Dynamics of Nonclassicality of Time-and Conductivity-Dependent Squeezed States and Excited Even/Odd Coherent States

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英文篇名：Dynamics of Nonclassicality of Time-and Conductivity-Dependent Squeezed States and Excited Even/Odd Coherent States 作者：R.Daneshmand ; M.K.Tavassoly 英文作者：R.Daneshmand;M.K.Tavassoly;Atomic and Molecular Group,Faculty of Physics,Yazd University;Photonics Research Group,Engineering Research Center,Yazd University;The Laboratory of Quantum Information Processing,Yazd University; 英文关键词：Caldirola–Kanai Hamiltonian;;squeezed vacuum state;;one-photon squeezed state;;excited even coherent state;;excited odd coherent state 中文刊名：CITP 英文刊名：理论物理通讯(英文版) 机构：Atomic and Molecular Group,Faculty of Physics,Yazd University;Photonics Research Group,Engineering Research Center,Yazd University;The Laboratory of Quantum Information Processing,Yazd University; 出版日期：2017-04-01 出版单位：Communications in Theoretical Physics 年：2017 期：v.67 语种：英文; 页：CITP201704006 页数：12 CN：04 ISSN：11-2592/O3 分类号：23-34

摘要

Recently, the quantum description of electromagnetic waves in conducting media has been performed. It has been demonstrated that in particular case, the Hamiltonian of the corresponding field can be expressed by Caldirola–Kanai Hamiltonian. In this paper, using the associated annihilation and creation operators of the above-mentioned quantized field, the time-and conductivity-dependent squeezed vacuum and one-photon squeezed states as well as their superpositions, and also the time-and conductivity-dependent excited even and odd coherent states are produced. Also,using a few well-known nonclassicality criteria, the time evolution of nonclassicality features of the above classes of obtained states, in addition to the influence of medium conductivity on them are demonstrated, numerically. It has been shown that the nonclassicality indicators may be adjusted by tuning the conductivity of media.
        Recently, the quantum description of electromagnetic waves in conducting media has been performed. It has been demonstrated that in particular case, the Hamiltonian of the corresponding field can be expressed by Caldirola–Kanai Hamiltonian. In this paper, using the associated annihilation and creation operators of the above-mentioned quantized field, the time-and conductivity-dependent squeezed vacuum and one-photon squeezed states as well as their superpositions, and also the time-and conductivity-dependent excited even and odd coherent states are produced. Also,using a few well-known nonclassicality criteria, the time evolution of nonclassicality features of the above classes of obtained states, in addition to the influence of medium conductivity on them are demonstrated, numerically. It has been shown that the nonclassicality indicators may be adjusted by tuning the conductivity of media.

引文

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    It is worth mentioning that we should use histogram to correctly represent number distribution against the photon number,which is integer.However,due to our purpose to compare the effect of different values of conductivity parameters,we use continuous lines.So,the values of the plots in Figs.1 and 2 are valid only for integer values of n.