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Chinese Physics B 2009年第3期18卷 918-921页

作者：徐兴磊李洪奇范洪义 Department of Physics Heze University Key Laboratory of Quantum Communication and Calculation Heze University

By virtue of the well-behaved properties of the bipartite entangled states representation, this paper analyse and solves some master equations for generalized phase diffusion models, which seems concise and effective.... 详细信息

关键词： generalized phase diffusion entangled state representation master equations

New approach to solving master equations of density operator for the Jaynes Cummings model with cavity damping

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Chinese Physics B 2014年第9期23卷 65-70页

作者： Seyed Mahmoud Ashrafi Mohammad Reza Bazrafkan Physics Department Faculty of ScienceI.K.I.University

By introducing thermo-entangled state representation Ⅰη〉, which can map master equations of density operator in quantum statistics as state-vector evolution equations, and using ＂dissipative interaction picture＂ we solve the master equation of Jaynes-Cummings model with cavity damping. In addition we derive the Wigner function for density operator when the atom is initially in the up state Ⅰ↑〉 and the cavity mode is in coherent state.

关键词： Jaynes-Cummings model entangled state representation master equations

Control engineering of continuous-mode single-photon states:a review

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Control Theory and Technology 2021年第4期19卷 544-562页

作者： Guofeng Zhang Department of Applied Mathematics The Hong Kong Polytechnic UniversityHong KongChina

In this survey, we present single-photon states of electromagnetic felds, discuss discrete measurements of a single-photonfeld, show how a linear quantum system responds to a single-photon input, investigate how a coherent feedback network canbe used to manipulate the temporal pulse shape of a single-photon state, present single-photon flter and master equations,and fnally discuss the generation of Schrödinger cat states by means of photon addition and subtraction.

关键词： Quantum control Continuous-mode single photon states Coherent feedback Filtering master equations Schrödinger cat states

Production mechanism of superheavy nuclei in massive fusion reactions

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Chinese Physics C 2009年第S1期33卷 86-88页

作者：冯兆庆靳根明李君清 Werner Scheid Institute of Modern Physics Chinese Academy of Sciences Institut für Theoretische Physik der Universitt

Within the concept of the dinuclear system (DNS), a dynamical model is proposed for describing the formation of superheavy nuclei in complete fusion reactions by incorporating the coupling of the relative motion to the nucleon transfer process. The capture of two heavy colliding nuclei, the formation of the compound nucleus and the de-excitation process are calculated by using an empirical coupled channel model, solving a set of microscopically derived master equations numerically and applying statistical theory, respectively. Fusion-fission reactions and evaporation residue excitation functions of synthesizing superheavy nuclei (SHN) are investigated systematically and compared them with available experimental data. The possible factors that affecting the production cross sections of SHN are discussed in this workshop.

关键词： DNS model master equations production cross sections

A new approach to the time evolution of characteristic function of the density operator obtained by virtue of thermal entangled state representation

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Science China(Physics,Mechanics & Astronomy) 2012年第11期55卷 2076-2080页

作者： CHEN Feng FAN HongYi Department of Material Science and Engineering University of Science and Technology of ChinaHefei 230026China Department of Mathematics and Physics Hefei UniversityHefei 230022China

Like the progress made by Dirac that wave function ψ(x) was reformed as x |ψ,where x| is the coordinate representation,we endow the characteristic function χλ = Tr(e λa-λaρ) of density operator ρ with the meaning of wave function of |ρ in the thermal entangled state η| representation in the doubled Fock space,χλ = η = λ|ρ,where |ρ = ρ|η = *** find the time evolution of χλ can then be directly and neatly obtained via this *** way of deriving the density operator from η = λ | ρ is also presented.

关键词： characteristic function density operator master equations thermal entangled state representation