Excitations of a vortex line in an elongated dipolar condensate

Lee, Au-Chen; Baillie, D.; Bisset, R. N.; Blakie, P. B.

doi:10.1103/physreva.98.063620

Cited by 17 publications

(8 citation statements)

References 55 publications

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“…We briefly comment that the calculation and the measurement of the excitation spectra received much attention also in the context of in dipolar systems, both in trapped superfluid or droplet phases (Baillie et al, 2017;Petter et al, 2019) and more recently also in supersolids (Petter et al, 2020;Tanzi et al, 2019b) in the ground states and in excited states, e.g. in vortices (Cidrim et al, 2018;Lee et al, 2018;Roccuzzo et al, 2020).…”

Section: Elementary Excitationsmentioning

confidence: 99%

Long-range interacting quantum systems

Defenu,

Donner,

Macrì

et al. 2021

Preprint

108

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The presence of non-local and long-range interactions in quantum systems induces several peculiar features in their equilibrium and out-of-equilibrium behavior. In current experimental platforms control parameters such as interaction range, temperature, density and dimension can be changed. The existence of universal scaling regimes, where diverse physical systems and observables display quantitative agreement, generates a common framework, where the efforts of different research communities can be -in some cases rigorously -connected. Still, the application of this general framework to particular experimental realisations requires the identification of the regimes where the universality phenomenon is expected to appear. In the present review we summarise the recent investigations of many-body quantum systems with long-range interactions, which are currently realised in Rydberg atom arrays, dipolar systems, trapped ion setups and cold atoms in cavity experiments. Our main aim is to present and identify the common and (mostly) universal features induced by long-range interactions in the behaviour of quantum many-body systems. We will discuss both the case of very strong non-local couplings, i.e. the non-additive regime, and the one in which energy is extensive, but nevertheless low-energy, long wavelength properties are altered with respect to the short-range limit. Cases of competition with other local effects in the above mentioned setups are also reviewed.

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Section: Elementary Excitationsmentioning

confidence: 99%

Long-range interacting quantum systems

Defenu,

Donner,

Macrì

et al. 2021

Preprint

108

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“…Future works will focus on investigations of the individual vortex shape and behaviour, such as the anisotropic nature of the vortex cores for in-plane magnetic fields [30][31][32][33] , the interplay between the vortex and roton excitations [30][31][32][33][34] and exotic vortex patterns such as square lattices 29 , and investigations into anisotropic turbulence 59 . This work also opens the door to studying more complex matter under rotation, such as dipolar droplets [60][61][62] and supersolid states [41][42][43]51 . Such proposals will be challenging due to the intricate density patterns 63 ; however, such observations would provide conclusive evidence of superfluidity in supersolids.…”

mentioning

confidence: 93%

Observation of vortices and vortex stripes in a dipolar condensate

et al. 2022

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Quantized vortices are a prototypical feature of superfluidity that have been observed in multiple quantum gas experiments. But the occurrence of vortices in dipolar quantum gases—a class of ultracold gases characterized by long-range anisotropic interactions—has not been reported yet. Here we exploit the anisotropic nature of the dipole–dipole interaction of a dysprosium Bose–Einstein condensate to induce angular symmetry breaking in an otherwise cylindrically symmetric pancake-shaped trap. Tilting the magnetic field towards the radial plane deforms the cloud into an ellipsoid, which is then set into rotation. At stirring frequencies approaching the radial trap frequency, we observe the generation of dynamically unstable surface excitations, which cause angular momentum to be pumped into the system through vortices. Under continuous rotation, the vortices arrange into a stripe configuration along the field, in close agreement with numerical simulations.

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“…Future works will focus on investigations of the individual vortex shape and behaviour, such as the anisotropic nature of the vortex cores for in-plane magnetic fields [32][33][34][35] , the interplay between the vortex and roton excitations [32][33][34][35][36] , exotic vortex patterns such as square lattices 31 , and investigations into anisotropic turbulence 64 . This work also opens the door to studying more complex matter under rotation, such as dipolar droplets [65][66][67] and supersolid states [42][43][44][45] .…”

mentioning

confidence: 93%

Observation of vortices and vortex stripes in a dipolar Bose-Einstein condensate

Klaus¹,

Bland²,

Poli³

et al. 2022

Preprint

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Quantized vortices are the prototypical feature of superfluidity. Pervasive in all natural systems, vortices are yet to be observed in dipolar quantum gases. Here, we exploit the anisotropic nature of the dipole-dipole interaction of a dysprosium Bose-Einstein condensate to induce angular symmetry breaking in an otherwise cylindrically symmetric pancake-shaped trap. Tilting the magnetic field towards the radial plane deforms the cloud into an ellipsoid through magnetostriction, which is then set into rotation. At stirring frequencies approaching the radial trap frequency, we observe the generation of dynamically unstable surface excitations, which cause angular momentum to be pumped into the system through vortices. Under continuous rotation, the vortices arrange into a stripe configuration along the field-in close corroboration with simulations-realizing a long soughtafter prediction for dipolar vortices.

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Excitations of a vortex line in an elongated dipolar condensate

Cited by 17 publications

References 55 publications

Long-range interacting quantum systems

Long-range interacting quantum systems

Observation of vortices and vortex stripes in a dipolar condensate

Observation of vortices and vortex stripes in a dipolar Bose-Einstein condensate

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