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Contrast enhancement via shaped Raman pulses for thermal cold atom cloud interferometry

  • Yukun LuoEmail author
  • Shuhua Yan
  • Qingqing Hu
  • Aiai Jia
  • Chunhua Wei
  • Jun Yang
Regular Article

Abstract

Interferometry with thermal cold atom clouds provides high particle flux and low quantum projection noise but is limited by the rapid reduction of fringe contrast. We propose an improved method based on temporally shaped pulses to address the issue of the off-resonance dispersion and enhance the contrast. Theoretical analysis and construction principle for shaped pulses are demonstrated. The fidelity of single π and π/2 pulses as well as a complete interferometer sequence are investigated. Comparisons are ade between the traditional pulse and several alternative shaped pulses to verify the feasibility and find an efficient choice among them. Practical implementation scheme and possible error sources are also discussed. The results show a great improvement in contrast and robust phase response for high atomic temperature up to several tens of μK.

Graphical abstract

Keywords

Atomic Physics 

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Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • Yukun Luo
    • 1
    • 2
    Email author
  • Shuhua Yan
    • 1
    • 2
  • Qingqing Hu
    • 1
    • 2
  • Aiai Jia
    • 1
    • 2
  • Chunhua Wei
    • 1
    • 2
  • Jun Yang
    • 1
    • 2
  1. 1.Department of Instrument Science and TechnologyCollege of Mechatronic Engineering and Automation, National University of Defense TechnologyHunanP.R. China
  2. 2.Interdisciplinary Center for Quantum Information, National University of Defense TechnologyHunanP.R. China

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