Quantum Coherence Behaviors for a Uniformly Accelerated Atom Immersed in Fluctuating Vacuum Electromagnetic Field with a Boundary
- 9 Downloads
We investigate the dynamics of quantum coherence (QC) for a uniformly accelerated atom interacting with fluctuating electromagnetic field subject to a conductor boundary. We firstly derive the master equation that the atom evolution obeys. We find that without boundary, QC declines under the effect of Unruh thermal bath and vacuum fluctuation. However, with a boundary, the degradation, fluctuation, and preservation of QC are closely related to boundary effect, atomic polarization, and acceleration. Furthermore, in the presence of a boundary, QC can effectively be protected under the influence of the vacuum fluctuation and Unruh thermal effect when the atom is transversely polarizable and near this boundary, and the presence of boundary gives us more freedom of controlling the QC behaviors.
KeywordsQuantum coherence Unruh effect Dynamics Electromagnetic field
Huang is supported by the National Natural Science Foundation of China (61871205), the Innovation Project of Department of Education of Guangdong Province (2017KTSCX180), and the Jiangmen Science and Technology Plan Project for Basic and Theoretical Research (2018JC01010). Zhang is supported by the Young Science and Technology Talent Growth Fund Project of Education Department of Guizhou Province of China (Qian Jiao He KY Zi426), the Major Special Fund Project of Research and Innovation for Qiannan Normal university for Nationalities of China (QNSY2018BS015), the Industrial Technology Foundation of Qiannan State of China (Qiannan Ke He Gong Zi (2017) 9 Hao) and the Scientific Research Foundation for High-level Talents of Qiannan Normal University for Nationalities (qnsyrc201716).
- 19.B. Deveaud-Plédran, A. Quattropani, P. Schwendimann (eds.), Quantum coherence in solid state systems, Vol. 171 (IOS Press, Amsterdam, 2009). ISBN: 978-1-60750-039-1Google Scholar
- 26.A. Streltsov, U. Singh, H.S. Dhar, M.N. Bera, G. Adesso, Measuring quantum coherence with entanglementGoogle Scholar