Entropy squeezing for qubit鈥揻ield system in the presence multi-photon process under decoherence effect

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• 作者：S. Abdel-Khalek (1) (2)
  K. Berrada (3)
  A.-S. F. Obada (4)
  M. R. B. Wahiddin (5)
  
  1. The Abdus Salam International Centre for Theoretical Physics ; Miramare-Trieste ; Italy
  2. Mathematics Department ; Faculty of Science ; Taif University ; Taif ; Saudi Arabia
  3. Department of Physics ; Al Imam Mohammad Ibn Saud Islamic University (IMSIU) ; College of Science ; Riyadh ; Saudi Arabia
  4. Mathematics Department ; Faculty of Science ; Al-Azher University ; Nassr City ; Cairo ; 11884 ; Egypt
  5. Department of Computer Science ; International Islamic University of Malaysia (IIUM) ; P.O. Box 10 ; 50728聽 ; Kuala Lumpur ; Malaysia
  
• 关键词：Field entropy squeezing ; Qubit ; Wehrl entropy ; Decoherence ; Multi ; photon transition
• 刊名：Optical and Quantum Electronics
• 出版年：2015
• 出版时间：February 2015
• 年：2015
• 卷：47
• 期：2
• 页码：267-278
• 全文大小：536 KB
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• 刊物主题：Optics, Optoelectronics, Plasmonics and Optical Devices; Electrical Engineering; Characterization and Evaluation of Materials; Computer Communication Networks;
• 出版者：Springer US
• ISSN：1572-817X

文摘

In this paper, we study in detail the dynamics of field entropy squeezing (FES) for qubit鈥揻ield system whose dynamics is described quantitatively in terms of multi-photon and phase damping processes. Especially, considering a two-level atom interacts with a single-mode quantized field in a coherent state inside a phase-damped cavity, and taking into account the number of multi-photon transitions and phase damping effect. The FES is investigated during the time evolution as a function of involved parameters in the system.This quantity exhibits a richer structure to provide different phenomena by proper choice of the involved system parameters. Our results show that the initial coherent field type, number of photons transition and decoherence parameter play a crucial role on the evolution of FES during the time evolution under decoherence effect. An interesting monotonic relation between FES, Wehrl entropy and negativity is observed during the time evolution.