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Title: Enhancement of spin coherence in a spin-1 Bose-Einstein condensate by dynamical decoupling approaches

Abstract

We study the enhancement of spin coherence with periodic, concatenated, or Uhrig dynamical decoupling N-pulse sequences in a spin-1 Bose-Einstein condensate, where the intrinsic dynamical instability in such a ferromagnetically interacting condensate causes spin decoherence and eventually leads to a multiple spatial-domain structure or a spin texture. Our results show that all three sequences successfully enhance the spin coherence by pushing the wave vector of the most unstable mode in the condensate to a larger value. Among the three sequences with the same number of pulses, the concatenated one shows the best performance in preserving the spin coherence. More interestingly, we find that all three sequences exactly follow the same enhancement law, k{sub -}T{sup 1/2}=c, with k{sub -} the wave vector of the most unstable mode, T the sequence period, and c a sequence-dependent constant. Such a law between k{sub -} and T is also derived analytically for an attractive scalar Bose-Einstein condensate subjected to a periodic dynamical decoupling sequence.

Authors:
; ;  [1];  [2]
  1. Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Department of Optical Science and Engineering, Fudan University, Shanghai 200433 (China)
  2. Department of Physics, Fudan University, Shanghai 200433 (China)
Publication Date:
OSTI Identifier:
22051347
Resource Type:
Journal Article
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 84; Journal Issue: 1; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1050-2947
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 74 ATOMIC AND MOLECULAR PHYSICS; BOSE-EINSTEIN CONDENSATION; DECOUPLING; DOMAIN STRUCTURE; FERROMAGNETISM; PULSES; SPIN

Citation Formats

Ning Boyuan, Zhuang Jun, Zhang Wenxian, and You, J. Q. Enhancement of spin coherence in a spin-1 Bose-Einstein condensate by dynamical decoupling approaches. United States: N. p., 2011. Web. doi:10.1103/PHYSREVA.84.013606.
Ning Boyuan, Zhuang Jun, Zhang Wenxian, & You, J. Q. Enhancement of spin coherence in a spin-1 Bose-Einstein condensate by dynamical decoupling approaches. United States. doi:10.1103/PHYSREVA.84.013606.
Ning Boyuan, Zhuang Jun, Zhang Wenxian, and You, J. Q. Fri . "Enhancement of spin coherence in a spin-1 Bose-Einstein condensate by dynamical decoupling approaches". United States. doi:10.1103/PHYSREVA.84.013606.
@article{osti_22051347,
title = {Enhancement of spin coherence in a spin-1 Bose-Einstein condensate by dynamical decoupling approaches},
author = {Ning Boyuan and Zhuang Jun and Zhang Wenxian and You, J. Q.},
abstractNote = {We study the enhancement of spin coherence with periodic, concatenated, or Uhrig dynamical decoupling N-pulse sequences in a spin-1 Bose-Einstein condensate, where the intrinsic dynamical instability in such a ferromagnetically interacting condensate causes spin decoherence and eventually leads to a multiple spatial-domain structure or a spin texture. Our results show that all three sequences successfully enhance the spin coherence by pushing the wave vector of the most unstable mode in the condensate to a larger value. Among the three sequences with the same number of pulses, the concatenated one shows the best performance in preserving the spin coherence. More interestingly, we find that all three sequences exactly follow the same enhancement law, k{sub -}T{sup 1/2}=c, with k{sub -} the wave vector of the most unstable mode, T the sequence period, and c a sequence-dependent constant. Such a law between k{sub -} and T is also derived analytically for an attractive scalar Bose-Einstein condensate subjected to a periodic dynamical decoupling sequence.},
doi = {10.1103/PHYSREVA.84.013606},
journal = {Physical Review. A},
issn = {1050-2947},
number = 1,
volume = 84,
place = {United States},
year = {2011},
month = {7}
}