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Frontiers in Optics

Quantum memory via phase-matching control

Olga A. Kocharovskaya, Xiwen Zhang, А. А. Калачев

Published Jan 1, 2013• 0 citations
Publisher

Abstract

We suggest a new approach to quantum memory, based on control of the phase matching via continues variation in time of the wave vector of the control field during the processes of writing and read-out of the single photon wave-packet.
DOI
10.1364/ls.2013.ltu1g.4

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We discuss a class of quantum memory (QM) scheme based on phase matching control (PMC). A single-photon wave packet can be mapped into and retrieved on demand from a long-lived spin grating in the presence of a control field, forming along with the signal field a Raman configuration, when the wave vector of the control field is continuously changed in time. Such mapping and retrieval takes place due to the phase matching condition and requires neither a variation of the amplitude of the control field nor inhomogeneous broadening of the medium. We discuss the general model of PMC QM and its specific implementation via (i) modulation of the refractive index, (ii) angular scanning of the control field, and (iii) its frequency chirp. We show that the performance of the PMC QM protocol may be as good as those realized in the gradient echo memory (GEM) but achieved with less stringent requirements on the medium. We suggest the experimental realization of PMC QM in nitrogen vacancies (NV) and silicon vacancies (SiV) in diamond as well as in rare-earth doped crystals.
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