Location via proxy:   [ UP ]  
[Report a bug]   [Manage cookies]                

Projective Measurement of a Single Nuclear Spin Qubit by Using Two-Mode Cavity QED

Yujiro Eto, Atsushi Noguchi, Peng Zhang, Masahito Ueda, and Mikio Kozuma
Phys. Rev. Lett. 106, 160501 – Published 22 April 2011
PDFHTMLExport Citation
Abstract
Authors
Article Text
  • ACKNOWLEDGEMENTS
    • References

    Abstract

    We report the implementation of projective measurement on a single 1/2 nuclear spin of the Yb171 atom by measuring the polarization of cavity-enhanced fluorescence. To obtain cavity-enhanced fluorescence having a nuclear-spin-dependent polarization, we construct a two-mode cavity QED system, in which two cyclic transitions are independently coupled to each of the orthogonally polarized cavity modes, by manipulating the energy level of Yb171. This system can associate the nuclear spin degrees of freedom with the polarization of photons, which will facilitate the development of hybrid quantum systems.

    • Figure
    • Figure
    • Figure
    • Figure
    • Received 7 December 2010

    DOI:https://doi.org/10.1103/PhysRevLett.106.160501

    © 2011 American Physical Society

    Authors & Affiliations

    Yujiro Eto1,*, Atsushi Noguchi1,2, Peng Zhang1,†, Masahito Ueda1,3, and Mikio Kozuma1,2

    • 1ERATO Macroscopic Quantum Control Project, JST, 2-11-16 Yayoi, Bunkyo-Ku, Tokyo 113-8656, Japan
    • 2Department of Physics, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8550, Japan
    • 3Department of Physics, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan

    • *Present address: National Institute of Information and Communications Technology, 4-2-1 Nukui-kitamachi, Koganei, Tokyo 184-8795, Japan.
    • †Present address: Department of Physics, Renmin University of China, Beijing, 100872 PR China.

    Article Text (Subscription Required)

    Click to Expand

    References (Subscription Required)

    Click to Expand
    Issue

    Vol. 106, Iss. 16 — 22 April 2011

    Reuse & Permissions
    Access Options
    Author publication services for translation and copyediting assistance advertisement

    Authorization Required

    Log In
    Other Options
    ×

    Images

    • Figure 1
      Figure 1
      (a) Relevant energy-level diagram of Yb171. |↑⟩ and |↓⟩ denote the magnetic substates mI=±1/2 in the ground state of S01(I=1/2). (b) Schematic of the experimental apparatus. MOT: magneto-optical trap, λ/4 plate: quarter-wave plate, PBS: polarizing beam splitter, SPCM: single-photon-counting module.Reuse & Permissions
    • Figure 2
      Figure 2
      (a) Hyperfine spectroscopy on the D13 state of Yb171. The fluorescence from the MOT are collected by a photomultiplier while shining the light-shift beam. (b),(c) The cavity-enhanced fluorescence spectrum. The atoms are irradiated (b) without and (c) with the light-shift beam. The frequencies of both the excitation and the lock beam are simultaneously changed.Reuse & Permissions
    • Figure 3
      Figure 3
      Scattering diagrams of σ+ and σ− counts (a) without and (b) with irradiation of the light-shift beam. The squares (circles) correspond to |↑⟩ (|↓⟩).Reuse & Permissions
    • Figure 4
      Figure 4
      Fluorescence detection at the level of single atom. (a) Histograms of total counts (nto=σ++σ−) in the fluorescence detection (hatched histogram) and in the dark counts (empty histogram). (b) Histograms of difference counts (ndi=σ+−σ−) for the initial spin |↑⟩ (hatched histogram) and |↓⟩ (empty histogram). The inset shows the theoretically calculated SNR as a function of the light-shift beam power. A Gaussian profile with wl=50  μm is assumed. The cross mark is the experimental value.Reuse & Permissions
    ×

    Sign up to receive regular email alerts from Physical Review Letters

    Log In

    Cancel
    ×

    Search

    Article Lookup

    Paste a citation or DOI
    Enter a citation
    ×