Damping and decoherence of a nanomechanical resonator due to a few two-level systems

被引：43

作者：

Remus, Laura G. ^{[1
]}

Blencowe, Miles P. ^{[1
]}

Tanaka, Yukihiro ^{[2
]}

机构：

[1] Dartmouth Coll, Dept Phys & Astron, Hanover, NH 03755 USA

[2] Hokkaido Univ, Dept Appl Phys, Sapporo, Hokkaido 0608628, Japan

来源：

PHYSICAL REVIEW B | 2009年 / 80卷 / 17期

基金：

美国国家科学基金会;

关键词：

beams (structures); clamps; damping; micromechanical resonators; nanomechanics; oscillators; quantum theory; resonant tunnelling; LOW-TEMPERATURES; PHONON ECHOES; QUANTUM; GLASSES; DIFFUSION; QUBIT;

D O I：

10.1103/PhysRevB.80.174103

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We consider a quantum model of a nanomechanical flexing beam resonator interacting with a bath comprising a few damped tunneling two-level systems. In contrast with a resonator interacting bilinearly with an ohmic free oscillator bath (modeling clamping loss, for example), the mechanical resonator damping is amplitude dependent, while the decoherence of quantum superpositions of mechanical position states depends only weakly on their spatial separation.

引用

页数：14

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