Dark evolution in time-varying Zeno subspace

被引：2
|
作者：
Law, CK [1 ]
机构：
[1] Chinese Univ Hong Kong, Dept Phys, Shatin, Hong Kong, Peoples R China
来源：
PHYSICAL REVIEW A | 2004年 / 70卷 / 03期
关键词：
D O I：
10.1103/PhysRevA.70.034101
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We investigate the evolution of a quantum system under the influence of sequential measurements. The measurement scheme distinguishes whether or not the system is in a specified state \f(n)> at the nth step, where \f(n)> varies with n. Dark evolution corresponds to the situation when all measurements give negative results. We show that dark evolution is unitary in the continuous measurement limit. We derive the effective Hamiltonian, and indicate how \f(n)> controls quantum state transport.
引用
收藏
页码：034101 / 1
页数：4
相关论文
共 50 条
  • [1] Communications through time-varying subspace channels
    Friedlander, Benjamin
    CONFERENCE RECORD OF THE FORTY-FIRST ASILOMAR CONFERENCE ON SIGNALS, SYSTEMS & COMPUTERS, VOLS 1-5, 2007, : 1519 - 1523
  • [2] Communications through time-varying subspace channels
    Friedlander, Benjamin
    IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS, 2008, 26 (02) : 338 - 347
  • [3] EVOLUTION IN A TIME-VARYING ENVIRONMENT
    ARMSTRONG, RA
    GILPIN, ME
    SCIENCE, 1977, 195 (4278) : 591 - 592
  • [4] A time-varying Newton algorithm for adaptive subspace tracking
    Baumann, M.
    Helmke, U.
    MATHEMATICS AND COMPUTERS IN SIMULATION, 2008, 79 (04) : 1324 - 1345
  • [5] Decaying dark matter mimicking time-varying dark energy
    Dutta, Sourish
    Scherrer, Robert J.
    PHYSICAL REVIEW D, 2010, 82 (04):
  • [6] Dark matter with time-varying leptophilic couplings
    Davoudiasl, Hooman
    PHYSICAL REVIEW D, 2009, 80 (04):
  • [7] Subspace-based identification of linear time-varying system
    Shi, Z.Y.
    Law, S.S.
    Li, H.N.
    AIAA Journal, 2007, 45 (08): : 2042 - 2050
  • [8] Order and parameter estimation of time-varying system by subspace method
    Tamaoki, Morimichi
    Akizuki, Kageo
    Oura, Kunihiko
    Electrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi), 2006, 157 (02): : 57 - 64
  • [9] Order and parameter estimation of time-varying system by subspace method
    Tamaoki, Morimichi
    Akizuki, Kageo
    Oura, Kunihiko
    ELECTRICAL ENGINEERING IN JAPAN, 2006, 157 (02) : 57 - 64
  • [10] Subspace methods for blind estimation of time-varying FIR channels
    Tsatsanis, MK
    Giannakis, GB
    IEEE TRANSACTIONS ON SIGNAL PROCESSING, 1997, 45 (12) : 3084 - 3093
12345