Quantum squeezing generation versus photon localization in a disordered microcavity

We investigate theoretically the nonlinear dynamics induced by an intense pump field in a disordered planar microcavity. Through a self-consistent theory, we show how the generation of quantum optical noise squeezing is affected by the breaking of the in-plane translational invariance and the occurrence of photon localization. We find that the generation of single-mode Kerr squeezing for the ideal planar case can be prevented by disorder as a result of multimode nonlinear coupling, even when the other modes are in the vacuum state. However, the excess noise is a non-monotonous function of the disorder amplitude. In the strong localization limit, we show that the system becomes protected with respect to this fundamental coupling mechanism and that the ideal quadrature squeezing generation can be obtained

Comment on "Linear wave dynamics explains observations attributed to dark-solitons in a polariton quantum fluid"

In a recent preprint (arXiv:1401.1128v1) Cilibrizzi and co-workers report experiments and simulations showing the scattering of polaritons against a localised obstacle in a semiconductor microcavity. The authors observe in the linear excitation regime the formation of density and phase patterns reminiscent of those expected in the non-linear regime from the nucleation of dark solitons. Based on this observation, they conclude that previous theoretical and experimental reports on dark solitons in a polariton system should be revised. Here we comment why the results from Cilibrizzi et al. take place in a very different regime than previous investigations on dark soliton nucleation and do not reproduce all the signatures of its rich nonlinear phenomenology. First of all, Cilibrizzi et al. consider a particular type of radial excitation that strongly determines the observed patterns, while in previous reports the excitation has a plane-wave profile. Most importantly, the nonlinear relation between phase jump, soliton width and fluid velocity, and the existence of a critical velocity with the time-dependent formation of vortex-antivortex pairs are absent in the linear regime. In previous reports about dark soliton and half-dark soliton nucleation in a polariton fluid, the distinctive dark soliton physics is supported both by theory (analytical and numerical) and experiments (both continuous wave and pulsed excitation).Comment: 4 pages, 2 figure

Freedom of Speech: The Florida Implications of \u3cem\u3ePruneYard Shopping Center v. Robins\u3c/em\u3e

The expansion of individual liberties by courts interpreting state constitutions more broadly than the Federal Constitution has been a significant trend in recent years. In the area of free speech, the Supreme Court of California recently held that the California Constitution protects speech-related activities in shopping malls, subject to reasonable regulation. The United States Supreme Court found adequate state grounds to uphold that decision in PruneYard Shopping Center v. Robins, although the Federal Constitution does not extend so far. The author examines the series of cases culminating in PruneYard and discusses its relevance to Florida law

Freedom of Speech: The Florida Implications of \u3cem\u3ePruneYard Shopping Center v. Robins\u3c/em\u3e

The expansion of individual liberties by courts interpreting state constitutions more broadly than the Federal Constitution has been a significant trend in recent years. In the area of free speech, the Supreme Court of California recently held that the California Constitution protects speech-related activities in shopping malls, subject to reasonable regulation. The United States Supreme Court found adequate state grounds to uphold that decision in PruneYard Shopping Center v. Robins, although the Federal Constitution does not extend so far. The author examines the series of cases culminating in PruneYard and discusses its relevance to Florida law