Abstract

We propose and analyze a scheme for creation of coherent superposition of metastable states in a tripod-structured atom using frequency-chirped laser pulses with negligible excitation of the atoms. The underlying physics of the scheme is explained using the formalism of adiabatic states. We show that the proposed scheme may be equally efficient in homogeneously and Doppler-broadened media. By numerically solving the master equation for the density matrix operator, we analyze the influence of relaxation processes on the efficiency of the creation of superposition states. We show that the proposed scheme is robust against small-to-medium variations of the laser field’s parameters.

© 2011 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)

Optical phase information writing and storage in populations of metastable quantum states

G. P. Djotyan, N. Sandor, J. S. Bakos, and Zs. Sörlei
J. Opt. Soc. Am. B 26(10) 1959-1966 (2009)

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)

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)

An extremely robust strong-field control of atomic coherence

G. P. Djotyan, N. Sandor, J. S. Bakos, and Zs. Sörlei
Opt. Express 19(18) 17493-17499 (2011)