Advanced Photons

Alexander I. Lvovsky, Thomas Aichele

We discuss a classical model allowing one to visualize and characterize the optical mode of the single photon generated by means of a conditional measurement on a biphoton produced in parametric down-conversion. The model is based on Klyshko's advanced wave interpretation, but extends beyond it, providing a precise mathematical description of the advanced wave. The optical mode of the conditional photon is shown to be identical to the mode of the classical difference-frequency field generated due to nonlinear interaction of the partially coherent advanced wave with the pump pulse. With this "nonlinear advanced wave model" most coherence properties of the conditional photon become manifest, which permits one to intuitively understand many recent results, in particular, in quantum imaging.

Bart Verberck

Jay Lowell

The Quantum Industry has been rapidly growing over the past several years. This talk will describe advances going on in quantum technology development in computing, sensing, and communications, provide examples of each and discuss trends in each area. A key focus will be on how advances in photonic devices and photonic integrated circuits will impact the quantum industry and fuel future advancement.

Ramil G. Usmanov, Nikolay A. Chitalin

The possibility of advance and delay effects for the light induction, one-pulse, locked, two-humped and nutation photon echo (PE) signals is shown. The primary and stimulated backward echo-signals are considered also. A possible scheme of experimental realization for the case of nutation PE is discussed.

Joachim Piprek