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Influence of excited state decay and dephasing on phonon quantum state preparation

机译:激发态衰减和脱位对声子量子态制剂的影响

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摘要

The coupling between single-photon emitters and phonons opens many possibilities to store and transmit quantum properties. In this paper, we apply the independent boson model to describe the coupling between an optically driven two-level system and a discrete phonon mode. Tailored optical driving allows not only to generate coherent phonon states, but also to generate coherent superpositions in the form of Schrodinger cat states in the phonon system. We analyze the influence of decay and dephasing of the two-level system on these phonon preparation protocols. We find that the decay transforms the coherent phonon state into a circular distribution in phase space. Although the dephasing between two exciting laser pulses leads to a reduction of the interference ability in the phonon system, the decay conserves it during the transition into the ground state. This allows to store the phonon quantum state properties in the ground state of the single-photon emitter.
机译:单光子发射器和声子之间的耦合打开了存储和传输量子特性的许多可能性。在本文中,我们应用独立的玻体模型来描述光学驱动的两级系统和离散声子模式之间的耦合。量身定制的光学驾驶允许不仅可以生成相干的声子状态,而且还可以以Schrodinger猫州的形式产生相干叠加在声子系统中。我们分析了衰减和去除两级系统对这些声子制备方案的影响。我们发现衰减将相干声子状态转换为相位空间的圆形分布。尽管两个激动的激光脉冲之间的脱模导致声子系统中的干扰能力的降低,但是衰减在过渡到地面状态期间将其节省。这允许在单光子发射器的地状态下存储声子量子状态特性。

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  • 来源
    《Physical review》 |2019年第2期|024306.1-024306.10|共10页
  • 作者单位

    Univ Munster Inst Solid State Theory D-48149 Munster Germany;

    Univ Munster Inst Solid State Theory D-48149 Munster Germany;

    Univ Munster Inst Solid State Theory D-48149 Munster Germany;

    Univ Munster Inst Solid State Theory D-48149 Munster Germany;

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  • 正文语种 eng
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