Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2011-01-21
Phys. Rev. Lett. 106, 166803 (2011)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
5 pages, 1 figure Minor changes in the text, a few references added
Scientific paper
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 $\eta$ flows to a fixed point $\eta_R=\eta_c=\hbar/2\pi$. 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 $\eta$. For finite $\eta>\eta_c$ we find that a certain average of the relaxation resistance is quantized. We propose a box experiment to measure a quantized noise.
Doussal Pierre Le
Etzioni Yoav
Horovitz Baruch
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