Nonequilibrium Fluctuation Relations in a Quantum Coherent Conductor

被引：90

作者：

Nakamura, Shuji ^{[1
]}

Yamauchi, Yoshiaki ^{[1
]}

Hashisaka, Masayuki ^{[1
]}

Chida, Kensaku ^{[1
]}

Kobayashi, Kensuke ^{[1
]}

Ono, Teruo ^{[1
]}

Leturcq, Renaud ^{[2
]}

Ensslin, Klaus ^{[3
]}

Saito, Keiji ^{[4
]}

Utsumi, Yasuhiro ^{[5
]}

Gossard, Arthur C. ^{[6
]}

机构：

[1] Kyoto Univ, Inst Chem Res, Kyoto 6110011, Japan

[2] CNRS, UMR 8520, Inst Elect Microelect & Nanotechnol, Dept ISEN, F-59652 Villeneuve Dascq, France

[3] ETH, Solid State Phys Lab, CH-8093 Zurich, Switzerland

[4] Univ Tokyo, Grad Sch Sci, Tokyo 1130033, Japan

[5] Univ Tokyo, Inst Solid State Phys, Chiba 2778581, Japan

[6] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 08期

基金：

日本科学技术振兴机构;

关键词：

IRREVERSIBLE-PROCESSES; NONLINEAR TRANSPORT; THERMAL AGITATION; CHARGE; NOISE;

D O I：

10.1103/PhysRevLett.104.080602

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We experimentally demonstrate the validity of nonequilibrium fluctuation relations by using a quantum coherent conductor. In equilibrium the fluctuation-dissipation relation leads to the correlation between current and current noise at the conductor, namely, the Johnson-Nyquist relation. When the conductor is voltage biased so that the nonlinear regime is entered, the fluctuation theorem has predicted similar nonequilibrium fluctuation relations, which hold true even when the Onsager-Casmir relations are broken in magnetic fields. Our experiments qualitatively validate the predictions as the first evidence of this theorem in the nonequilibrium quantum regime.

引用

页数：4

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