Raman scheme for adjustable bandwidth quantum memory

Abstract

We propose a scenario of quantum memory for light based on Raman scattering. The storage medium is a vapor and the different spectral components of the incoming signal are stored in different atomic velocity classes. One uses appropriate pulses to reverse the resulting Doppler phase shift and to regenerate the signal, without distortion, in the backward direction. The different stages of the protocol are detailed and the recovery efficiency is calculated in the semi-classical picture. Since the memory bandwidth is determined by the Raman transition Doppler width, it can be adjusted by changing the angle of the signal and control beams. The optical depth also depends on the beam angle. As a consequence the available optical depth can be optimized, depending on the needed bandwidth. The predicted recovery efficiency is close to 100% for large optical depth.

21 pages, 3 figures

References in corpus (5)

• Quantum memory for squeezed light
• Mapping broadband single-photon wavepackets into an atomic memory
• Photon echoes generated by reversing magnetic field gradients in a rubidium vapour
• Photon storage in Lambda-type optically dense atomic media. III. Effects of inhomogeneous broadening
• Reversible Quantum Interface for Tunable Single-sideband Modulation

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