 weeks
期刊介绍: Quanta is an open access academic journal publishing original research and review articles on foundations of quantum mechanics, mathematical physics and philosophy of science.
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