Universal dynamics of a turbulent superfluid Bose gas

García-Orozco, Arnol D.; Madeira, Lucas; Moreno-Armijos,; Fritsch, A. R.; Tavares, P. E. S.; Castilho, P. C. M.; Cidrim, A.; Roati, G.; Bagnato, V. S.

doi:10.48550/arxiv.2107.07421

Cited by 3 publications

(9 citation statements)

References 36 publications

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“…where t 0 is a reference time and in our case α = γβ [11,14]. Such scaling, known from classical surface growth [19,20], and also seen in the relaxation dynamics of quantum gases [21][22][23][24][25], is hypothesised to be generic to far-fromequilibrium many-body quantum systems [26,27] and proposed as a way to classify them into universality classes.…”

mentioning

confidence: 93%

Emergence of isotropy and dynamic scaling in 2D wave turbulence

Gałka¹,

Christodoulou²,

Gazo³

et al. 2022

Preprint

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mentioning

confidence: 93%

Emergence of isotropy and dynamic scaling in 2D wave turbulence

Gałka¹,

Christodoulou²,

Gazo³

et al. 2022

Preprint

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“…The authors in [21] investigated the emergence of universal scaling due to the presence of NTFPs in a harmonically trapped three-dimensional Bose gas, driven to a turbulent state.…”

Section: Harmonically Trapped Three-dimensional Bose Gasmentioning

confidence: 99%

“…In the case of far-from-equilibrium initial conditions, this can be observed well before an equilibrium or a quasi-stationary state is reached. This has been investigated in a wide variety of systems such as the inflation in the early Universe [2][3][4][5][6], heavy-ion collisions producing quark-gluon matter [7][8][9][10], and coldgas systems, in both theory [5,[11][12][13][14][15][16][17] and experiments [18][19][20][21]. A universal spatio-temporal scaling emerges, independent of the initial state or microscopic parameters.…”

Section: Introductionmentioning

confidence: 99%

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Non-Thermal Fixed Points in Bose Gas Experiments

Madeira

Bagnato

2022

Symmetry

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One of the most challenging tasks in physics has been understanding the route an out-of-equilibrium system takes to its thermalized state. This problem can be particularly overwhelming when one considers a many-body quantum system. However, several recent theoretical and experimental studies have indicated that some far-from-equilibrium systems display universal dynamics when close to a so-called non-thermal fixed point (NTFP), following a rescaling of both space and time. This opens up the possibility of a general framework for studying and categorizing out-of-equilibrium phenomena into well-defined universality classes. This paper reviews the recent advances in observing NTFPs in experiments involving Bose gases. We provide a brief introduction to the theory behind this universal scaling, focusing on experimental observations of NTFPs. We present the benefits of NTFP universality classes by analogy with renormalization group theory in equilibrium critical phenomena.

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“…These include laser stirring [17,18], rotating the confining potential [19][20][21], interaction with the optical vortex [22][23][24][25], quenching through the phase transition [26], and counter-flow dynamics [27][28][29][30], just to name a few [31][32][33][34]. Theoretically, numerous intriguing aspects of three-dimensional [8,[35][36][37][38] and two-dimensional (2D) quantum turbulence (QT) [39][40][41][42][43][44][45][46][47][48][49] have been examined. Moreover, very recently developed machine learning techniques can be utilized to detect and classify quantum vortices [50,51].…”

Section: Introductionmentioning

confidence: 99%

Vortex formation and quantum turbulence with rotating paddle potentials in a two-dimensional binary Bose-Einstein condensate

Das¹,

Mukherjee²,

Majumder³

2022

Preprint

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Motivated by the recent observation of a gigantic vortex cluster in a two-dimensional Bose-Einstein condensate [Science 364, 1264[Science 364, (2019], we conduct a theoretical study of the creation and dynamics of vortices in a binary Bose-Einstein condensate with a mass imbalance between the species. To initiate the dynamics, we use one or two rotating paddle potentials in one species, while the other species is influenced only via the interspecies interaction. In both species, the number as well as the dominant sign of the vortices are determined by the rotation frequency of the paddle potential. Clusters of positive and negative vortices form at low rotation frequency comparable to that of the trap when using the single paddle potential. In contrast, vortices of the same sign tend to dominate as rotation frequency increases. When the rotation frequency is sufficiently high, the rapid annihilation of vortex-antivortex pairs significantly reduces the number of vortices in the system. For two paddle potentials rotating in the same direction, the vortex dynamics phenomenon is similar to that of a single paddle. However, when the paddle potentials are rotated in the opposite direction, both positive and negative signed vortices occur at all rotational frequencies. At low rotational frequencies, the cluster of like-signed vortices produces the k −5/3 and k −3 power laws in the incompressible kinetic energy spectrum at low and high wavenumbers, respectively, a hallmark property of the quantum turbulent flows.

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Universal dynamics of a turbulent superfluid Bose gas

Cited by 3 publications

References 36 publications

Emergence of isotropy and dynamic scaling in 2D wave turbulence

Emergence of isotropy and dynamic scaling in 2D wave turbulence

Non-Thermal Fixed Points in Bose Gas Experiments

Vortex formation and quantum turbulence with rotating paddle potentials in a two-dimensional binary Bose-Einstein condensate

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