Stability of persistent currents in open dissipative quantum fluids

Li, Guangyao; Fraser, Michael D.; Yakimenko, A. I.; Ostrovskaya, Elena A.

doi:10.1103/physrevb.91.184518

Cited by 16 publications

(19 citation statements)

References 57 publications

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“…15,[31][32][33][34][35] For our choice of the system parameters, the linear stability analysis shows that the HS becomes modulationally (dynamically) unstable within a pump interval just above the threshold value of the pump P th [ Fig. 1(a)] (details of the analysis are given in Appendix A).…”

Section: Non-equilibrium Dynamics In the Scalar Casementioning

confidence: 99%

“…5(a) and (b). Linear stability of the steady states can be determined by the standard extension of the Bogoliubov-de Gennes analysis 15,[31][32][33][34][35]41 by considering perturbations in the polariton and reservoir fields of the form δψ ± = u ± e i(kx−ωt) +v * ± e −i(kx−iω * t)…”

Section: Non-equilibrium Dynamics In the Spinor Case A Stabilitymentioning

confidence: 99%

“…31 This effective focusing nonlinearity in the system naturally leads to MI of a spatially homogeneous state, which was established in several previous studies for both quasi-1D and 2D geometry. 15,26,[31][32][33][34][35] .…”

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confidence: 99%

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Instability-induced formation and nonequilibrium dynamics of phase defects in polariton condensates

et al. 2015

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We study, theoretically and numerically, the onset and development of modulational instability in an incoherently pumped spatially homogeneous polariton condensate. Within the framework of mean-field theory, we identify regimes of modulational instability in two cases: 1) Strong feedback between the condensate and reservoir, which may occur in scalar condensates, and 2) Parametric scattering in the presence of polarization splitting in spinor condensates. In both cases we investigate the instability induced textures in space and time including non-equilibrium dynamics of phase dislocations and vortices. In particular we discuss the mechanism of vortex destabilization and formation of spiraling waves. We also identify the presence of topological defects, which take the form of half-vortex pairs in the spinor case, giving an "eyelet" structure in intensity and dipole type structure in the spin polarization. In the modulationally stable parameter domains, we observe formation of the phase defects in the process of condensate formation from an initially spatially incoherent low-density state. In analogy to the Kibble-Zurek type scaling for nonequilibrium phase transitions, we find that the defect density scales with the pumping rate.

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Section: Non-equilibrium Dynamics In the Scalar Casementioning

confidence: 99%

Section: Non-equilibrium Dynamics In the Spinor Case A Stabilitymentioning

confidence: 99%

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Instability-induced formation and nonequilibrium dynamics of phase defects in polariton condensates

et al. 2015

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“…First, using longlifetime cavities and ring-shaped excitation it was shown that polaritons can form stochastically in one of two orbital angular momentum states [68], representing a stable persistent current [69]. Theoretically, taking orbital angular momentum states as a basis, one can consider the copying and inversion of binary information in a lattice [70].…”

Section: Bistability and Polariton Condensate Memoriesmentioning

confidence: 99%

Bosonic lasers: The state of the art (Review Article)

Kavokin

Liew

Schneider³

et al. 2016

Low Temperature Physics

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Bosonic lasers represent a new generation of coherent light sources. In contrast to conventional, fermionic, lasers they do not require inversion of electronic population and do not rely on the stimulated emission of radiation. Bosonic lasers are based on the spontaneous emission of light by condensates of bosonic quasiparticles. The first realization of bosonic lasers has been reported in semiconductor microcavities where bosonic condensates of exciton-polaritons first studied several decades ago by K.B. Tolpygo can be formed under optical or electronic pumping. In this paper we overview the recent progress in the research area of polaritonics, address the perspective of realization of polariton devices: from bosonic cascade lasers to spin transistors and switches.

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“…The experimental methods of generation and detection of polariton circular currents are discussed in Refs. [23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Persistent circular currents of exciton-polaritons in cylindrical pillar microcavities

et al. 2018

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We have experimentally observed an eddy current of exciton polaritons arising in a cylindrical GaAs/AlGaAs pillar microcavity under the nonresonant optical pumping. The polariton current manifests itself in a MachZehnder interferometry image as a characteristic spiral that occurs due to the interference of the light emitted by an exciton-polariton condensate with a reference spherical wave. We have experimentally observed the condensates with the topological charges m = +1, m = −1, and m = −2. The interference pattern corresponding to the m = −2 current represents the twin spiral emerging from the center of the micropillar. The switching between the current modes with different topological charges is achieved by a weak displacement of the pump spot.

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Stability of persistent currents in open dissipative quantum fluids

Cited by 16 publications

References 57 publications

Instability-induced formation and nonequilibrium dynamics of phase defects in polariton condensates

Instability-induced formation and nonequilibrium dynamics of phase defects in polariton condensates

Bosonic lasers: The state of the art (Review Article)

Persistent circular currents of exciton-polaritons in cylindrical pillar microcavities

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