Protecting Schrodinger cat states using feedback

被引:12
作者
Vitali, D [1 ]
Tombesi, P [1 ]
Milburn, GJ [1 ]
机构
[1] UNIV QUEENSLAND,DEPT PHYS,ST LUCIA,QLD 4072,AUSTRALIA
关键词
D O I
10.1080/095003497152311
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
A feedback model based on direct photodetection and micromaser-like atomic injection is proposed for the preservation of quantum coherence in a cavity. We show that in this way it is possible to slow down significantly the decoherence of Schrodinger cat states.
引用
收藏
页码:2033 / 2041
页数:9
相关论文
共 22 条
[11]   Applications of the Jaynes-Cummings model for the detection of nonorthogonal quantum states [J].
Sasaki, M ;
Usuda, TS ;
Hirota, O ;
Holevo, AS .
PHYSICAL REVIEW A, 1996, 53 (03) :1273-1279
[12]   PHYSICAL REALIZATION OF AN ENVIRONMENT WITH SQUEEZED QUANTUM FLUCTUATIONS VIA QUANTUM-NONDEMOLITION-MEDIATED FEEDBACK [J].
TOMBESI, P ;
VITALI, D .
PHYSICAL REVIEW A, 1994, 50 (05) :4253-4257
[13]   MACROSCOPIC COHERENCE VIA QUANTUM FEEDBACK [J].
TOMBESI, P ;
VITALI, D .
PHYSICAL REVIEW A, 1995, 51 (06) :4913-4917
[14]  
TOMBESI P, 1995, APPL PHYS B-LASERS O, V60, pS69
[15]  
VITALI D, UNPUB PHYS REV LETT
[16]  
VITALI D, UNPUB
[17]   PHASE DIFFUSION, ENTANGLED STATES, AND QUANTUM MEASUREMENTS IN THE MICROMASER [J].
WAGNER, C ;
BRECHA, RJ ;
SCHENZLE, A ;
WALTHER, H .
PHYSICAL REVIEW A, 1993, 47 (06) :5068-5079
[18]   EFFECT OF DISSIPATION ON QUANTUM COHERENCE [J].
WALLS, DF ;
MILBURN, GJ .
PHYSICAL REVIEW A, 1985, 31 (04) :2403-2408
[19]   QUANTUM-THEORY OF OPTICAL FEEDBACK VIA HOMODYNE DETECTION [J].
WISEMAN, HM ;
MILBURN, GJ .
PHYSICAL REVIEW LETTERS, 1993, 70 (05) :548-551
[20]   QUANTUM-THEORY OF CONTINUOUS FEEDBACK [J].
WISEMAN, HM .
PHYSICAL REVIEW A, 1994, 49 (03) :2133-2150