Strong Coupling Theory for the Jaynes-Cummings-Hubbard Model

被引：110
作者：
Schmidt, S. [1 ]
Blatter, G. [1 ]
机构：
[1] ETH, Inst Theoret Phys, CH-8093 Zurich, Switzerland
来源：
PHYSICAL REVIEW LETTERS | 2009年 / 103卷 / 08期
关键词：
CAVITY; SYSTEM; ARRAYS;
D O I：
10.1103/PhysRevLett.103.086403
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We present an analytic strong-coupling approach to the phase diagram and elementary excitations of the Jaynes-Cummings-Hubbard model describing a superfluid-insulator transition of polaritons in an array of coupled QED cavities. In the Mott phase, we find four modes corresponding to particle or hole excitations with lower and upper polaritons, respectively. Simple formulas are derived for the dispersion and spectral weights within a strong-coupling random-phase approximation (RPA). The phase boundary is calculated beyond RPA by including the leading correction due to quantum fluctuations.
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页数：4
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