Coherent manipulation of spin-wave vector for polarization of photons in an atomic ensemble

Journal Article · Sat Oct 15 00:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.84.043430· OSTI ID:22095387

Shujing, Li; Zhongxiao, Xu; Haiyan, Zheng; Xingbo, Zhao; Yuelong, Wu; Hai, Wang; Changde, Xie; Kunchi, Peng ^[1]

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1. State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006 (China)

We experimentally demonstrate the manipulation of two orthogonal components of a spin wave in an atomic ensemble. Based on Raman two-photon transition and Larmor spin precession induced by magnetic field pulses, the coherent rotations between the two components of the spin wave are controllably achieved. Successively, the two manipulated spin-wave components are mapped into two orthogonal polarized optical emissions. By measuring Ramsey fringes of the retrieved optical signals, the {pi}/2-pulse fidelity of {approx}96% is obtained. The presented manipulation scheme can be used to build an arbitrary rotation for qubit operations in quantum information processing based on atomic ensembles.

• OSTI ID: 22095387
• Journal Information: Physical Review. A, Vol. 84, Issue 4; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
EMISSION
MAGNETIC FIELDS
PHOTONS
POLARIZATION
PRECESSION
PULSES
QUANTUM INFORMATION
ROTATION
SIGNALS
SPIN
SPIN WAVES