Characterisation of the dynamical quantum state of a zero temperature Bose-Einstein condensate

被引：12
作者：
Rogel-Salazar, J [1 ]
Choi, S
New, GHC
Burnett, K
机构：
[1] Univ London Imperial Coll Sci Technol & Med, Quantum Opt & Laser Sci Grp, Dept Phys, London SW7 2BW, England
[2] Univ Rochester, Dept Chem, Rochester, NY 14627 USA
[3] Univ Oxford, Dept Phys, Clarendon Lab, Oxford OX1 3PU, England
来源：
PHYSICS LETTERS A | 2002年 / 299卷 / 5-6期
基金：
英国工程与自然科学研究理事会;
关键词：
Bose-Einstein condensation; quantum state; squeezing; Schrodinger cat states;
D O I：
10.1016/S0375-9601(02)00732-6
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We describe the quantum state of a Bose-Einstein condensate at zero temperature. By evaluating the Q-function we show that the ground state of Bose-Einstein condensate under the Hartree approximation is squeezed. We find that multimode Schrodinger cat states are generated as the condensate evolves in a ballistic expansion. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：476 / 482
页数：7
相关论文
共 34 条
[1]   Macroscopic quantum interference from atomic tunnel arrays [J].
Anderson, BP ;
Kasevich, MA .
SCIENCE, 1998, 282 (5394) :1686-1689
[2]   OBSERVATION OF BOSE-EINSTEIN CONDENSATION IN A DILUTE ATOMIC VAPOR [J].
ANDERSON, MH ;
ENSHER, JR ;
MATTHEWS, MR ;
WIEMAN, CE ;
CORNELL, EA .
SCIENCE, 1995, 269 (5221) :198-201
[3]   Observation of interference between two Bose condensates [J].
Andrews, MR ;
Townsend, CG ;
Miesner, HJ ;
Durfee, DS ;
Kurn, DM ;
Ketterle, W .
SCIENCE, 1997, 275 (5300) :637-641
[4]   Why a condensate can be thought of as having a definite phase [J].
Barnett, SM ;
Burnett, K ;
Vaccaro, JA .
JOURNAL OF RESEARCH OF THE NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY, 1996, 101 (04) :593-600
[5]   Phase measurement by projection synthesis [J].
Barnett, SM ;
Pegg, DT .
PHYSICAL REVIEW LETTERS, 1996, 76 (22) :4148-4150
[6]   Q-function measurement by projection synthesis [J].
Baseia, B ;
Moussa, MHY ;
Bagnato, VS .
PHYSICS LETTERS A, 1997, 231 (5-6) :331-334
[7]   Measuring the quantum state of a Bose-Einstein condensate [J].
Bolda, EL ;
Tan, SM ;
Walls, DF .
PHYSICAL REVIEW A, 1998, 57 (06) :4686-4694
[8]   Interactions and entanglements in BECs [J].
Burnett, K ;
Choi, S ;
Davis, M ;
Dunningham, JA ;
Morgan, SA ;
Rusch, M .
COMPTES RENDUS DE L ACADEMIE DES SCIENCES SERIE IV PHYSIQUE ASTROPHYSIQUE, 2001, 2 (03) :399-406
[9]   Coherence, correlations, and collisions: What one learns about Bose-Einstein condensates from their decay [J].
Burt, EA ;
Ghrist, RW ;
Myatt, CJ ;
Holland, MJ ;
Cornell, EA ;
Wieman, CE .
PHYSICAL REVIEW LETTERS, 1997, 79 (03) :337-340
[10]  
Byrd P. F, 1971, Handbook of Elliptic Integrals for Engineers and Scientists
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