Polarization properties of long-lived stimulated photon echo

The polarization properties of the long-lived stimulated photon echo formed on the transition ja → jb with the atomic levels degenerate in the projections of the angular momenta are studied theoretically. The two particular transitions ja = 1 → jb = 0 and ja = 1 → jb = 1 with degenerate ground state...

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Bibliographic Details
Published in:Laser physics letters 2015-01, Vol.12 (1), p.16001
Main Authors: Reshetov, V A, Popov, E N
Format: Article
Language:English
Subjects:
photon echo
polarization qubit
quantum memory
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Summary:The polarization properties of the long-lived stimulated photon echo formed on the transition ja → jb with the atomic levels degenerate in the projections of the angular momenta are studied theoretically. The two particular transitions ja = 1 → jb = 0 and ja = 1 → jb = 1 with degenerate ground state ja = 1 are discussed. For the transitions ja = 1 → jb = 1 the polarizations and areas of the first ('write') and the third ('read') excitation pulses are found when the echo polarization faithfully reproduces the arbitrary polarization of the weak (single-photon) second ('information') pulse, so that this echo scheme may implement the quantum memory for a single-photon polarization qubit, while for the transitions ja = 1 → jb = 0 it is shown, that the echo polarization differs from that of the second pulse at any conditions.
ISSN:1612-2011
1612-202X
DOI:10.1088/1612-2011/12/1/016001