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Chin. Phys. B, 2012, Vol. 21(6): 060302    DOI: 10.1088/1674-1056/21/6/060302
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Quantum dynamic behaviour in a coupled cavities system

Peng Jun(彭俊), Wu Yun-Wen(邬云文), and Li Xiao-Juan(李小娟)
College of Physics, Mechanical and Electrical Engineering, Jishou University, Jishou 416000, China
Abstract  The dynamic behaviour of the two-site coupled cavities model which is doped with ta wo-level system is investigated. The exact dynamic solutions in the general condition are obtained via Laplace transform. The simple analytical solutions are obtained in several particular cases, which demonstrate the clear and simple physical picture for the quantum state transition of the system. In the large detuning or hoppling case, the quantum states transferring between qubits follow a slow periodic oscillation induced by the very weak excitation of the cavity mode. In the large coupling case, the system can be interpreted as two Jaynes-Cummings model subsystems which interact through photon hop between the two cavities. In the case of λΔ >> g, the quantum states transition of qubits is accompanied by the excitation of the cavity, and the cavity modes have the same dynamic behaviours and the amplitude of probability is equal to 0.25 which does not change with the variation of parameter.
Keywords:  coupled cavities      quantum dynamics behaviour      detuning      two-level system  
Received:  30 October 2011      Revised:  12 December 2011      Accepted manuscript online: 
PACS:  03.67.-a (Quantum information)  
  42.50.Pq (Cavity quantum electrodynamics; micromasers)  
  42.50.Ex (Optical implementations of quantum information processing and transfer)  
Fund: Project supported by the Science and Technology Plan of Hunan Province, China (Grant No. 2010FJ3081) and the Natural Science Foundation of Hunan Province of China (Grant No. 11JJ3003).
Corresponding Authors:  Wu Yun-Wen     E-mail:

Cite this article: 

Peng Jun(彭俊), Wu Yun-Wen(邬云文), and Li Xiao-Juan(李小娟) Quantum dynamic behaviour in a coupled cavities system 2012 Chin. Phys. B 21 060302

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