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EPR steering of polar molecules in pendular states and their dynamics under intrinsic decoherence

机译：epr在单个态度下的极性分子的转向及其在内在脱机下的动力学

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摘要

Einstein-Podolsky-Rosen (EPR) steering gives evidence for the phenomenon called spooky action at a distance in quantum mechanics, and provides a useful resource for the implementation of quantum information tasks. In this paper, we consider a pair of ultracold polar molecules trapped in an external electric field as a promising quantum information carrier, and analyze the evolution behavior of EPR steering for the two coupled polar molecules in pendular states. Our results show that the steering of the two linear dipoles is remarkably reliant upon the Stark effect and dipole-dipole interaction. To be specific, the steerability degree is inversely associated with the intensity of the electric field while it is positively correlated with the coupling strength between the two polar molecules. Moreover, it is found that high ambient temperature can lead to a rapid loss of the steerable resource in thermal equilibrium. Further, we put forward an effective strategy to enhance the steerability using the technique of weak measurement reversal (WMR). By taking into account the influence of intrinsic decoherence on the steering dynamics, we found that robust EPR steering preservation can be realized for the initial state being in the Bell state Our findings may shed some new light on molecular quantum information processing with pendular states.
机译：爱因斯坦 - 波多尔斯基 - 罗森（EPR）的转向提供了证据，呼吁在量子力学的距离幽灵行动的现象，并为量子信息任务的执行有用的资源。在本文中，我们认为一对被困在外部电场作为一个有前途的量子信息载体的超冷极性分子，并分析EPR转向的演化行为在摆动状态下的两个耦合的极性分子。我们的结果表明，该两个线性偶极子的转向是基于斯塔克效应和偶极 - 偶极相互作用显着的依赖。具体而言，所述可转向的程度成反比与电场的强度相关联，而其正与两个极性分子之间的结合强度密切相关。此外，据发现，高的环境温度可以导致在热平衡可转向资源的快速丧失。此外，我们还提出了一种有效的策略，以提高使用弱测量逆转（WMR）的技术操舵。通过考虑转向动态禀退相干的影响，我们发现，强大的EPR转向保存即可实现初始状态在贝尔状态我们的发现可能揭示分子的量子信息处理一些新的光摆动的状态。

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  • 来源
    《RSC Advances》 |2018年第63期|共8页
  • 作者

    Zhang Zuo-Yuan; Wei Daxiu; Hu Zhengfeng; Liu Jin-Ming;

  • 作者单位

    East China Normal Univ State Key Lab Precis Spect Shanghai 200062 Peoples R China;

    China Normal Univ Dept Phys Shanghai 200062 Peoples R China;

    Chinese Acad Sci Shanghai Inst Opt &

    Fine Mech Key Lab Quantum Opt Shanghai 201800 Peoples R China;

    East China Normal Univ State Key Lab Precis Spect Shanghai 200062 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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