Turbulence in a trapped Bose-Einstein condensate

Seman, J. A.; Shiozaki, R. F.; Poveda-Cuevas, F. J.; Henn, E. A. L.; Magalhães, K. M. F.; Roati, G.; Telles, G. D.; Bagnato, Vanderlei Salvador

doi:10.1088/1742-6596/264/1/012004

Cited by 19 publications

(34 citation statements)

References 16 publications

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“…A question which has been much discussed in the literature (see [4][5][6]) is whether the Kolmogorov scaling observed in non-counterflow quantum turbulence [15][16][17][18][19][20][21][22][23] has a classical origin. For example, experiments in [15][16][17] studied turbulence on scales much larger than the typical vortex spacing; scales on which one expects superfluid flows to resemble those of classical fluids.…”

Section: Energy Cascade and Dissipation Mechanismmentioning

confidence: 99%

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Holographic Vortex Liquids and Superfluid Turbulence

Chesler

Liu

Adams

2013

Science

123

117

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Superfluid turbulence, often referred to as quantum turbulence, is a fascinating phenomenon for which a satisfactory theoretical framework is lacking. Holographic duality provides a systematic new approach to studying quantum turbulence by mapping the dynamics of certain quantum theories onto the dynamics of classical gravity. We use this gravitational description to numerically construct turbulent flows in a holographic superfluid in two spatial dimensions. We find that the superfluid kinetic energy spectrum obeys the Kolmogorov −5/3 scaling law, as it does for turbulent flows in normal fluids. We trace this scaling to a direct energy cascade by injecting energy at long wavelengths and watching it flow to a short-distance scale set by the vortex core size, where dissipation by vortex annihilation and vortex drag becomes efficient. This is in sharp contrast with the inverse energy cascade of normal fluid turbulence in two dimensions. We also demonstrate that the microscopic dissipation spectrum has a simple geometric interpretation.

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Section: Energy Cascade and Dissipation Mechanismmentioning

confidence: 99%

“…We focus on "non-counterflow" superfluid turbulence, which has been the subject of considerable experimental and numerical study during the last decade (see for example [15][16][17][18][19][20][21][22][23]). …”

Section: Introductionmentioning

confidence: 99%

Holographic Vortex Liquids and Superfluid Turbulence

Chesler

Liu

Adams

2013

Science

123

117

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“…24 Experimental realizations of condensed alkali-metal atoms confined by more general timedependent potentials allowed the observation not only of vortex lattices but also of quantum turbulence. 7,9,10,20 Since quantum turbulence is characterized by the presence of a self-interacting tangle of quantized vortices, the correct understanding of dynamics, formation, and stability of vortices has shown to be of paramount importance being the subject of many theoretical works. [25][26][27] In particular, the role of acoustic excitations generated by decaying multi-charged vortices in the development of turbulence is still an open question.…”

Section: Bose-einstein Condensation In Trapped Gasesmentioning

confidence: 99%

“…The linearized equations of motion can be written in a matrix form according to 9) where is the vector with components given by deviations of the variational parameters from their equilibrium values. The solution of (4.9) is a linear combination of oscillatory modes whose oscillation frequencies obey the equation…”

Section: Thomas-fermi Approximation With a Central Vortexmentioning

confidence: 99%

“…5 Experiments have observed quantum turbulence due to entanglement of vortices which is still an opened question in physics. [6][7][8][9][10] It has been demonstrated the controlled creation of Dirac monopoles in the synthetic magnetic field produced by a spinor Bose-Einstein condensate, where monopoles are identified at the termini of vortex lines within the condensate. 11 I will make a brief introduction to the Bose-Einstein condensates, and how vortices are nucleated inside them, furthermore I shall expose the system that is the subject of this thesis and our objectives.…”

Section: Introductionmentioning

confidence: 99%

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Comportamento de condensados de Bose-Einstein aprisionados, na presença de vórtices e modos coletivos

Teles¹

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Transition to quantum turbulence in finite-size superfluids

et al. 2011

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A novel concept of quantum turbulence in finite size superfluids, such as trapped bosonic atoms, is discussed. We have used an atomic 87 Rb Bose-Einstein condensate (BEC) to study the emergence of this phenomenon. In our experiment, the transition to the quantum turbulent regime is characterized by a tangled vortex lines formation, controlled by the amplitude and time duration of the excitation produced by an external oscillating field. A simple model is suggested to account for the experimental observations. The transition from the nonturbulent to the turbulent regime is a rather gradual crossover. But it takes place in a sharp enough way, allowing for the definition of an effective critical line separating the regimes. Quantum turbulence emerging in a finite-size superfluid may be a new idea helpful for revealing important features associated to turbulence, a more general and broad phenomenon. Amplitude versus elapsed time diagram of magnetically excited BEC superfluid, presenting the evolution from the nonturbulent regime, with well separated vortices, to the turbulent regimes, with tangled vortices

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Turbulence in a trapped Bose-Einstein condensate

Cited by 19 publications

References 16 publications

Holographic Vortex Liquids and Superfluid Turbulence

Holographic Vortex Liquids and Superfluid Turbulence

Comportamento de condensados de Bose-Einstein aprisionados, na presença de vórtices e modos coletivos

Transition to quantum turbulence in finite-size superfluids

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