Limitations of a measurement-assisted optomechanical route to quantum macroscopicity of superposition states

被引：6

作者：

Carlisle, Andrew ^{[1
]}

Kwon, Hyukjoon ^{[2
]}

Jeong, Hyunseok ^{[2
]}

Ferraro, Alessandro ^{[1
]}

Paternostro, Mauro ^{[1
]}

机构：

[1] Queens Univ, Sch Math & Phys, Ctr Theoret Atom Mol & Opt Phys, Belfast BT7 1NN, Antrim, North Ireland

[2] Seoul Natl Univ, Dept Phys & Astron, Ctr Macroscop Quantum Control, Seoul 151742, South Korea

来源：

PHYSICAL REVIEW A | 2015年 / 92卷 / 02期

基金：

英国工程与自然科学研究理事会; 新加坡国家研究基金会;

关键词：

MOVING MIRROR; GROUND-STATE; CAVITY; RADIATION; SIZE;

D O I：

10.1103/PhysRevA.92.022123

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Optomechanics is currently believed to provide a promising route towards the achievement of genuine quantum effects at the large, massive-system scale. By using a recently proposed figure of merit that is well suited to address continuous-variable systems, in this paper we analyze the requirements needed for the state of a mechanical mode (embodied by an end-cavity cantilever or a membrane placed within an optical cavity) to be qualified as macroscopic. We show that according to the phase-space-based criterion that we have chosen for our quantitative analysis, the state achieved through strong single-photon radiation-pressure coupling to a quantized field of light and conditioned by measurements operated on the latter might be interpreted as macroscopically quantum. In general, though, genuine macroscopic quantum superpositions appear to be possible only under quite demanding experimental conditions.

引用

页数：6

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