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Time evolution of the Lamb shift

Author(s):� Wang, DW (Wang, Da-Wei); Li, ZH (Li, Zheng-Hong); Wang, LG (Wang, Li-Gang); Zhu, SY (Zhu, Shi-Yao); Zubairy, MS (Zubairy, M. Suhail) Source:� OPTICS LETTERS, 35 (17): 2861-2863 SEP 1 2010

The time evolution of the Lamb shift that accompanies the real photon emission is studied for the first time (to our knowledge). The investigation of the explicit time dependence of the Lamb shift becomes possible because the self-energy of the free electron, which is divergent, is subtracted from the Hamiltonian after a unitary transformation. The Lamb shift can then be separated into two parts: one is the time-independent shift due to the virtual photon exchange, and the other is the time-dependent shift due to the real photon emission. The time evolution depends on the nature of the coupling spectrum of the reservoir. (C) 2010 Optical Society of America

Author(s):� Wang, DW (Wang, Da-Wei); Li, ZH (Li, Zheng-Hong); Wang, LG (Wang, Li-Gang); Zhu, SY (Zhu, Shi-Yao); Zubairy, MS (Zubairy, M. Suhail) 
Source:� OPTICS LETTERS, 35 (17): 2861-2863 SEP 1 2010 
Language:� English 
Document Type:� Article 
KeyWords Plus:� SPONTANEOUS EMISSION; QUANTIZATION 
Addresses:� [Wang, Da-Wei; Zhu, Shi-Yao] Shanxi Agr Univ, Inst Optoelect, Taiyuan 030006, Peoples R China; [Wang, Da-Wei; Wang, Li-Gang; Zhu, Shi-Yao] Chinese Univ Hong Kong, Ctr Opt Sci, Hong Kong, Hong Kong, Peoples R China; [Wang, Da-Wei; Wang, Li-Gang; Zhu, Shi-Yao] Chinese Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China; [Li, Zheng-Hong; Zhu, Shi-Yao] Hong Kong Baptist Univ, Dept Phys, Hong Kong, Hong Kong, Peoples R China; [Zubairy, M. Suhail] Texas A&M Univ, Inst Quantum Studies, College Stn, TX 77843 USA; [Zubairy, M. Suhail] Texas A&M Univ, Dept Phys, College Stn, TX 77843 USA 
Reprint Address:� Wang, DW, Shanxi Agr Univ, Inst Optoelect, Taiyuan 030006, Peoples R China. 
Funding Agency:� Research Grants Council of the Hong Kong government - Hong Kong Baptist University - Chinese University of Hong Kong - Qatar National Research Fund 
Publisher:� OPTICAL SOC AMER 
Publisher Address:� 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA 
ISSN:� 0146-9592 
29-char Source Abbrev.:� OPTICS LETTERS 
ISO Source Abbrev.:� Opt. Lett. 
Subject Category:� Optics 
ISI Document Delivery No.:� 646FI

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