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

Abstract

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 is controllably achieved. Successively, the two manipulated spin-wave components are mapped into two orthogonal polarized optical emissions, respectively. By measuring Ramsey fringes of the retrieved optical signals, the π/2-pulse fidelity of ~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.

References in corpus (8)

• Mapping photonic entanglement into and out of a quantum memory
• Photon storage in Lambda-type optically dense atomic media. II. Free-space model
• Realisation of a programmable two-qubit quantum processor
• A Robust Atom-Photon Entanglement Source for Quantum Repeaters
• Creation of long-term coherent optical memory via controlled nonlinear interactions in Bose-Einstein condensates
• Fast Quantum State Control of a Single Trapped Neutral Atom
• Resonance beating of light stored using atomic spinor polaritons
• Quantum Interference of Stored Coherent Spin-wave Excitations in a Two-channel Memory

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