89 citations · 504 across the 16 of their papers we have counts for
16 papers
Linear Response of a Periodically Driven Thermal Dipolar Gas
Reuben R. W. Wang, Andrew G. Sykes, John L. Bohn
We study the nonequilibrium dynamics of an ultracold, non-degenerate dipolar gas of Dy atoms in a cylindrically symmetric harmonic trap. To do so, we investigate the normal…
Hyperspherical-LOCV Approximation to Resonant BEC
M. W. C. Sze, A. G. Sykes, D. Blume +1
We study the ground state properties of a system of harmonically trapped bosons of mass interacting with two-body contact interactions, from small to large scattering lengt…
Two- and three-body problem with Floquet-driven zero-range interactions
A. G. Sykes, H. Landa, D. S. Petrov
We study the two-body scattering problem in the zero-range approximation with a sinusoidally driven scattering length and calculate the relation between the mean value and amplitud…
Anisotropic collisions of dipolar Bose-Einstein condensates in the universal regime
Nathaniel Q. Burdick, Andrew G. Sykes, Yijun Tang +1
We report the measurement of collisions between two Bose-Einstein condensates with strong dipolar interactions. The collision velocity is significantly larger than the internal vel…
Anisotropic expansion of a thermal dipolar Bose gas
Yijun Tang, Andrew G. Sykes, Nathaniel Q. Burdick +3
We report on the anisotropic expansion of ultracold bosonic dysprosium gases at temperatures above quantum degeneracy and develop a quantitative theory to describe this behavior. T…
s-wave scattering lengths of the strongly dipolar bosons Dy and Dy
Yijun Tang, Andrew Sykes, Nathaniel Q. Burdick +2
We report the measurement of the triplet s-partial-wave scattering length of two bosonic isotopes of the highly magnetic element, dysprosium: for Dy and…
Nonequilibrium dynamics of an ultracold dipolar gas
Andrew Sykes, John Bohn
We study the relaxation and damping dynamics of an ultracold, but not quantum degenerate, gas consisting of dipolar particles. These simulations are performed using a direct simula…
Quenching to unitarity: Quantum dynamics in a 3D Bose gas
A. G. Sykes, J. P. Corson, J. P. D'Incao +5
We study the dynamics of a dilute Bose gas at zero temperature following a sudden quench of the scattering length from a noninteracting Bose condensate to unitarity (infinite scatt…
Coherence and correlation functions of quasi-2D dipolar superfluids at zero temperature
Andrew G. Sykes, Christopher Ticknor
We use the Bogoliubov theory of Bose-Einstein condensation to study the properties of dipolar particles (atoms or molecules) confined in a uniform two-dimensional geometry at zero…
Bloch-Redfield theory of high-temperature magnetic fluctuations in interacting spin systems
Andrew Sykes, Dmitry Solenov, Dmitry Mozyrsky
We study magnetic fluctuations in a system of interacting spins on a lattice at high temperatures and in the presence of a spatially varying magnetic field. Starting from a microsc…
Probing the quantum state of a 1D Bose gas using off-resonant light scattering
A. G. Sykes, R. J. Ballagh
We present a theoretical treatment of coherent light scattering from an interacting 1D Bose gas at finite temperatures. We show how this can provide a nondestructive measurement of…
Exact solutions to the four Goldstone modes around a dark soliton of the nonlinear Schroedinger equation
Andrew Sykes
This article is concerned with the linearisation around a dark soliton solution of the nonlinear Schrödinger equation. Crucially, we present analytic expressions for the four linea…
Drag force on an impurity below the superfluid critical velocity in a quasi-one-dimensional Bose-Einstein condensate
Andrew G. Sykes, Matthew J. Davis, David C. Roberts
The existence of frictionless flow below a critical velocity for obstacles moving in a superfluid is well established in the context of the mean-field Gross-Pitaevskii theory. We c…
Non-local pair correlations in the 1D Bose gas at finite temperature
P. Deuar, A. G. Sykes, D. M. Gangardt +3
The behavior of the spatial two-particle correlation function is surveyed in detail for a uniform 1D Bose gas with repulsive contact interactions at finite temperatures. Both long-…
Spatial nonlocal pair correlations in a repulsive 1D Bose gas
A. G. Sykes, D. M. Gangardt, M. J. Davis +3
We analytically calculate the spatial nonlocal pair correlation function for an interacting uniform 1D Bose gas at finite temperature and propose an experimental method to measure…
Excitation spectrum of bosons in a finite one-dimensional circular waveguide via the Bethe ansatz
Andrew G. Sykes, Peter D. Drummond, Matthew J. Davis
The exactly solvable Lieb-Liniger model of interacting bosons in one-dimension has attracted renewed interest as current experiments with ultra-cold atoms begin to probe this regim…