Backaction noise in strongly interacting systems: The dc SQUID and the interacting quantum point contact

被引：15

作者：

Clerk, AA ^{[1
]}

机构：

[1] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.96.056801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the backaction noise and measurement the efficiency (i.e., noise temperature) of a dc SQUID amplifier and, equivalently, a quantum point-contact detector formed in a Luttinger liquid. Using a mapping to a dissipative tight-binding model, we show that these systems are able to reach the quantum limit even in regimes where several independent transport processes contribute to the current. We suggest how this is related to the underlying integrability of these systems.

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页数：4

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