Scientific Results

Two-color quantum memory in double-Lambda media

Year: 2012

Authors: Viscor D., Ahufinger V., Mompart J., Zavatta A., La Rocca GC., Artoni M.

Autors Affiliation: Departament de Fısica, Universitat Autonoma de Barcelona, E-08193 Bellaterra, Spain;
European Laboratory for Nonlinear Spectroscopy (LENS), Via Nello Carrara 1, I-50019 Sesto Fiorentino (Florence), Italy;
Istituto Nazionale di Ottica, INO-CNR, L.go E. Fermi, 6, I-50125, Florence, Italy;
Scuola Normale Superiore and CNISM, Piazza dei Cavalieri, 56126 Pisa, Italy;
Department of Physics and Chemistry of Materials CNR-IDASC Sensor Lab, Brescia University, Brescia, Italy

Abstract: We propose a quantum memory for a single-photon wave packet in a superposition of two different colors, i.e., two different frequency components, using the electromagnetically induced transparency technique in a double-Lambda system. We examine a specific configuration in which the two frequency components are able to exchange energy through a four-wave mixing process as they propagate, so the state of the incident photon is recovered periodically at certain positions in the medium. We investigate the propagation dynamics as a function of the relative phase between the coupling beams and the input single-photon frequency components. Moreover, by considering time-dependent coupling beams, we numerically simulate the storage and retrieval of a two-frequency-component single-photon qubit.

Journal/Review: PHYSICAL REVIEW A

Volume: 86 (5)      Pages from: 053827  to: 053827

More Information: The authors gratefully acknowledge discussions with Alessandro Ferraro, Yury Loiko, Jin Hui Wu, and Sylwia Zielinska, and financial support through Spanish MICINN contracts FIS2008-02425, FIS2011-23719, CSD2006-00019, and HI2008-0238, the Italian Ministry MIUR through the Azione Integrata IT09L244H5, the 2011 Fondo di Ateneo of the Brescia University, and the Catalan Government contract SGR2009-00347. A.Z. acknowledge support by Ente Cassa di Risparmio di Firenze, Regione Toscana, under project CTOTUS, and the EU under ERA-NET CHIST-ERA project QSCALE.
KeyWords: Coupling beam; Different frequency; Electromagnetically induced transparency; Exchange energy; Frequency components; Propagation dynamics; Quantum memories; Relative phase; Single-photon qubit; Single-photon wave packets; Storage and retrievals; Time-dependent; Two-color, Wave packets, Particle beams
DOI: 10.1103/PhysRevA.86.053827

Citations: 7
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