19 citations · 100 across the 10 of their papers we have counts for
10 papers
Morphological false-vacuum decay in dipolar supersolids
Wyatt Kirkby, Lauriane Chomaz, Thomas Gasenzer
False-vacuum decay between two morphologically distinct supersolid phases via bubble nucleation is studied in a uniform dipolar gas confined to the plane. Starting from a metastabl…
Spin rotons and supersolids in binary antidipolar condensates
W. Kirkby, T. Bland, F. Ferlaino +1
We present a theoretical study of a mixture of antidipolar and nondipolar Bose-Einstein condensates confined to an infinite tube. We predict the presence of a spin roton and its as…
Scaling at the OTOC Wavefront: free versus chaotic models
Jonathon Riddell, Wyatt Kirkby, D. H. J. O'Dell +1
Out of time ordered correlators (OTOCs) are useful tools for investigating foundational questions such as thermalization in closed quantum systems because they can potentially dist…
False signals of chaos from quantum probes
W. Kirkby, D. H. J. O'Dell, J. Mumford
We demonstrate that two-time correlation functions, which are generalizations of out-of-time-ordered correlators (OTOCs), can show 'false-flags' of chaos by exhibiting behaviour pr…
Caustics in quantum many-body dynamics
W. Kirkby, Y. Yee, K. Shi +1
We describe a new class of nonequilibrium quantum many-body phenomena in the form of networks of caustics that dominate the many-body wavefunction in the semiclassical regime follo…
Measuring out-of-time-ordered correlation functions with a single impurity qubit in a bosonic Josephson junction
J. Mumford, W. Kirkby, D. H. J. O'Dell
We calculate the out-of-time-ordered correlation function (OTOC) of a single impurity qubit coupled to fully a connected many-particle system such as a bosonic Josephson junction o…
Quantum caustics and the hierarchy of light cones in quenched spin chains
W. Kirkby, J. Mumford, D. H. J. O'Dell
We show that the light cone-like structures that form in spin chains after a quench are quantum caustics. Their natural description is in terms of catastrophe theory and this impli…
Catastrophes in non-equilibrium many-particle wave functions: universality and critical scaling
J Mumford, W Kirkby, D H J O'Dell
As part of the quest to uncover universal features of quantum dynamics, we study catastrophes that form in simple many-body wave functions after a quench, focusing on two-mode syst…
Testing the nonlocal kinetic energy functional of an inhomogeneous, two-dimensional degenerate Fermi gas within the average density approximation
J. Towers, B. P. van Zyl, W. Kirkby
In a recent paper [Phys.~Rev.~A {\bf 89}, 022503 (2014)], the average density approximation (ADA) was implemented to develop a parameter-free, nonlocal kinetic energy functional to…
Density-functional theory for the crystalline phases of a two-dimensional dipolar Fermi gas
B. P. van Zyl, W. Kirkby, W. Ferguson
Density-functional theory is utilized to investigate the zero-temperature transition from a Fermi liquid to an inhomogeneous stripe, or Wigner crystal phase, predicted to occur in…