Quantum quench from a thermal initial state
نویسندگان
چکیده
منابع مشابه
Quantum Quench from a Thermal Initial State
We consider a quantum quench in a system of free bosons, starting from a thermal initial state. As in the case where the system is initially in the ground state, any finite subsystem eventually reaches a stationary thermal state with a momentum-dependent effective temperature. Remarkably enough, we find that this can, in some cases, even be lower than the initial temperature. We also study latt...
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Investigation of initial value problems for quantum fields using numerical simulation are difficult. The dynamics cannot be computed exactly and one has to use e.g. the classical approximation, the large N or Hartree approximation. It is then not obvious how to specify initial conditions properly. Here we focus on this problem and investigate a new way to supply initial conditions for classical...
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ژورنال
عنوان ژورنال: EPL (Europhysics Letters)
سال: 2009
ISSN: 0295-5075,1286-4854
DOI: 10.1209/0295-5075/87/20002