Effects of quantum fluctuations on the dynamics of dipolar Bose polarons

Guebli, Nadia; Boudjemâa, Abdelâali

doi:10.1088/1361-6455/ab3623

Cited by 7 publications

(8 citation statements)

References 73 publications

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“…For γ j = 0, one can expect that impurities simply oscillate back and forth with oscillation frequency, that is exactly the frequency of the axial harmonic confinement for impurity atoms. Similar behavior holds true in a single BEC-impurity mixture [45,57].…”

Section: Dynamics Of Impurities In a Homogeneous Miscible Bathsupporting

confidence: 65%

“…From now on we consider polarons in a miscible mixture. Equation ( 11) can be solved using the following variational ansatz [26,45]…”

Section: Breathing Modesmentioning

confidence: 99%

“…At finite temperatures, the properties of polarons have been addressed using the time-dependent-Hartree-Fock-Bogoliubov (TDHFB) theory [37][38][39][40], diagrammatic approach [41][42][43], and perturbative theory [44]. Most recently, we have examined effects of quantum fluctuations on the dynamics of dipolar Bose polarons [45].…”

Section: Introductionmentioning

confidence: 99%

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Breathing modes of repulsive polarons in Bose-Bose mixtures

Boudjemaa,

Guebli,

Sekmane

et al. 2020

Preprint

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We consider impurity atoms embedded in a two-component Bose-Einstein condensate in a quasione dimensional regime. We study the effects of repulsive coupling between the impurities and Bose species on the equilibrium of the system for both miscible and immiscible mixtures by numerically solving the underlying coupled Gross-Pitaevskii equations. Our results reveal that the presence of impurities may lead to a miscible-immiscible phase transition due to the interaction of the impurities and the two condensates. Within the realm of the Bogoliubov-de Gennes equations we calculate the quantum fluctuations due to the different types of interactions. The breathing modes and the time evolution of harmonically trapped impurities in both homogeneous and inhomogeneous binary condensates are deeply discussed in the miscible case using variational and numerical means. We show in particular that the self-trapping, the miscibility and the inhomogeneity of the trapped Bose mixture may strongly modify the low-lying excitations and the dynamical properties of impurities. The presence of phonons in the homogeneous Bose mixture gives rise to the damping of breathing oscillations of impurities width.

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Section: Dynamics Of Impurities In a Homogeneous Miscible Bathsupporting

confidence: 65%

“…From now on we consider polarons in a miscible mixture. Equation ( 11) can be solved using the following variational ansatz [26,45]…”

Section: Breathing Modesmentioning

confidence: 99%

See 1 more Smart Citation

Breathing modes of repulsive polarons in Bose-Bose mixtures

Boudjemaa,

Guebli,

Sekmane

et al. 2020

Preprint

Self Cite

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“…Having established an adequate understanding of the stationary properties of polarons, a natural next step which has been very recently put forward is to investigate their nonequilibrium dynamics [40,41] revealing peculiar correlation effects [36,[40][41][42][43][44][45][46]. Indeed, the crucial involve-ment of interparticle correlations can lead to non-linear structure formation [43,47], alterations of the breathing frequency [48], the manifestation of orthogonality catastrophe phenomena [41,49,50], dissipative motion of impurities in the many-body medium [51] and also their relaxation dynamics [46,52]. Other applications address impurity transport in optical lattices [53][54][55][56], their collisional dynamics when penetrating with a finite velocity a gas of Tonks-Girardeau bosons [57][58][59][60][61], the effective control of quantum coherence [62] and investigations of three-body Effimov physics [63,64].…”

Section: Introductionmentioning

confidence: 99%

Pulse- and continuously driven many-body quantum dynamics of bosonic impurities in a Bose-Einstein condensate

Mukherjee

Mistakidis²,

Majumder

et al. 2020

Phys. Rev. A

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We unravel the periodically driven dynamics of two repulsively interacting bosonic impurities within a bosonic bath upon considering either the impact of a finite pulse or a continuous shaking of the impurities harmonic trap. Following a pulse driving of initially miscible components we reveal a variety of dynamical response regimes depending on the driving frequency. At resonant drivings the impurities decouple from their host while if exposed to a high frequency driving they remain trapped in the bosonic gas. For continuous shaking we showcase that in the resonantly driven regime the impurities oscillate back and forth within and outside the bosonic medium. In all cases, the bosonic bath is perturbed performing a collective dipole motion. Referring to an immiscible initial state we unveil that for moderate driving frequencies the impurities feature a dispersive behavior whilst for a high frequency driving they oscillate around the edges of the Thomas-Fermi background. Energy transfer processes from the impurities to their environment are encountered, especially for large driving frequencies. Additionally, coherence losses develop in the course of the evolution with the impurities predominantly moving as a pair.

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Section: Introductionmentioning

confidence: 99%

Breathing modes of repulsive polarons in Bose–Bose mixtures

Boudjemâa

Guebli

Sekmane

et al. 2020

J. Phys.: Condens. Matter

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We consider impurity atoms embedded in a two-component Bose-Einstein condensate in a quasi-one dimensional regime. We study the effects of repulsive coupling between the impurities and Bose species on the equilibrium of the system for both miscible and immiscible mixtures by numerically solving the underlying coupled Gross-Pitaevskii equations. Our results reveal that the presence of impurities may lead to a miscible-immiscible phase transition due to the interaction of the impurities and the two condensates. Within the realm of the Bogoliubov-de Gennes equations we calculate the quantum fluctuations due to the different types of interactions. The breathing modes and the time evolution of harmonically trapped impurities in both homogeneous and inhomogeneous binary condensates are deeply discussed in the miscible case using variational and numerical means. We show in particular that the self-trapping, the miscibility and the inhomogeneity of the trapped Bose mixture may strongly modify the low-lying excitations and the dynamical properties of impurities. The presence of phonons in the homogeneous Bose mixture gives rise to the damping of breathing oscillations of impurities width.

show abstract

Effects of quantum fluctuations on the dynamics of dipolar Bose polarons

Cited by 7 publications

References 73 publications

Breathing modes of repulsive polarons in Bose-Bose mixtures

Breathing modes of repulsive polarons in Bose-Bose mixtures

Pulse- and continuously driven many-body quantum dynamics of bosonic impurities in a Bose-Einstein condensate

Breathing modes of repulsive polarons in Bose–Bose mixtures

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