Probe-Configuration-Dependent Decoherence in an Aharonov-Bohm Ring

Details Probe-Configuration-Dependent Decoherence in an Aharonov-Bohm Ring Probe-Configuration-Dependent Decoherence in an Aharonov-Bohm Ring

2002-04-08

arxiv.org/abs/cond-mat/0204186v1

J. Phys. Soc. Jpn. 71, L2094-2097 (2002).

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures, RevTeX

Scientific paper

10.1143/JPSJ.71.2094

We have measured transport through mesoscopic Aharonov-Bohm (AB) rings with two different four-terminal configurations. While the amplitude and the phase of the AB oscillations are well explained within the framework of the Landaur-B\"uttiker formalism, it is found that the probe configuration strongly affects the coherence time of the electrons, i.e., the decoherence is much reduced in the configuration of so-called nonlocal resistance. This result should provide an important clue in clarifying the mechanism of quantum decoherence in solids.

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