On the example of a quantum oscillator the connection of the dynamical coherent state with the phase symmetry breaking and the existence of the nondissipative motion is considered. In multiparticle systems of interacting particles similar states manifest themselves as super uidity and superconductivity.
Quantum oscillator as 1D anyon
Entropy of a Quantum Oscillator coupled to a Heat Bath and implications for Quantum Thermodynamics
Relaxation and pumping of quantum oscillator nonresonantly coupled with the other oscillator
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