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

作　　者：R.Daneshmand M.K.Tavassoly 

机构地区：[1]Atomic and Molecular Group,Faculty of Physics,Yazd University,Yazd,Iran [2]Photonics Research Group,Engineering Research Center,Yazd University,Yazd,Iran [3]The Laboratory of Quantum Information Processing,Yazd University,Yazd,Iran

出　　处：《Communications in Theoretical Physics》2017年第4期365-376,共12页理论物理通讯（英文版）

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.

关 键 词：Caldirola–Kanai Hamiltonian squeezed vacuum state one-photon squeezed state excited even coherent state excited odd coherent state 

分 类 号：O441.4[理学—电磁学]