中国科学技术大学王文阁--中文主页-- Quantum Loschmidt echo or fidelity decay in classically chaotic and regular systems.Main achievements: a uniform semiclassical approach to fidelity decay in systems with weak chaos in the classical limit, a general semiclassical expression for fidelity decay in the Lyapunov regime of systems with chaotic classical limit, semiclassical expressions of fidelity decay in regular systems

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教师拼音名称：wangwenge
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学位：博士

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Quantum Loschmidt echo or fidelity decay in classically chaotic and regular systems.Main achievements: a uniform semiclassical approach to fidelity decay in systems with weak chaos in the classical limit, a general semiclassical expression for fidelity decay in the Lyapunov regime of systems with chaotic classical limit, semiclassical expressions of fidelity decay in regular systems

上一条：A semiclassical approach to the sensitivity of quantum motion near quantum phase transitions

下一条：A generalized perturbation theory and its application to energy eigenfunctions (EFs)and to local spectral density of states (LDOS) in classically chaotic and mixed-type systems. Including: separation of EFs into non-perturbative and perturbative (tail) parts, statistics of EFs in their non-perturbative parts, dynamical localization, and renormalized Hamiltonians for the non-perturbative parts of EFs; structural properties and a scaling property of LDOS