Abstract

We propose a scheme for robust writing and storage of optical phase information in populations of metastable states of the atoms with a tripod structure of levels by using frequency-chirped laser pulses. The method provides much longer storage times compared with the schemes based on the collective atomic spin coherences. A negligible excitation of the atom provides immunity to decoherence induced by decay of the excited states. The method is robust against small-to-medium variations in the laser pulse intensity and speed of the chirp and, being insensitive to resonance conditions, it is effective both in homogeneously and inhomogeneously broadened media.

© 2009 Optical Society of America

Creation of a coherent superposition of quantum states by a single frequency-chirped short laser pulse

G. P. Djotyan, J. S. Bakos, G. Demeter, Zs. Sörlei, J. Szigeti, and D. Dzsotjan
J. Opt. Soc. Am. B 25(2) 166-174 (2008)

Creation of coherent superposition states in inhomogeneously broadened media with relaxation

Nora Sandor, Joseph S. Bakos, Zsuzsa Sörlei, and Gagik P. Djotyan
J. Opt. Soc. Am. B 28(11) 2785-2796 (2011)

Coherent writing and reading of information using frequency-chirped short bichromatic laser pulses

G. P. Djotyan, J. S. Bakos, and Zs. Sörlei
Opt. Express 4(2) 113-120 (1999)

Population transfer and generation of arbitrary superpositions of quantum states in a four-level system using a single-chirped laser pulse

Zhenhua Zhang, Xihua Yang, and Xiaona Yan
J. Opt. Soc. Am. B 30(4) 1017-1021 (2013)

Population transfer in three-level Λ atoms with Doppler-broadened transition lines by a single frequency-chirped short laser pulse

G. P. Djotyan, J. S. Bakos, G. Demeter, and Zs. Sörlei
J. Opt. Soc. Am. B 17(1) 107-113 (2000)