Bosonic quantum dynamics following colliding potential wells

Kohler, F.; Schmelcher, Peter

doi:10.1103/physreva.103.043326

Cited by 2 publications

(1 citation statement)

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“…For a single atomic species these protocols result in the oscillation of the formed dark solitons [42] or in the case of a two-component mixture in the spontaneous generation of dark-bright soliton trains [41]. Another technique to initiate atomic collisions constitutes of two counter-propagating harmonic oscillator potentials [43] which has been experimentally realized with 40 K and 87 Rb clouds utilizing two optical tweezers [44,45].…”

Section: Introductionmentioning

confidence: 99%

Counterflow dynamics of two correlated impurities immersed in a bosonic gas

Theel,

Mistakidis,

Keiler

et al. 2021

Preprint

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The counterflow many-body dynamics of two impurities in a double-well coupled to an onedimensional bosonic medium is explored. We determine the ground state phase diagram of the system according to the impurity-medium entanglement and the impurities two-body correlations. Specifically, bound impurity structures reminiscent of bipolarons for strong attractive couplings as well as configurations with two clustered or separated impurities in the repulsive case are identified. The interval of existence of these phases depends strongly on the impurity-impurity interactions and external confinement of the medium. Accordingly the impurities dynamical response, triggered by ramping down the central potential barrier, is affected by the medium's trapping geometry. In particular, for a box-confined medium repulsive impurity-medium couplings lead, due to attractive induced interactions, to the localization of the impurities around the trap center. In contrast, for a harmonically trapped medium the impurities perform a periodic collision and expansion dynamics further interpreted in terms of a two-body effective model. Our findings elucidate the correlation aspects of the collisional physics of impurities which should be accessible in recent cold atom experiments.

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