Applied Physics B

, 105:197 | Cite as

Measurement schemes for the spin quadratures on an ensemble of atoms

  • R. Namiki
  • S.-I.-R. Tanaka
  • T. Takano
  • Y. Takahashi
Article

Abstract

We consider how to measure collective spin states of an atomic ensemble based on the multi-pass approaches for quantum interface between light and atoms. We find that a scheme with two passages of a light pulse through the atomic ensemble is efficient to implement the homodyne tomography of the spin state. Thereby, we propose to utilize optical pulses as a phase shifter that rotates the quadrature of the spins. This method substantially simplifies the geometry of experimental schemes.

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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • R. Namiki
    • 1
  • S.-I.-R. Tanaka
    • 1
  • T. Takano
    • 1
  • Y. Takahashi
    • 1
    • 2
  1. 1.Department of Physics, Graduate School of ScienceKyoto UniversityKyotoJapan
  2. 2.CREST, JSTSaitamaJapan

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