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arXiv 0709.3084quant-ph
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腔场与原子相互作用下耦合极化激元模的Josephson动力学

Josephson dynamics for coupled polariton modes under the atom-field interaction in the cavity

A. P. Alodjants, S. M. Arakelian, S. N. Bagayev, V. S. Egorov, A. Yu. Leksin

摘要:

研究了腔中强耦合条件下原子与光场相互作用中极化激元的玻色-爱因斯坦凝聚(BEC)问题。研究了原子介质中类克尔非线性耦合的上下支能级对应的两个宏观布居极化激元模的动力学行为。找出了所考虑系统中新型集体激发的色散关系。各种时间制度,如线性(非线性)约瑟夫森跃迁和/或拉比振荡,宏观量子自陷(MQST)动力学的极化激元模式的布居不平衡的预测。我们还研究了初始条件、原子介质的有效非线性参数和低支极化激元的动能对时均布居不平衡的开关特性的影响。

英文摘要:

We consider a new approach to the problem of Bose-Einstein condensation (BEC) of polaritons for atom-field interaction under the strong coupling regime in the cavity. We investigate the dynamics of two macroscopically populated polariton modes corresponding to the upper and lower branch energy states coupled via Kerr-like nonlinearity of atomic medium. We found out the dispersion relations for new type of collective excitations in the system under consideration. Various temporal regimes like linear (nonlinear) Josephson transition and/or Rabi oscillations, macroscopic quantum self-trapping (MQST) dynamics for population imbalance of polariton modes are predicted. We also examine the switching properties for time-averaged population imbalance depending on initial conditions, effective nonlinear parameter of atomic medium and kinetic energy of low-branch polaritons.

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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