RT Journal Article
T1 Gradient echo memory in a tripod-like dense atomic medium
A1 Carreño Sánchez, Fernando
A1 Antón Revilla, Miguel Ángel
AB We analyze the storage and retrieval of a weak light pulse, having two orthogonally (circularly) polarized components, onto an atomic ensemble of four-level atoms of the tripod type driven by a far detuned coupling field. The atoms are subject to a longitudinal magnetic field which produces a spatially varying Zeeman splitting of the lower levels along the medium and allows for a spatial encoding of the different angular frequencies of the input pulse during the storage phase. A single reversion of the external magnetic field results in a rephasing of the dipoles and leads to the release of the stored signals. The shape of the recovered pulse is a time-reversal copy of the input pulse. The application of an additional reversion of the magnetic field during the storage phase allows the release of a copy of the input pulse without time reversal. We also show that the system may operate like an all-optical multiplexer when considering two impinging optical fields which have orthogonal components. The proposal has potential applications in quantum information processing.
PB Elsevier Science BV
SN 0030-4018
YR 2010
FD 2010-12-01
LK https://hdl.handle.net/20.500.14352/42814
UL https://hdl.handle.net/20.500.14352/42814
LA eng
NO Received 9 March 2010, Revised 28 May 2010, Accepted 1 July 2010, Available online 24 July 2010.
NO Ministerio de Ciencia e Innovación de España (MCINN)
NO Ministerio de Educación y Cultura de España (MEC)
NO Universidad Complutense de Madrid/BSCH
DS Docta Complutense
RD 11 abr 2025