Qubits Based on Polariton Rabi Oscillators

Demirchyan, Sevak; Chestnov, I. Yu.; Alodjants, A. P.; Glazov, M. M.; Kavokin, A. V.

doi:10.1103/physrevlett.112.196403

Cited by 59 publications

(53 citation statements)

References 37 publications

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“…The influence of Josephson effect occurring in the nonlinear regime on polarization dynamics and spontaneous spatial separation of exciton-polariton condensates with opposite polarization has been predicted 47 . At present, the main discussion is focused on the possibility of time enhancement of coherent oscillations occurring in coupled exciton-photon condensate system [48][49][50] . It has been proposed that long-lived oscillations could be obtained essentially due to open character of excitonpolariton systems and interaction with pumped reservoir.…”

Section: Introductionmentioning

confidence: 99%

Oscillatory dynamics of nonequilibrium dissipative exciton-polariton condensates in weak-contrast lattices

Chestnov

Charukhchyan

et al. 2015

Phys. Rev. B

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We study nonlinear dynamics of exciton-polaritons in an incoherently pumped semiconductor microcavity with embedded weak-contrast lattice and coupled to an exciton reservoir. We elucidate fundamental features of non-equilibrium exciton-polariton condensate trapped in one-dimensional periodical potential close to zero momentum (so-called 'Zero-state') and to the state at the boundary of Brillouin zone ('π-state'). Within the framework of the mean-field theory, we identify different regimes of both relaxation and oscillatory dynamics of coherent exciton-polaritons governed by superpositions of Bloch eigenstates within the periodic lattice. In particular, we theoretically demonstrate stable macroscopical oscillations, akin to nonlinear Josephson oscillations, between different spectral components of a polariton condensate in the momenta-space. We elucidate a strong influence of the dissipative effects and the feedback induced by the inhomogeneity of incoherent reservoir on the dynamics of the coherent polaritons.

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Section: Introductionmentioning

confidence: 99%

Oscillatory dynamics of nonequilibrium dissipative exciton-polariton condensates in weak-contrast lattices

Chestnov

Charukhchyan

et al. 2015

Phys. Rev. B

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“…In recent years, there has been an increasing number of proposals to use microcavity polaritons as a source of single photons [2,3], entangled photons [4][5][6][7][8], and as quantum computing devices [9][10][11][12]. On the one hand, the interest for using polaritons lies in their peculiar dispersion that weakens phonon scattering [13][14][15][16] or their ability to overcome dephasing by increasing the number of particles in the condensate [9,11].…”

Section: Introductionmentioning

confidence: 99%

Reservoir-induced decoherence of resonantly excited confined polaritons

et al. 2017

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We report on the effect of decoherence on polariton bistability. The polariton hysteresis loop is shown to collapse in a similar way when increasing the temperature or under nonresonant excitation power. The hysteresis upward threshold is pulled to lower excitation power, whereas the downward threshold remains almost constant. This effect is explained by the population of an incoherent reservoir that induces dephasing and repulsive interaction that saturates at large densities. All experimental findings are accurately simulated with the excitonic Bloch equations and indicate that reservoir-induced dephasing can be dominant over the reservoir-induced energy blueshift.

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“…Bose condensation has been demonstrated [14][15][16][17][18][19][20][21] and many features of the polariton Bose condensate such as superfluidity 22,23 , vortices [24][25][26][27][28][29][30][31][32][33][34][35] and solitons [36][37][38][39] formation were studied, and have been shown to have specific character in the non-equilibrium spatially inhomogenious system of exciton polaritons. Recently, novel phenomena such as ballistic transport over macroscopic distances 40,41 , spontaneous oscillations [42][43][44] , Josephson-like effects [45][46][47][48][49][50][51] , optical Aharonov-Bohm 52 and spin Hall effects 53 are actively discussed.…”

Section: Introductionmentioning

confidence: 99%

Coupled exciton-photon Bose condensate in path integral formalism

Elistratov¹,

Lozovik

2016

Phys. Rev. B

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We study the behavior of exciton polaritons in an optical microcavity with an embedded semiconductor quantum well. We use two-component exciton-photon approach formulated in terms of path integral formalism. In order to describe spatial distributions of the exciton and photon condensate densities, the two coupled equations of the Gross-Pitaevskii type are derived. For a homogeneous system, we find the noncondensate photon and exciton spectra, calculate the coefficients of transformation from the exciton-photon basis to the lower-upper polariton basis, and obtain the exciton and photon occupation numbers of the lower and upper polariton branches for nonzero temperatures. For an inhomogeneous system, the set of coupled equations of the Bogoliubov-de-Gennes type is derived. The equations govern the spectra and spatial distributions of noncondensate photons and excitons.

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Qubits Based on Polariton Rabi Oscillators

Cited by 59 publications

References 37 publications

Oscillatory dynamics of nonequilibrium dissipative exciton-polariton condensates in weak-contrast lattices

Oscillatory dynamics of nonequilibrium dissipative exciton-polariton condensates in weak-contrast lattices

Reservoir-induced decoherence of resonantly excited confined polaritons

Coupled exciton-photon Bose condensate in path integral formalism

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