Intrinsic Decoherence in Mesoscopic Systems

Details Intrinsic Decoherence in Mesoscopic Systems Intrinsic Decoherence in Mesoscopic Systems

1997-10-10

arxiv.org/abs/cond-mat/9710095v1

Phys. Rev. Lett. 77, 3366 (1997)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures & 1 table

Scientific paper

10.1103/PhysRevLett.78.3366

We present measurements of the phase coherence time $\tau_\phi$ in six quasi-1D Au wires and clearly show that $\tau_\phi$ is temperature independent at low temperatures. We suggest that zero-point fluctuations of the intrinsic electromagnetic environment are responsible for the observed saturation of $\tau_\phi$. We introduce a new functional form for the temperature dependence and present the results of a calculation for the saturation value of $\tau_\phi$. This explains the observed temperature dependence of our samples as well as many 1D and 2D systems reported to date.

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