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首页> 外文期刊>Philosophical transactions of the Royal Society. Mathematical, physical, and engineering sciences >Bose-Einstein condensation and superfluidity of trapped polaritons in graphene and quantum wells embedded in a microcavity
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Bose-Einstein condensation and superfluidity of trapped polaritons in graphene and quantum wells embedded in a microcavity

机译:玻色-爱因斯坦凝聚和陷获的极化子在石墨烯和微腔中嵌入的量子阱中的超流动性

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摘要

The theory for spontaneous coherence of short-lived quasiparticles in two-dimensional excitonic systems is reviewed, in particular, quantum wells (QWs) and graphene layers (GLs) embedded in microcavities. Experiments with polaritons in an optical microcavity have already shown evidence of Bose-Einstein condensation (BEC) in the lowest quantum state in a harmonic trap. The theory of BEC and superfluidity of the microcavity excitonic polaritons in a harmonic potential trap is presented. Along the way, we determine a general method for defining the superfluid fraction in a two-dimensional trap, within the angular momentum representation.We discuss BEC of magnetoexcitonic polaritons (magnetopolaritons) in a QW and GL embedded in an optical microcavity in high magnetic field. It is shown that Rabi splitting in graphene is tunable by the external magnetic field B, while in a QW the Rabi splitting does not depend on the magnetic field in the strong B limit.
机译:综述了二维激子系统中短寿命准粒子的自发相干理论,尤其是嵌入微腔中的量子阱(QW)和石墨烯层(GL)。在光学微腔中对极化子进行的实验已经显示出谐波陷阱中最低量子态的玻色-爱因斯坦凝聚(BEC)的证据。提出了BEC理论和谐波势阱中微腔激子极化子的超流动性。一路走来,我们确定了一种在角动量表示内定义二维陷阱中超流体分数的通用方法。我们讨论了QW中的磁激子极化子(BEC)的BEC和强磁场中嵌入光学微腔中的GL 。结果表明,石墨烯中的拉比分裂可通过外部磁场B来调节,而在量子阱中,拉比分裂不依赖于强B极限中的磁场。

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