Spontaneous generation of dark-bright and dark-antidark solitons upon quenching a particle-imbalanced bosonic mixture

Kiehn, Hannes; Mistakidis, S. I.; Katsimiga, G. C.; Schmelcher, Peter

doi:10.1103/physreva.100.023613

Cited by 28 publications

(41 citation statements)

References 104 publications

(187 reference statements)

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“…A similar mechanism takes place also herein where we can identify the existence of sound waves by measuring their velocity at the center of the trap being larger than u 0.95 c . The above-described dynamical response of the impurity and the BEC taking place at these negative interspecies interactions can be qualitatively understood by invoking an effective potential picture [24,84]. Indeed, the effective potential acting on the BEC consists of the external harmonic oscillator and the instantaneous density of the impurity namely…”

Section: Density Evolution and Effective Picturementioning

confidence: 99%

Dissipative correlated dynamics of a moving impurity immersed in a Bose–Einstein condensate

Mistakidis¹,

Grusdt

Koutentakis³

et al. 2019

New J. Phys.

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We unravel the nonequilibrium correlated quantum quench dynamics of an impurity traveling through a harmonically confined Bose-Einstein condensate in one-dimension. For weak repulsive interspecies interactions the impurity oscillates within the bosonic gas. At strong repulsions and depending on its prequench position the impurity moves towards an edge of the bosonic medium and subsequently equilibrates. This equilibration being present independently of the initial velocity, the position and the mass of the impurity is inherently related to the generation of entanglement in the many-body system. Focusing on attractive interactions the impurity performs a damped oscillatory motion within the bosonic bath, a behavior that becomes more evident for stronger attractions. To elucidate our understanding of the dynamics an effective potential picture is constructed. The effective mass of the emergent quasiparticle is measured and found to be generically larger than the bare one, especially for strong attractions. In all cases, a transfer of energy from the impurity to the bosonic medium takes place. Finally, by averaging over a sample of simulated in situ single-shot images we expose how the singleparticle density distributions and the two-body interspecies correlations can be probed.

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Section: Density Evolution and Effective Picturementioning

confidence: 99%

Dissipative correlated dynamics of a moving impurity immersed in a Bose–Einstein condensate

Mistakidis¹,

Grusdt

Koutentakis³

et al. 2019

New J. Phys.

Self Cite

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show abstract

“…Furthermore, we remark that equation (5) is a species mean-field effective potential and, therefore, only assumes a single product state. Even though we have seen in figure 5 that the entanglement between the subsystems plays a crucial role this ansatz turns out to be a powerful tool to analyze the basic aspects of the tunneling behavior of the impurity and gives an intuitive understanding [12,46,91]. ) at x B = 0.…”

Section: Construction Of the Effective Potentialmentioning

confidence: 99%

Entanglement-assisted tunneling dynamics of impurities in a double well immersed in a bath of lattice trapped bosons

et al. 2020

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We unravel the correlated tunneling dynamics of an impurity trapped in a double well and interacting repulsively with a majority species of lattice trapped bosons. Upon quenching the tilt of the double well it is found that the quench-induced tunneling dynamics depends crucially on the interspecies interaction strength and the presence of entanglement inherent in the system. In particular, for weak couplings the impurity performs a rather irregular tunneling process in the double well. Increasing the interspecies coupling it is possible to control the response of the impurity which undergoes a delayed tunneling while the majority species effectively acts as a material barrier. For very strong interspecies interaction strengths the impurity exhibits a self-trapping behavior. We showcase that a similar tunneling dynamics takes place for two weakly interacting impurities and identify its underlying transport mechanisms in terms of pair and single-particle tunneling processes.

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“…interacting, g II =0.2, impurities following a quench to (c) The Bose-Bose mixture consists of N B =100 atoms and N I =2 impurities with g BB =0.5 and it is trapped in a harmonic oscillator potential. time-averaged effective potential created by the harmonic oscillator and the density of the bosonic gas[35,51,73,75] namely¯( The averaging process aims to eliminate the emergent very weak distortions on the instantaneous density of the BEC and it is performed herein over T=100. These distortions being a consequence of the motion of the impurities within the BEC are imprinted as a slow and very weak amplitude breathing motion of br , hardly visible infigure 5(a).…”

mentioning

confidence: 99%

Many-body quantum dynamics and induced correlations of Bose polarons

Mistakidis¹,

Koutentakis

Katsimiga³

et al. 2020

New J. Phys.

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123

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We study the ground state properties and non-equilibrium dynamics of two spinor bosonic impurities immersed in a one-dimensional bosonic gas upon applying an interspecies interaction quench. For the ground state of two non-interacting impurities we reveal signatures of attractive induced interactions in both cases of attractive or repulsive interspecies interactions, while a weak impurityimpurity repulsion forces the impurities to stay apart. Turning to the quench dynamics we inspect the time-evolution of the contrast unveiling the existence, dynamical deformation and the orthogonality catastrophe of Bose polarons. We find that for an increasing postquench repulsion the impurities reside in a superposition of two distinct two-body configurations while at strong repulsions their corresponding two-body correlation patterns show a spatially delocalized behavior evincing the involvement of higher excited states. For attractive interspecies couplings, the impurities exhibit a tendency to localize at the origin and remarkably for strong attractions they experience a mutual attraction on the two-body level that is imprinted as a density hump on the bosonic bath.

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Spontaneous generation of dark-bright and dark-antidark solitons upon quenching a particle-imbalanced bosonic mixture

Cited by 28 publications

References 104 publications

Dissipative correlated dynamics of a moving impurity immersed in a Bose–Einstein condensate

Dissipative correlated dynamics of a moving impurity immersed in a Bose–Einstein condensate

Entanglement-assisted tunneling dynamics of impurities in a double well immersed in a bath of lattice trapped bosons

Many-body quantum dynamics and induced correlations of Bose polarons

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