Nonclassical statistics from a polaritonic Josephson junction

Abstract

We theoretically study the emission statistics of a weakly nonlinear photonic dimer during coherent oscillations. We show that the phase and population dynamics allow to periodically meet an optimal squeezing condition resulting in a strongly nonclassical emission statistics. By considering an exciton-polariton Josephson junction driven resonantly by a pulsed classical source, we show that a sizable antibunching should emerge in such a semiconductor system where intrinsic nonclassical signatures have remained elusive to date.

Unconventional photon blockade

“…In this limit however, we expect the field in the two cavity modes to be well described by small quantum fluctuations occurring on classical field amplitudes. It is then possible to expand the photon operators asâ j = α jÎ +δâ j , where α j = â j is the coherent mean field component and δâ j are the fluctuation (noise) operators fulfilling δâ j ≈ 0 [39,40]. The classical field dynamics follows…”

“…This quantity, involving two-time correlations, is obtained by means of the quantum regression theorem [39,46]. We show in Fig.5 the g…”

“…For example, the thriving field of semiconductor microcavities [37] is now actively seeking for genuine quantum correlations [38]. Given the small single particle nonlinearity offered by excitons, a nonclassical light statistics can hardly be observed from the exciton-polariton field without relying on the UPB [39].…”

Maximizing entanglement in bosonic Josephson junctions using shortcuts to adiabaticity and optimal control

“…We assume that the BJJ is initially prepared in a separable product of coherent states y a a ñ = ñ ñ | ( ) | | ( ) 0 , 2 In this weak population limit (4), the system evolution is approximately restricted to the manifold of up to two field quanta and thus the state can be well described by the following truncated wavefunction 00 10 01 11 20 02 , 5 00 10 01 11 20 02 where ñ |ij is the state with i and j quanta in the two modes, respectively. Note that this approximation has been employed in [51,54,55]. From Schrödinger equation with ÿ=1…”

“…Here on the contrary we consider the case of weak pumping, where the occupation numbers remain small. This limit has been investigated in the context of semiconductor microcavities but with constant controls [51], mainly for their potential use as single-photon sources [52][53][54][55].…”