Quantum phenomena in coherent sources

R. A. McFarlane

F. A. Vorob'ev, R. I. Sokolovskiǐ

Ronnie Kosloff, Mark A. Ratner, Gil Katz +1 more

Coherent phenomena in molecular chromophores interacting with a dissipative environment is addressed. We defined coherence by the phenomena of decoherence which collapses the system to pointer states. Coherent irreducible phenomena takes place in a time window before the system collapses. We describe a computational model: The Stochastic Surrogate Hamiltonian that can deal with such complex quantum systems. The conditions for coherent control are analyzed. A prerequisite for coherent phenomena is the ability to perform coherent control using shaped light sources. We show that weak field coherent control is enabled by interaction with the environment.

N. A. Enaki

In this paper it is examined the coherence properties among the emitted pairs of entanglement photons and its application in Communication. It is proposed novel two-photon entangled sources which take into account the coherence and collective phenomena between the photon pairs. The quantum propriety of realistic sources of powerful coherent biphoton radiation (coherent entanglement photon pairs) is analysed. The possibility of experimental applications of coherence between the entangled photons obtained in super-radiance and lasing effects in quantum communications and cryptography is proposed.

Collective