Bose polaron in a quantum fluid of light

Vashisht, Amit; Richard, Maxime; Minguzzi, Anna

doi:10.21468/scipostphys.12.1.008

Cited by 6 publications

(3 citation statements)

References 80 publications

(99 reference statements)

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“…Despite the intrinsic interest in twodimensional polaron-polaritons, most theoretical efforts have been devoted to research concerning Fermi polaron excitons [68][69][70][71][72][73][74], and Fermi exciton-polaritons [75][76][77][78]. Fewer efforts have been directed to the Bose polaron-polariton [79][80][81][82][83][84][85].…”

Section: Introductionmentioning

confidence: 99%

Strongly Interacting Bose Polarons in Two-Dimensional Atomic Gases and Quantum Fluids of Polaritons

Cárdenas-Castillo

Camacho-Guardián

2022

Atoms

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Polarons are quasiparticles relevant across many fields in physics: from condensed matter to atomic physics. Here, we study the quasiparticle properties of two-dimensional strongly interacting Bose polarons in atomic Bose–Einstein condensates and polariton gases. Our studies are based on the non-self consistent T-matrix approximation adapted to these physical systems. For the atomic case, we study the spectral and quasiparticle properties of the polaron in the presence of a magnetic Feshbach resonance. We show the presence of two polaron branches: an attractive polaron, a low-lying state that appears as a well-defined quasiparticle for weak attractive interactions, and a repulsive polaron, a metastable state that becomes the dominant branch at weak repulsive interactions. In addition, we study a polaron arising from the dressing of a single itinerant electron by a quantum fluid of polaritons in a semiconductor microcavity. We demonstrate the persistence of the two polaron branches whose properties can be controlled over a wide range of parameters by tuning the cavity mode.

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Section: Introductionmentioning

confidence: 99%

Strongly Interacting Bose Polarons in Two-Dimensional Atomic Gases and Quantum Fluids of Polaritons

Cárdenas-Castillo

Camacho-Guardián

2022

Atoms

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“…In condensed matter systems, recent experiments with cavity-coupled monolayer semiconductors have reported the realization of the first strongly interacting two-dimensional polarons in the context of polaron-polaritons [56][57][58][59]. The underlying character of these quasiparticles has unveiled new questions to understand polaron physics for open systems [60,61], photon bound states [62,63], and few-body states of polaritons [64]. Furthermore, the recent developments with two-dimensional van der Waals heterostructures place quantum gases into new territories where polaron physics and Bose-Fermi mixtures are being realized with control and tunability [65] with excitons and charge carriers (electrons and holes).…”

Section: Introductionmentioning

confidence: 99%

Lattice polaron in a Bose–Einstein condensate of hard-core bosons

Santiago-García,

Castillo-López,

Camacho-Guardian

2024

New J. Phys.

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Lattice polarons, quasiparticles arising from the interaction between an impurity and its surrounding bosonic environment confined to a lattice system, have emerged as a platform for generating complex few-body states, probing many-body phenomena, and addressing long-standing problems in physics. In this study, we employ a variational ansatz to investigate the quasiparticle and spectral properties of an impurity coupled to a condensate gas of hard-core bosons in a two-dimensional optical lattice. Our findings demonstrate that the polaron features can be tuned by adjusting the filling factor of the bath, revealing intriguing polaron characteristics in the strongly interacting regime. These results offer valuable insights for lattice polaron experiments with ultracold gases and can serve as a guide for new experiments in emergent quantum devices, such as moiré materials, where optical excitations can be described in terms of hard-core bosons.

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“…Numerous theoretical studies [ 13 , 14 , 15 , 16 , 17 , 18 , 19 ] have already been carried out to study the interaction mechanism between the impurity and the excitations. These studies, however, mainly involve linear excitations and an impurity with an infinite mass [ 13 , 14 , 15 , 16 , 17 , 18 , 19 ] or finite effective mass [ 20 ]. Thus, it is highly desired to study the interaction mechanism between a quantum impurity with a finite effective mass and nonlinear excitations, such as the soliton, which is not only a key ingredient in the effective field theory, but also plays an important role in information processing [ 21 ].…”

Section: Introductionmentioning

confidence: 99%

Interaction between an Impurity and Nonlinear Excitations in a Polariton Condensate

Chun-yu

Liang

2022

Entropy

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Exploring the dynamics of a mobile impurity immersed in field excitations is challenging, as it requires to account for the entanglement between the impurity and the surrounding excitations. To this end, the impurity’s effective mass has to be considered as finite, rather than infinite. Here, we theoretically investigate the interaction between a finite-mass impurity and a dissipative soliton representing nonlinear excitations in the polariton Bose–Einstein condensate (BEC). Using the Lagrange variational method and the open-dissipative Gross–Pitaevskii equation, we analytically derive the interaction phase diagram between the impurity and a dissipative bright soliton in the polariton BEC. Depending on the impurity mass, we find the dissipative soliton colliding with the impurity can transmit through, get trapped, or be reflected. This work opens a new perspective in understanding the impurity dynamics when immersed in field excitations, as well as potential applications in information processing with polariton solitons.

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Bose polaron in a quantum fluid of light

Cited by 6 publications

References 80 publications

Strongly Interacting Bose Polarons in Two-Dimensional Atomic Gases and Quantum Fluids of Polaritons

Strongly Interacting Bose Polarons in Two-Dimensional Atomic Gases and Quantum Fluids of Polaritons

Lattice polaron in a Bose–Einstein condensate of hard-core bosons

Interaction between an Impurity and Nonlinear Excitations in a Polariton Condensate

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