Quantum optics with interacting polaritons

Abstract

PACS 42.50. Dv, 42.50.Nn, 71.35.Gg, 71.36.+c Recent theoretical and experimental investigations evidencing quantum optical effects in semiconductor microcavities are reported. In particular the results of an experiment that probes polariton quantum correlations by exploiting quantum complementarity are described. In this experiment, it has been shown that polaritons in two distinct idler modes interfere if and only if they share the same signal mode so that which-way information cannot be gathered, according to Bohr's quantum complementarity principle. The experimental results prove the existence of polariton pair correlations that store the which-way information. This interpretation is confirmed by a theoretical analysis of the measured interference visibility in terms of quantum Langevin equations. The devised experimental scheme employs two frequencydegenerate mutually-coherent pump modes. It is shown that this kind of two-pump parametric schemes can be exploited to realize a number of interesting tasks as the emission of polarization-entangled cavitypolariton states and the coherent control and trapping of parametric amplification in SMCs.

Quantum optics in semiconductor microcavities

“…We also applied our microscopic description for the calculation of the time-resolved visibility measured in a whichway experiments with polaritons. Further applications to the analysis of polarization entanglement between polaritons are under current development [14].…”

“…The devised experimental scheme employed two frequency -degenerate mutually-coherent pump modes. Twopump schemes can also be exploited to realize a number of interesting tasks as the emission of spin-entangled cavitypolariton states [14] and polariton multiparticle entanglement in SMCs. Recently an analogous two-pump scheme has been used to generate a two correlated polariton populations [15].…”

Entanglement and parametric dynamics in quantum optics with interacting polaritons

“…[5] measurements of twoparticles correlations for polarization-entanglement of bulk-CuCl photon pairs. Theoretical analysis [14] gives strong expectations that SMC signal-idler polariton pairs show analogous entanglement properties in polarization even without the need of excitation of bound biexcitons.…”