Theory of macroscopic quantum coherence in d-wave superconductor junctions

被引：9
|
作者：
Umeki, T.
Kato, T. [1 ]
Yokoyama, T.
Tanaka, Y.
Kawabata, S.
Kashiwaya, S.
机构：
[1] Nagoya Univ, Japan Sci & Technol Corp, Dept Appl Phys, CREST, Nagoya, Aichi 4648603, Japan
[2] Univ Tokyo, Inst Solid State Phys, Chiba 2778581, Japan
[3] Natl Inst Adv Ind & Technol, Nanotechnol Res Inst, Tsukuba, Ibaraki 3058568, Japan
[4] Natl Inst Adv Ind Sci & Technol, Nanoelect Res Inst, Tsukuba, Ibaraki 3058568, Japan
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2007年 / 463卷 / 157-160期
关键词：
high-T-c superconductor; josephson junction; spin-boson model; macroscopic quantum coherence; decoherence;
D O I：
10.1016/j.physc.2007.04.322
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Decoherence of two-state systems due to superohmic damping, which is obtained in Josephson junctions made by high-T-c superconductors, is numerically studied by a quantum Monte Carlo method. By calculating a dynamical structure factor, we demonstrate a coherent-incoherent crossover by controlling both damping strength and temperature. (C) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：157 / 160
页数：4
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