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
Atomic and Molecular Physics
Original Manuscript: June 22, 2011
Manuscript Accepted: August 11, 2011
Published: October 26, 2011
Nora Sandor, Joseph S. Bakos, Zsuzsa Sörlei, and Gagik P. Djotyan, "Creation of coherent superposition states in inhomogeneously broadened media with relaxation," J. Opt. Soc. Am. B 28, 2785-2796 (2011)