233 citations · 970 across the 21 of their papers we have counts for
19 papers · 1 filter
Shear-Induced Decaying Turbulence in Bose-Einstein Condensates
Simeon Simjanovski, Guillaume Gauthier, Halina Rubinsztein-Dunlop +2
We study the creation and breakdown of a quantized vortex shear layer forming between a stationary Bose-Einstein condensate and a stirred-in persistent current. Once turbulence is…
Emergent Universal Drag Law in a Model of Superflow
Maarten T. M. Christenhusz, Arghavan Safavi-Naini, Halina Rubinsztein-Dunlop +2
Despite the fundamentally different dissipation mechanisms, many laws and phenomena of classical turbulence equivalently manifest in quantum turbulence. The Reynolds law of dynamic…
Melting of a vortex matter Wigner crystal
Tyler W. Neely, Guillaume Gauthier, Charles Glasspool +2
The two-dimensional One-Component Plasma (OCP) is a foundational model of the statistical mechanics of interacting particles, describing phenomena common to astrophysics, turbulenc…
Nonequilibrium Transport in a Superfluid Josephson Junction Chain: Is There Negative Differential Conductivity?
Samuel E. Begg, Matthew J. Davis, Matthew T. Reeves
We consider the far-from-equilibrium quantum transport dynamics in a 1D Josephson junction chain of multi-mode Bose-Einstein condensates. We develop a theoretical model to examine…
Dynamical mechanisms of vortex pinning in superfluid thin films
Oliver R. Stockdale, Matthew T. Reeves, Matthew J. Davis
We characterize the mechanisms of vortex pinning in a superfluid thin film described by the two-dimensional Gross-Pitaevskii equation. We consider a vortex "scattering experiment"…
Bistability and nonequilibrium condensation in a driven-dissipative Josephson array: a c-field model
Matthew T. Reeves, Matthew J. Davis
Developing theoretical models for nonequilibrium quantum systems poses significant challenges. Here we develop and study a multimode model of a driven-dissipative Josephson junctio…
Turbulent relaxation to equilibrium in a two-dimensional quantum vortex gas
Matthew T. Reeves, Kwan Goddard-Lee, Guillaume Gauthier +9
We experimentally study emergence of microcanonical equilibrium states in the turbulent relaxation dynamics of a two-dimensional chiral vortex gas. Same-sign vortices are injected…
Neutral vortex necklace in a trapped planar superfluid
M. M. Cawte, M. T. Reeves, A. S. Bradley
We study quantum vortex states consisting of a ring of vortices with alternating sign, in a homogeneous superfluid confined to a circular domain. We find an exact stationary soluti…
Floquet analysis of time-averaged trapping potentials
Oliver A. D. Sandberg, Matthew T. Reeves, Matthew J. Davis
Time-averaged trapping potentials have played an important role in the development of the field of ultracold atoms. Despite their widespread application, there is not yet a complet…
Quantitative acoustic models for superfluid circuits
Guillaume Gauthier, Stuart S. Szigeti, Matthew T. Reeves +5
We experimentally realize a highly tunable superfluid oscillator circuit in a quantum gas of ultracold atoms and develop and verify a simple lumped-element description of this circ…
Giant Vortex Clusters in a Two-Dimensional Quantum Fluid
Guillaume Gauthier, Matthew T. Reeves, Xiaoquan Yu +6
Adding energy to a system through transient stirring usually leads to more disorder. In contrast, point-like vortices in a bounded two-dimensional fluid are predicted to reorder ab…
Enstrophy Cascade in Decaying Two-Dimensional Quantum Turbulence
M. T. Reeves, T. P. Billam, X. Yu +1
We report evidence for an enstrophy cascade in large-scale point-vortex simulations of decaying two-dimensional quantum turbulence. Devising a method to generate quantum vortex con…
Theory of the vortex-clustering transition in a confined two-dimensional quantum fluid
Xiaoquan Yu, Thomas P. Billam, Jun Nian +2
Clustering of like-sign vortices in a planar bounded domain is known to occur at negative temperature, a phenomenon that Onsager demonstrated to be a consequence of bounded phase s…
Identifying a superfluid Reynolds number via dynamical similarity
M. T. Reeves, T. P. Billam, B. P. Anderson +1
The Reynolds number provides a characterization of the transition to turbulent flow, with wide application in classical fluid dynamics. Identifying such a parameter in superfluid s…
Spectral energy transport in two-dimensional quantum vortex dynamics
T. P. Billam, M. T. Reeves, A. S. Bradley
We explore the possible regimes of decaying two-dimensional quantum turbulence, and elucidate the nature of spectral energy transport by introducing a dissipative point-vortex mode…
Signatures of Coherent Vortex Structures in a Disordered 2D Quantum Fluid
Matthew T. Reeves, Thomas P. Billam, Brian P. Anderson +1
The emergence of coherent rotating structures is a phenomenon characteristic of both classical and quantum 2D turbulence. In this work we show theoretically that the coherent vorte…
Onsager-Kraichnan Condensation in Decaying Two-Dimensional Quantum Turbulence
Thomas P. Billam, Matthew T. Reeves, Brian P. Anderson +1
Despite the prominence of Onsager's point-vortex model as a statistical description of 2D classical turbulence, a first-principles development of the model for a realistic superflu…
Classical and quantum regimes of two-dimensional turbulence in trapped Bose-Einstein condensates
M. T. Reeves, B. P. Anderson, A. S. Bradley
We investigate two-dimensional turbulence in finite-temperature trapped Bose-Einstein condensates within damped Gross-Pitaevskii theory. Turbulence is produced via circular motion…
Inverse Energy Cascade in Forced 2D Quantum Turbulence
Matthew T. Reeves, Thomas P. Billam, Brian P. Anderson +1
We demonstrate an inverse energy cascade in a minimal model of forced 2D quantum vortex turbulence. We simulate the Gross-Pitaevskii equation for a moving superfluid subject to for…