Proposal for the Creation and Optical Detection of Spin Cat States in Bose-Einstein Condensates

被引：33

作者：

Lau, Hon Wai ^{[1
,2
]}

Dutton, Zachary ^{[3
]}

Wang, Tian ^{[1
,2
]}

Simon, Christoph ^{[1
,2
]}

机构：

[1] Univ Calgary, Inst Quantum Sci & Technol, Calgary, AB T2N 1N4, Canada

[2] Univ Calgary, Dept Phys & Astron, Calgary, AB T2N 1N4, Canada

[3] Raytheon BBN Technol, Quantum Informat Proc Grp, Cambridge, MA 02138 USA

来源：

PHYSICAL REVIEW LETTERS | 2014年 / 113卷 / 09期

基金：

加拿大自然科学与工程研究理事会;

关键词：

QUANTUM-MECHANICAL SUPERPOSITIONS; GROUND-STATE; ENTANGLEMENT; LIGHT; INFORMATION; ATOM; STORAGE; MICRO; LIMIT;

D O I：

10.1103/PhysRevLett.113.090401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We propose a method to create "spin cat states," i.e., macroscopic superpositions of coherent spin states, in Bose-Einstein condensates using the Kerr nonlinearity due to atomic collisions. Based on a detailed study of atom loss, we conclude that cat sizes of hundreds of atoms should be realistic. The existence of the spin cat states can be demonstrated by optical readout. Our analysis also includes the effects of higher-order nonlinearities, atom number fluctuations, and limited readout efficiency.

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