Fundamental quantum limit to external force detection via monitoring a single harmonic oscillator or free mass

被引：2

作者：

Alter, O ^{[1
]}

Yamamoto, Y ^{[1
]}

机构：

[1] Stanford Univ, Edward L Ginzton Lab, ERATO, Quantum Fluctuat Project, Stanford, CA 94305 USA

来源：

PHYSICS LETTERS A | 1999年 / 263卷 / 4-6期

关键词：

external force detection; fundamental quantum limit; quantum measurement of a single system; quantum Zeno effect; standard quantum limit (SQL); quantum non-demolition (QND) measurement;

D O I：

10.1016/S0375-9601(99)00743-4

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We show that there is a fundamental quantum limit to external force detection via monitoring a single harmonic oscillator, which was neglected so far. This limit is equivalent to the impossibility of determining the quantum state of a single oscillator, and the quantum Zeno effect of the oscillator, and requires an exchange of at least a quantum of energy between the oscillator and the force. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：226 / 231

页数：6

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