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首页> 外文期刊>Laser physics letters >Letter: One-way steering of the optical fields with respect to the low-Q cavity via the thermal noise
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Letter: One-way steering of the optical fields with respect to the low-Q cavity via the thermal noise

机译：字母：通过热噪声对低Q腔的光学场的单向转向

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摘要

We show that thermal noise could play a positive role in generating one-way Einstein-Podolsky-Rosen (EPR) steering of two cavity fields dispersively interacting with a single four-level atom, each of which is independently coupled to a thermal reservoir. In the low-Q and weak Raman transition regimes, two output fields exhibit asymmetric EPR steering and the steering direction could be easily controlled by adjusting the mean photon numbers of the thermal reservoirs and the decay rates of cavities. Striking features are present in our scheme. First, one-way EPR steering is achieved by using the couplings of the cavities with the heat baths, which sheds light on the quantum state manipulation in the presence of decoherence. Second, the obtainable EPR steering occurs between the cavity fields in the low-Q regime, which relaxes the constraints on the use of good cavities and so makes our scheme more practical. Third, the correlation properties of the output modes are considered, which can be measured more conveniently and will be more applicable to implement a range of quantum information processing.
机译：我们表明热噪声在生成单向Einstein-Podolsky-Rosen（EPR）转向时可以发挥积极作用，其两个腔场与单个四级原子相互作用的两个腔场的转向，每个腔体均独立地连接到热贮存器。在低Q和弱拉曼转换制度中，通过调节热容器的平均光子数和空腔的衰减速率，可以容易地控制两个输出场表现出不对称EPR转向和转向方向。我们的计划中存在着惊人的功能。首先，通过使用具有热浴的腔的联轴器来实现单向EPR转向，该热浴使光在堵塞存在下的量子状态操纵上。其次，可获得的EPR转向发生在低Q制度中的腔场之间，这释放了对使用良好腔的限制，因此使我们的方案更加实用。第三，考虑输出模式的相关性，可以更方便地测量，并且更适用于实现一系列量子信息处理。

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