Coherence rephasing combined with spin-wave storage using chirped control pulses

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Abstract

Photon-echo based optical quantum memory schemes often employ intermediate steps to transform optical coherences to spin coherences for longer storage times. We analyze a scheme that uses three identical chirped control pulses for coherence rephasing in an inhomogeneously broadened ensemble of three-level Λ systems. The pulses induce a cyclic permutation of the atomic populations in the adiabatic regime. Optical coherences created by a signal pulse are stored as spin coherences at an intermediate time interval, and are rephased for echo emission when the ensemble is returned to the initial state. Echo emission during a possible partial rephasing when the medium is inverted can be suppressed with an appropriate choice of control pulse wave vectors. We demonstrate that the scheme works in an optically dense ensemble, despite control pulse distortions during propagation. It integrates conveniently the spin-wave storage step into memory schemes based on a second rephasing of the atomic coherences.

Original languageEnglish
Article number063806
JournalPhysical Review A
Volume89
Issue number6
DOIs
Publication statusPublished - Jun 11 2014

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ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Coherence rephasing combined with spin-wave storage using chirped control pulses. / Demeter, G.

In: Physical Review A, Vol. 89, No. 6, 063806, 11.06.2014.

Research output: Contribution to journalArticle

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