Time-delayed feedback control of the Dicke-Hepp-Lieb superradiant quantum phase transition

被引：33
作者：
Kopylov, Wassilij [1 ]
Emary, Clive [2 ]
Schoell, Eckehard [1 ]
Brandes, Tobias [1 ]
机构：
[1] Tech Univ Berlin, Inst Theoret Phys, D-10623 Berlin, Germany
[2] Univ Hull, Dept Math & Phys, Kingston Upon Hull HU6 7RX, N Humberside, England
来源：
NEW JOURNAL OF PHYSICS | 2015年 / 17卷
关键词：
Dicke model; time-delayed feedback; Pyragas control; quantum phase transitions; quantum optics; CAVITY; MODEL;
D O I：
10.1088/1367-2630/17/1/013040
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We apply the time-delayed Pyragas control scheme to the dissipative Dicke model via a modulation of the atom-field-coupling. The feedback creates an infinite sequence of non-equilibrium phases with fixed points and limit cycles in the primary superradiant regime. We analyse this Hopf bifurcation scenario as a function of delay time and feedback strength and determine analytical conditions for the phase boundaries.
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页数：9
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