具有开放控制的量子开关不稳定性

IF 5.4 1区 物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY Communications Physics Pub Date : 2024-11-19 DOI:10.1038/s42005-024-01843-y
Otavio A. D. Molitor, André H. A. Malavazi, Roberto Dobal Baldijão, Alexandre C. Orthey Jr., Ismael L. Paiva, Pedro R. Dieguez
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引用次数: 0

摘要

因果顺序的叠加为各种量子技术带来了希望。然而,环境相互作用会导致量子系统的脆弱性,从而导致耗散行为和不可逆性,这就要求我们更深入地了解因果顺序相干控制中可能存在的不稳定性。在这项工作中,我们采用碰撞模型来研究开放式控制系统对两个因果顺序之间产生干扰的影响。我们提出了两种任意量子操作切换时的环境不稳定性,并考察了环境温度对控制后选择的每种潜在结果的影响。此外,我们还探讨了环境不稳定性如何影响协议性能,包括在互不偏倚的测量观测值和因果阶叠加驱动的制冷之间切换,为更广泛的影响提供了见解。利用量子开关--一个涉及受控操作后选择控制的过程--相关系统可以在受操作顺序叠加支配的有效动态下演化。这项工作研究了在现实场景中,环境对控制的影响如何影响所需的阶次叠加。
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Quantum switch instabilities with an open control
The superposition of causal orders shows promise in various quantum technologies. However, the fragility of quantum systems arising from environmental interactions, leading to dissipative behavior and irreversibility, demands a deeper understanding of the possible instabilities in the coherent control of causal orders. In this work, we employ a collisional model to investigate the impact of an open control system on the generation of interference between two causal orders. We present the environmental instabilities for the switch of two arbitrary quantum operations and examine the influence of environmental temperature on each potential outcome of control post-selection. Additionally, we explore how environmental instabilities affect protocol performance, including switching between mutually unbiased measurement observables and refrigeration powered by causal order superposition, providing insights into broader implications. Using the quantum switch—a process involving a controlled operation followed by post-selection of the control—a system of interest can evolve under an effective dynamics governed by a superposition of operation orders. This work investigates how environmental influences on the control impact the desired superposition of orders in realistic scenarios.
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来源期刊
Communications Physics
Communications Physics Physics and Astronomy-General Physics and Astronomy
CiteScore
8.40
自引率
3.60%
发文量
276
审稿时长
13 weeks
期刊介绍: Communications Physics is an open access journal from Nature Research publishing high-quality research, reviews and commentary in all areas of the physical sciences. Research papers published by the journal represent significant advances bringing new insight to a specialized area of research in physics. We also aim to provide a community forum for issues of importance to all physicists, regardless of sub-discipline. The scope of the journal covers all areas of experimental, applied, fundamental, and interdisciplinary physical sciences. Primary research published in Communications Physics includes novel experimental results, new techniques or computational methods that may influence the work of others in the sub-discipline. We also consider submissions from adjacent research fields where the central advance of the study is of interest to physicists, for example material sciences, physical chemistry and technologies.
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