Matthew T. Reeves
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View article: Nonlinear wave dynamics on a chip
Nonlinear wave dynamics on a chip Open
Shallow water waves are a striking example of nonlinear hydrodynamics, giving rise to phenomena such as tsunamis and undular waves. These dynamics are typically studied in hundreds-of-meter-long wave flumes. Here, we demonstrate a chip-sca…
View article: Shear-Induced Decaying Turbulence in Bose-Einstein Condensates
Shear-Induced Decaying Turbulence in Bose-Einstein Condensates Open
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 established, we characterize the progressive clustering of …
View article: Emergent Universal Drag Law in a Model of Superflow
Emergent Universal Drag Law in a Model of Superflow Open
Despite the fundamentally different dissipation mechanisms, many laws and phenomena of classical turbulence equivalently manifest in quantum turbulence. The Reynolds law of dynamical similarity states that two objects of same geometry acro…
View article: Melting of a vortex matter Wigner crystal
Melting of a vortex matter Wigner crystal Open
The two-dimensional One-Component Plasma (OCP) is a foundational model of the statistical mechanics of interacting particles, describing phenomena common to astrophysics, turbulence, and the Fractional Quantum Hall Effect (FQHE). Despite a…
View article: Nonequilibrium Transport in a Superfluid Josephson Junction Chain: Is There Negative Differential Conductivity?
Nonequilibrium Transport in a Superfluid Josephson Junction Chain: Is There Negative Differential Conductivity? Open
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 the experiment of R. Labouvie et al. [Phys. Rev. Lett. 115,…
View article: Report on 2102.02949v3
Report on 2102.02949v3 Open
Developing theoretical models for nonequilibrium quantum systems poses significant challenges.Here we develop and study a multimode model of a driven-dissipative Josephson junction chain of atomic Bose-Einstein condensates, as realised in …
View article: Turbulent Relaxation to Equilibrium in a Two-Dimensional Quantum Vortex Gas
Turbulent Relaxation to Equilibrium in a Two-Dimensional Quantum Vortex Gas Open
We experimentally study the emergence of microcanonical equilibrium states in the turbulent relaxation dynamics of a two-dimensional chiral vortex gas. Same-sign vortices are injected into a quasi-two-dimensional disk-shaped atomic Bose-Ei…
View article: Bistability and nonequilibrium condensation in a driven-dissipative Josephson array: a c-field model
Bistability and nonequilibrium condensation in a driven-dissipative Josephson array: a c-field model Open
Developing theoretical models for nonequilibrium quantum systems poses significant challenges. Here we develop and study a multimode model of a driven-dissipative Josephson junction chain of atomic Bose-Einstein condensates, as realised in…
View article: Bistability and nonequilibrium condensation in a driven-dissipative Josephson array: a c-field model
Bistability and nonequilibrium condensation in a driven-dissipative Josephson array: a c-field model Open
Developing theoretical models for nonequilibrium quantum systems poses significant challenges. Here we develop and study a multimode model of a driven-dissipative Josephson junction chain of atomic Bose-Einstein condensates, as realised in…
View article: Neutral Vortex Necklace in a Trapped Planar Superfluid
Neutral Vortex Necklace in a Trapped Planar Superfluid Open
View article: Turbulent relaxation to equilibrium in a two-dimensional quantum vortex gas
Turbulent relaxation to equilibrium in a two-dimensional quantum vortex gas Open
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 into a quasi-two-dimensional disk-shaped atomic Bose-Einste…
View article: Emergence of off-axis equilibria in a quantum vortex gas.
