Boosting entanglement between exciton-polaritons with on-off switching of Josephson coupling

Stefanatos, Dionisis; Paspalakis, Emmanuel

doi:10.1103/physrevb.98.035303

Cited by 8 publications

(3 citation statements)

References 47 publications

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“…Our research in this paper presents a novel approach, we can change the excitation mode of polariton BECs by adding artificial geometric structures and asymmetric potential fields.Furthermore, it can be used to manipulate the orbital angular momentum and spin-orbit coupling of polariton condensates in perovskite microcavities to control their behavior. This is beneficial for achieving polariton topological insulators, chiral polariton vortex lasers, polariton optical switches, and other devices at room temperature [24,25]. It provides important reference significance for the stable control of polariton BECs at room temperature.…”

Section: Discussionmentioning

confidence: 99%

The dynamical evolution of exciton-polaritons in asymmetric ring-step potential well

Dong,

Ren,

et al. 2024

New J. Phys.

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The exciton-polariton, a quasi-particle formed by the coupling of excitons and photons, exhibits a semi-light-semi-matter nature, inheriting the advantages of both constituents and capable of achieving Bose-Einstein condensation at room temperature. This paper investigates the evolution of superposition states of semiconductor microcavity exciton-polariton Bose-Einstein condensate (BEC) within a ring-shaped structure. By employing theoretical modeling, the time-dependent dynamics of the superposition states of exciton-polaritons bound within a unique ring-step asymmetric potential well structure are analyzed. The study reveals correlations between the potential well structure of this step-like configuration and the transitions of exciton-polariton BEC superposition states, shedding light on the evolution paths of BEC systems under specific structural influences and the fluctuation patterns of excitonic fields. These findings hold relevance for experimental manipulations of exciton-polariton superposition states within microcavities. The research demonstrates that ring-step potential well structures influence the excitation and evolution of exciton-polariton BEC superposition states, leading to transitions towards higher or lower order states. This transition is reflected macroscopically in alterations in the number and spatial distribution of interference petals in the superposition states. We consider initial states with orbital angular momentum quantum number l = 2, 3, 4, respectively. By exploiting the different structural relationships of ring-step potential wells, we achieve controlled evolutions of macroscopic occupation states, with interference petal numbers ranging from 4 to 6, 4 to 8, 6 to 8, 6 to 10, 8 to 10, 8 to 12, and 6 to 4.

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Section: Discussionmentioning

confidence: 99%

The dynamical evolution of exciton-polaritons in asymmetric ring-step potential well

Dong,

Ren,

et al. 2024

New J. Phys.

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“…During the last years, controlling entanglement in systems of time-dependent coupled harmonic oscillators has been extensively studied [3,[5][6][7][8][9][10][11]. These investigations were also motivated by experiments providing access to the ultra strong coupling (USC) regime [12,13], where the coupling is comparable to the transition frequencies of the coupled quantum systems.…”

Section: Introductionmentioning

confidence: 99%

Instability of Meissner Differential Equation and Its Relation with Photon Excitations and Entanglement in a System of Coupled Quantum Oscillators

et al. 2021

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In this work, we investigate the Schrödinger dynamics of photon excitation numbers and entanglement in a system composed by two non-resonant time-dependent coupled oscillators. By considering π periodically pumped parameters (oscillator frequencies and coupling) and using suitable transformations, we show that the quantum dynamics can be determined by two classical Meissner oscillators. We then study analytically the stability of these differential equations and the dynamics of photon excitations and entanglement in the quantum system numerically. Our analysis shows two interesting results, which can be summarized as follows: (i) Classical instability of classical analog of quantum oscillators and photon excitation numbers (expectations Nj) are strongly correlated, and (ii) photon excitations and entanglement are connected to each other. These results can be used to shed light on the link between quantum systems and their classical counterparts and provide a nice complement to the existing works studying the dynamics of coupled quantum oscillators.

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“…For example, analytical solutions for transient solutions have been obtained [16,17]. Analytical solutions have also been obtained in the aforementioned study on time-dependent coupling functions [18] and in similar studies focusing on the impact of the coupling strength between to-be-entangled subsystems [24,25]. Stationary solutions have been obtained by means of Lyapunov's equations [10,26] in combination with the entanglement measures η and E N that will be defined below or by means of other techniques [14,27].…”

mentioning

confidence: 99%

Perturbation theoretical approach to determine optomechanical entanglement in mirror-field systems

Chiangga,

Sunpatanon,

Frank

2024

EPL

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An analytical method is developed that can be applied to a large variety of optomechanical systems to study entanglement between two subsystems of interest. The method is based on a system parameter that can be considered as perturbation parameter. It is shown that the method allows researchers to draw both qualitative and quantitative conclusions about the perturbation parameter at hand. First, the conclusion can be drawn whether or not the parameter when scaled up slightly induces entanglement between the subsystems. Second, physical insights into the role of model parameters for the emergence of entanglement can be obtained based on the perturbation theoretical analytical expressions. Third, quantitative predictions of numerical simulations that so far dominate the literature in the field of optomechanical entanglement can be validated at least in the limit of the vanishing perturbation parameter.

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Boosting entanglement between exciton-polaritons with on-off switching of Josephson coupling

Cited by 8 publications

References 47 publications

The dynamical evolution of exciton-polaritons in asymmetric ring-step potential well

The dynamical evolution of exciton-polaritons in asymmetric ring-step potential well

Instability of Meissner Differential Equation and Its Relation with Photon Excitations and Entanglement in a System of Coupled Quantum Oscillators

Perturbation theoretical approach to determine optomechanical entanglement in mirror-field systems

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