arXiv 1311.44892013-11quant-phphysics.atom-ph

单囚禁离子量子关联的局域探测

Local Detection of Quantum Correlations with a Single Trapped Ion

M. Gessner, M. Ramm, T. Pruttivarasin, A. Buchleitner, H. -P. Breuer, H. Haeffner

备注：: 6 Pages, 5 Figures + 6 Pages, 1 Figure of Supplementary Material
发表信息：: Nature Physics 10, 105 (2014)
DOI：: 10.1038/nphys2829

摘要：

作为量子力学最显著的特征之一，量子关联是量子信息科学的核心。相关性的检测通常需要访问所有相关的子系统。然而，在许多现实的情况下，这是不可行的，因为只有一些子系统可以控制和测量。这种情况可以被视为开放量子系统与不可访问的环境相互作用。初始系统-环境关联对开放量子系统的动力学行为起着重要作用。根据最近的一项提议，我们利用相关性对开放系统动力学的影响来检测系统-环境量子相关性，而无需访问环境。我们使用两个自由度的囚禁离子模型的开放系统及其环境。本方法不需要对环境、相互作用或初始状态作任何假设，因此为量子系统的研究提供了一个通用的工具。

英文摘要：

As one of the most striking features of quantum mechanics, quantum correlations are at the heart of quantum information science. Detection of correlations usually requires access to all the correlated subsystems. However, in many realistic scenarios this is not feasible since only some of the subsystems can be controlled and measured. Such cases can be treated as open quantum systems interacting with an inaccessible environment. Initial system-environment correlations play a fundamental role for the dynamics of open quantum systems. Following a recent proposal, we exploit the impact of the correlations on the open-system dynamics to detect system-environment quantum correlations without accessing the environment. We use two degrees of freedom of a trapped ion to model an open system and its environment. The present method does not require any assumptions about the environment, the interaction or the initial state and therefore provides a versatile tool for the study of quantum systems.

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英文摘要：

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