Quantum information technology based on solid state qubits has created much interest in
converting quantum states from the microwave to the optical domain. Optical photons, unlike …

The efficiency of frequency up and down conversion of light in an atomic ensemble, with a
diamond level configuration, is analyzed theoretically. The conditions of pump field …

We present, experimentally and theoretically, a scheme for dressed-state
electromagnetically induced transparency (EIT) in a three-step cascade system in which a …

Entanglement states serve as the central resource for a number of important applications in
quantum information science, including quantum key distribution, quantum precision …

Time-bin encoding of photons offers a robust kind of long-distance quantum communication
over lossy channels. The diversity of material nodes in quantum networks operating at …

Frequency conversion of single photons in a nonlinear crystal is theoretically discussed.
Losses and noise are included within a Heisenberg-Langevin formalism for the propagating …

Hong-Ou-Mandel (HOM) interference with two independent photons of different wavelengths
is a primary tool for controlled transfer of quantum information across a hybrid quantum …

We describe the development and applications of a single-photon source based on a
quantum dot embedded in a semiconductor nanowire, which can be precision-tuned to …

We develop the theory to describe the generation of entangled-photon pairs in the
parametrically induced transparency regime in an ensemble of Λ atoms. A highly effective …

Quantum repeaters hold the promise to prevent the photon losses in communication
channels. Most recently, the serious efforts have been applied to achieve scalable …