Minimal coupling in oscillator models of quantum dissipation |
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Authors: | H Kohler F Sols |
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Institution: | 1. Instituto de Ciencia de Materiales de Madrid, CSIC, Sor Juana de la Cruz 3, Cantoblanco, 28049 Madrid, Spain;2. Departamento de Física de Materiales, Universidad Complutense de Madrid, E-28040 Madrid, Spain |
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Abstract: | The dissipative harmonic oscillator has two representations. In the first representation the central oscillator couples with its position to an oscillator bath. In the second one it couples with its momentum to the bath. Both representations are related by a unitary transformation. If the central oscillator couples with its position and momentum to two independent baths, no such unitary transformation exists. We discuss two possible models of this type and their physical relevance. |
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Keywords: | Quantum dissipation Harmonic oscillator Anomalous dissipation Quantum frustration |
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