During the past decade the interaction of light with multiatom ensembles has attracted much
attention as a basic building block for quantum information processing and quantum state …

Physical processes that could facilitate coherent control of light propagation are under active
exploration,,,,. In addition to their fundamental interest, these efforts are stimulated by …

We study linear and nonlinear propagations of probe and signal pulses in a multiple
quantum-well structure with a four-level, double Λ-type configuration. We show that slow …

Electromagnetically induced transparency in an optically thick, cold medium creates a
unique system where pulse-propagation velocities may be orders of magnitude less than c …

We analyze the nonlinear optical response of a four-level atomic system driven into a tripod
configuration. The large cross-Kerr nonlinearities that occur in such a system are shown to …

By investigating the third-order nonlinearity of a four-level ladder-type atomic system, it is
found that, with spontaneously generated coherence (SGC) present, the nonlinear …

The control of one light field by another, ultimately at the single photon level,,,,,,, is a
challenging task that has numerous interesting applications within nonlinear optics, and …

We propose a scheme to generate double electromagnetically induced transparency and
optimal cross-phase modulation for two slow, copropagating pulses with matched group …

Weak cross-Kerr nonlinearities between single photons and coherent states are the basis for
many applications in quantum-information processing. These nonlinearities have so far …

We investigate the Kerr and magneto-optical effects for a probe laser field with two
orthogonally polarized components, propagating in a cold Rydberg atomic gas with an …