Rings and boxes in dissipative environments
We study a particle on a ring in presence of a dissipative Caldeira-Leggett environment and derive its response to a dc field. We find, through a 2-loop renormalization group analysis, that a large dissipation parameter η flows to a fixed point η(R)=η(c)=ℏ/2π. We also reexamine the mapping of this p...
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Veröffentlicht in: | Physical review letters 2011-04, Vol.106 (16), p.166803-166803, Article 166803 |
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creator | Etzioni, Yoav Horovitz, Baruch Le Doussal, Pierre |
description | We study a particle on a ring in presence of a dissipative Caldeira-Leggett environment and derive its response to a dc field. We find, through a 2-loop renormalization group analysis, that a large dissipation parameter η flows to a fixed point η(R)=η(c)=ℏ/2π. We also reexamine the mapping of this problem to that of the Coulomb box and show that the relaxation resistance, of recent interest, is quantized for large η. For finite η>η(c) we find that a certain average of the relaxation resistance is quantized. We propose a box experiment to measure a quantized noise. |
doi_str_mv | 10.1103/PhysRevLett.106.166803 |
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title | Rings and boxes in dissipative environments |
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