Transition from vortices to solitonic vortices in trapped atomic Bose-Einstein condensates

Tsatsos, Marios C.; Edmonds, Matthew; Parker, N. G.

doi:10.1103/physreva.94.023627

Cited by 7 publications

(4 citation statements)

References 72 publications

(79 reference statements)

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“…Having discussed the early stages of the dynamics, we next examine the longer time evolution of the system where a very rich dynamics of the generated VAV pairs takes place. Let us note in passing that the GP equation has been extensively used to describe the long-time dynamics of similar setups [96,116]. Also, possible interparticle correlation effects are expected to be supressed due to the large particle number considered herein.…”

Section: Singly Quantized Vortex In Species Amentioning

confidence: 98%

Quench induced vortex-bright-soliton formation in binary Bose-Einstein condensates

Mukherjee

Mistakidis

Kevrekidis

et al. 2020

J. Phys. B: At. Mol. Opt. Phys.

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We unravel the spontaneous generation of vortex-bright-soliton structures in binary Bose-Einstein condensates with a small mass imbalance between the species confined in a two-dimensional harmonic trap where one of the two species has been segmented into two parts by a potential barrier. To trigger the dynamics the potential barrier is suddenly removed and subsequently the segments perform a counterflow dynamics. We consider a relative phase difference of π between the segments, while a singly quantized vortex may be imprinted at the center of the other species. The number of vortex structures developed within the segmented species following the merging of its segments is found to depend on the presence of an initial vortex on the other species. In particular, a π phase difference in the segmented species and a vortex in the other species result in a single vortex-bright-soliton structure. However, when the non-segmented species does not contain a vortex the counterflow dynamics of the segmented species gives rise to a vortex dipole in it accompanied by two bright solitary waves arising in the non-segmented species. Turning to strongly mass imbalanced mixtures, with a heavier segmented species, we find that the same overall dynamics takes place, while the quench-induced nonlinear excitations become more robust. Inspecting the dynamics of the angular momentum we show that it can be transferred from one species to the other, and its transfer rate can be tuned by the strength of the interspecies interactions and the mass of the atomic species.

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Section: Singly Quantized Vortex In Species Amentioning

confidence: 98%

Quench induced vortex-bright-soliton formation in binary Bose-Einstein condensates

Mukherjee

Mistakidis

Kevrekidis

et al. 2020

J. Phys. B: At. Mol. Opt. Phys.

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“…Here, we used the multiconfigurational time-dependent Hartree (MCTDH) method for bosons [23] and, in particular, its implementation MCTDH-X [40,41]. This powerful method, long known in physical chemistry for distinguishable particles [22,42], has since the advent of ultracold quantum gases proven its value for the study of the correlation properties of fragmented BECs cf., e.g., [43][44][45][46][47][48][49][50][51]. The MCTDH method constructs the manybody wavefunction as a sum of all possible configurations of distributing N particles over M time-dependent single-particle wavefunctions (orbitals).…”

Section: Many-body Formalismmentioning

confidence: 99%

Self-consistent determination of the many-body state of ultracold bosonic atoms in a one-dimensional harmonic trap

Marchukov

Fischer

2019

Annals of Physics

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We study zero-temperature quantum fluctuations in harmonically trapped one-dimensional interacting Bose gases, using the self-consistent multiconfigurational time-dependent Hartree method. We define phase fluctuations from the full single-particle density matrix by the spatial decay exponent of off-diagonal long-range order. In a regime of mesoscopic particle numbers and moderate contact couplings, we derive the spatial dependence of the amplitude of phase fluctuations, determined from the self-consistently derived shape of the field operator orbitals and Fock space orbital occupation amplitudes. It is shown that the phase fluctuations display a peak, which in turn corresponds to a dip of the first-order correlations in position space, akin to what has previously been obtained in the Tonks-Girardeau limit of very large interactions and low densities. arXiv:1701.06821v4 [cond-mat.quant-gas]

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“…By contrast, a solitonic vortex is a highly anisotropic vortex with a linear phase-singularity [1]. The potential conversion of kink solitons into these excitations is of wide interest [36][37][38][39][40][41].…”

Section: Introductionmentioning

confidence: 99%

Dynamical instability of 3D stationary and traveling planar dark solitons

Mithun

Fritsch

Spielman

et al. 2022

J. Phys.: Condens. Matter

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Here we revisit the topic of stationary and propagating solitonic excitations in self-repulsive three-dimensional Bose-Einstein condensates by quantitatively comparing theoretical analysis and associated numerical computations with our experimental results. Using fully 3d numerical simulations, we explore the existence, stability, and evolution dynamics of planar dark solitons, as well as their instability-induced decay products including solitonic vortices and vortex rings. In the trapped case and with no adjustable parameters, our numerical findings are in correspondence with experimentally observed coherent structures. Without a longitudinal trap, we identify numerically exact traveling solutions and quantify how their transverse destabilization threshold changes as a function of the solitary wave speed.

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Transition from vortices to solitonic vortices in trapped atomic Bose-Einstein condensates

Cited by 7 publications

References 72 publications

Quench induced vortex-bright-soliton formation in binary Bose-Einstein condensates

Quench induced vortex-bright-soliton formation in binary Bose-Einstein condensates

Self-consistent determination of the many-body state of ultracold bosonic atoms in a one-dimensional harmonic trap

Dynamical instability of 3D stationary and traveling planar dark solitons

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