Emergence of off-axis equilibria in a quantum vortex gas. Open
We experimentally study the emergence of high-energy equilibrium states in a chiral vortex gas of like-circulation vortices realized within a disk-shaped atomic Bose-Einstein condensate. In contrast to the familiar triangular Abrikosov lat…
View article: Floquet analysis of time-averaged trapping potentials
Floquet analysis of time-averaged trapping potentials Open
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 complete understanding of when a system can be considered time-ave…
View article: Quantitative Acoustic Models for Superfluid Circuits
Quantitative Acoustic Models for Superfluid Circuits Open
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 circuit. At low oscillator currents, we demonstrate that the ci…
View article: Coherent vortex dynamics in a strongly-interacting superfluid on a silicon chip: Experimental and simulation data sets
Coherent vortex dynamics in a strongly-interacting superfluid on a silicon chip: Experimental and simulation data sets Open
This data set collates the experimental and simulation data for the research paper "Coherent vortex dynamics in a strongly-interacting superfluid on a silicon chip".
View article: Coherent vortex dynamics in a strongly-interacting superfluid on a silicon chip: Experimental and simulation data sets
Coherent vortex dynamics in a strongly-interacting superfluid on a silicon chip: Experimental and simulation data sets Open
This data set collates the experimental and simulation data for the research paper "Coherent vortex dynamics in a strongly-interacting superfluid on a silicon chip".
View article: Giant vortex clusters in a two-dimensional quantum fluid
Giant vortex clusters in a two-dimensional quantum fluid Open
Clustering vortices Many-body systems generally become more disordered as more energy is pumped into them. A curious exception to this rule was predicted in the context of turbulent flow by the physical chemist Lars Onsager. He suggested t…
View article: An atomtronic oscillator circuit for quantum gases
An atomtronic oscillator circuit for quantum gases Open
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 circuit. At low oscillator currents, we demonstrate that the ci…
View article: Giant vortex clusters in a two-dimensional quantum fluid: Data sets
Giant vortex clusters in a two-dimensional quantum fluid: Data sets Open
This data set collates the experimental and simulation data for the paper "Giant vortex clusters in a two-dimensional quantum fluid." Database S1: Data_Excel_Sheet.xlsx contains the data shown in Figs. 1, 3, and 4 of the p…
View article: Giant vortex clusters in a two-dimensional quantum fluid: Data sets
Giant vortex clusters in a two-dimensional quantum fluid: Data sets Open
This data set collates the experimental and simulation data for the paper "Giant vortex clusters in a two-dimensional quantum fluid." Database S1: Data_Excel_Sheet.xlsx contains the data shown in Figs. 1, 3, and 4 of the p…
View article: Enstrophy Cascade in Decaying Two-Dimensional Quantum Turbulence
Enstrophy Cascade in Decaying Two-Dimensional Quantum Turbulence Open
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 configurations with kinetic energy narrowly localized near a s…
View article: Quantum Analogues of Two-Dimensional Classical Turbulence
Quantum Analogues of Two-Dimensional Classical Turbulence Open
Turbulence, the irregular motion of fluids, is a challenging problem in physics. Yet some properties of turbulence appear to be universal, independent of the underlying host fluid supporting the motion. Recent studies have found that turbu…
View article: Theory of the vortex-clustering transition in a confined two-dimensional quantum fluid
Theory of the vortex-clustering transition in a confined two-dimensional quantum fluid Open
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 space. In a confined superfluid, quantized vortices can supp…
View article: Vortex Clustering Transition in a Confined 2D Quantum Fluid
Vortex Clustering Transition in a Confined 2D Quantum Fluid Open
We present a mean field theory of the clustering transition in a neutral system of vortices confined to a disc. The transition from the homogeneous phase to the clustered phase spontaneously breaks the underlying rotational SO(2) symmetry,…
View article: Identifying a Superfluid Reynolds Number via Dynamical Similarity
Identifying a Superfluid Reynolds Number via Dynamical Similarity Open
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 systems is challenging due to their fundamentally inviscid n…
View article: Spectral energy transport in two-dimensional quantum vortex dynamics
Spectral energy transport in two-dimensional quantum vortex dynamics Open
We explore the possible regimes of decaying two-dimensional quantum\nturbulence, and elucidate the nature of spectral energy transport by\nintroducing a dissipative point-vortex model with phenomenological vortex-sound\ninteractions. The m…