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arXiv 1306.5107cond-mat.quant-gas
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染料填充光学微腔中光子玻色-爱因斯坦凝聚的Schwinger-Keldysh理论

Schwinger-Keldysh theory for Bose-Einstein condensation of photons in a dye-filled optical microcavity

A. -W. de Leeuw, H. T. C. Stoof, R. A. Duine

摘要:

我们考虑光子在充满染料分子的光腔中的玻色-爱因斯坦凝聚,染料分子被激光激发。通过使用Schwinger-Keldysh形式主义,我们推导出一个朗之万场方程,该方程描述了光子气体的动力学,特别是其平衡性质和向平衡的弛豫。此外,我们表明,光子的有限寿命效应被捕获在一个单一的无量纲阻尼参数,这取决于外部激光泵浦染料的功率。最后,作为我们理论的应用,我们确定了正常和玻色-爱因斯坦凝聚相光子气体的光谱函数和集体模。

英文摘要:

We consider Bose-Einstein condensation of photons in an optical cavity filled with dye molecules that are excited by laser light. By using the Schwinger-Keldysh formalism we derive a Langevin field equation that describes the dynamics of the photon gas, and in particular its equilibrium properties and relaxation towards equilibrium. Furthermore we show that the finite lifetime effects of the photons are captured in a single dimensionless damping parameter, that depends on the power of the external laser pumping the dye. Finally, as applications of our theory we determine spectral functions and collective modes of the photon gas in both the normal and the Bose-Einstein condensed phase.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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