Single photon transport properties in coupled cavity arrays nonlocally coupled to a two-level atom in the presence of dissipation

doi:10.1088/1674-1056/23/2/024202

中国物理B ›› 2014, Vol. 23 ›› Issue (2): 24202-024202.doi: 10.1088/1674-1056/23/2/024202

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇下一篇

Single photon transport properties in coupled cavity arrays nonlocally coupled to a two-level atom in the presence of dissipation

海莲^a, 谭磊^{a b}, 冯金山^a, 徐文斌^a, 王彬^a

a Institute of Theoretical Physics, Lanzhou University, Lanzhou 730070, China;
b Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730070, China

收稿日期:2013-04-17 修回日期:2013-06-11 出版日期:2013-12-12 发布日期:2013-12-12
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 10704031, 10874235, 11274148, and 10934010).

Single photon transport properties in coupled cavity arrays nonlocally coupled to a two-level atom in the presence of dissipation

Hai Lian (海莲)^a, Tan Lei (谭磊)^{a b}, Feng Jin-Shan (冯金山)^a, Xu Wen-Bin (徐文斌)^a, Wang Bin (王彬)^a

a Institute of Theoretical Physics, Lanzhou University, Lanzhou 730070, China;
b Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730070, China

Received:2013-04-17 Revised:2013-06-11 Online:2013-12-12 Published:2013-12-12
Contact: Tan Lei E-mail:tanlei@lzu.edu.cn
About author:42.50.Pq; 37.30.+i; 42.50.Ct
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 10704031, 10874235, 11274148, and 10934010).

摘要/Abstract

摘要： We discuss the effects of dissipation on the behavior of single photon transport in a system of coupled cavity arrays, with the two nearest cavities nonlocally coupled to a two-level atom. The single photon transmission amplitude is solved exactly by employing the quasi-boson picture. We investigate two different situations of local and nonlocal couplings, respectively. Comparing the dissipative case with the nondissipative one reveals that the dissipation of the system increases the middle dip and lowers the peak of the single photon transmission amplitudes, broadening the line width of the transport spectrum. It should be noted that the influence of the cavity dissipation to the single photon transport spectrum is asymmetric. By comparing the nonlocal coupling with the local one, one can find that the enhancement of the middle dip of single photon transmission amplitudes is mostly caused by the atom dissipation and that the reduced peak is mainly caused by the cavity dissipation, no matter whether it is a nonlocal or local coupling case. Whereas in the nonlocal coupling case, when the coupling strength gets stronger, the cavity dissipation has a greater effect on the single photon transport spectrum and the atom dissipation affection becomes weak, so it can be ignored.

关键词: single photon transport, dissipative coupled cavity arrays, dissipative two-level atom, local and nonlocal couplings

Abstract: We discuss the effects of dissipation on the behavior of single photon transport in a system of coupled cavity arrays, with the two nearest cavities nonlocally coupled to a two-level atom. The single photon transmission amplitude is solved exactly by employing the quasi-boson picture. We investigate two different situations of local and nonlocal couplings, respectively. Comparing the dissipative case with the nondissipative one reveals that the dissipation of the system increases the middle dip and lowers the peak of the single photon transmission amplitudes, broadening the line width of the transport spectrum. It should be noted that the influence of the cavity dissipation to the single photon transport spectrum is asymmetric. By comparing the nonlocal coupling with the local one, one can find that the enhancement of the middle dip of single photon transmission amplitudes is mostly caused by the atom dissipation and that the reduced peak is mainly caused by the cavity dissipation, no matter whether it is a nonlocal or local coupling case. Whereas in the nonlocal coupling case, when the coupling strength gets stronger, the cavity dissipation has a greater effect on the single photon transport spectrum and the atom dissipation affection becomes weak, so it can be ignored.

Key words: single photon transport, dissipative coupled cavity arrays, dissipative two-level atom, local and nonlocal couplings

中图分类号: (Cavity quantum electrodynamics; micromasers)

42.50.Pq

37.30.+i (Atoms, molecules, andions incavities) 42.50.Ct (Quantum description of interaction of light and matter; related experiments)

海莲, 谭磊, 冯金山, 徐文斌, 王彬. Single photon transport properties in coupled cavity arrays nonlocally coupled to a two-level atom in the presence of dissipation[J]. 中国物理B, 2014, 23(2): 24202-024202.

Hai Lian (海莲), Tan Lei (谭磊), Feng Jin-Shan (冯金山), Xu Wen-Bin (徐文斌), Wang Bin (王彬). Single photon transport properties in coupled cavity arrays nonlocally coupled to a two-level atom in the presence of dissipation[J]. Chin. Phys. B, 2014, 23(2): 24202-024202.

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Single photon transport properties in coupled cavity arrays nonlocally coupled to a two-level atom in the presence of dissipation

Single photon transport properties in coupled cavity arrays nonlocally coupled to a two-level atom in the presence of dissipation

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