Results 1 to 10 of about 647 (104)
Finding the Elusive Sliding Phase in the Superfluid-Normal Phase Transition Smeared by c-Axis Disorder [PDF]
, 2010 We consider a stack of weakly Josephson coupled superfluid layers with c-axis disorder in the form of random superfluid stiffnesses and vortex fugacities in each layer as well as random interlayer coupling strengths.
Demler, Eugene +2 more
core +1 more source
Coherent ratchets in driven Bose-Einstein condensates [PDF]
, 2009 We study the response of a Bose-Einstein condensate to an unbiased periodic driving potential. By controlling the space and time symmetries of the driving we show how a directed current can be induced, producing a coherent quantum ratchet.
Creffield, C. E., Sols, F.
core +3 more sources
New Journal of Physics, 2015 We present a thorough analysis of soliton solutions to the quasi-one-dimensional (quasi-1D) nonlinear Dirac equation (NLDE) for a Bose–Einstein condensate in a honeycomb lattice with armchair geometry.
L H Haddad, C M Weaver, Lincoln D Carr
doaj +1 more source
New Journal of Physics, 2015 The nonlinear Dirac equation for Bose–Einstein condensates (BECs) in honeycomb optical lattices gives rise to relativistic multi-component bright and dark soliton solutions.
L H Haddad, Lincoln D Carr
doaj +1 more source
New Journal of Physics, 2015 We analyze the vortex solution space of the $(2+1)$ -dimensional nonlinear Dirac equation for bosons in a honeycomb optical lattice at length scales much larger than the lattice spacing. Dirac point relativistic covariance combined with s-wave scattering
L H Haddad, Lincoln D Carr
doaj +1 more source
New Journal of Physics, 2015 We present the theoretical and mathematical foundations of stability analysis for a Bose–Einstein condensate (BEC) at Dirac points of a honeycomb optical lattice. The combination of s -wave scattering for bosons and lattice interaction places constraints
L H Haddad, Lincoln D Carr
doaj +1 more source
Anisotropic 2D diffusive expansion of ultra-cold atoms in a disordered potential [PDF]
, 2010 We study the horizontal expansion of vertically confined ultra-cold atoms in the presence of disorder. Vertical confinement allows us to realize a situation with a few coupled harmonic oscillator quantum states.
Allard, B. +8 more
core +7 more sources
Equation of state for a trapped quantum gas: remnant of zero-point energy effects
New Journal of Physics, 2016 The study of the thermodynamic properties of trapped gases has attracted great attention during the last few years and can be used as a tool to characterize such clouds in the presence of other phenomena.
P C M Castilho +7 more
doaj +1 more source
Superfluid Bloch dynamics in an incommensurate optical lattice
New Journal of Physics, 2014 We investigate the interplay of disorder and interactions in the accelerated transport of a Bose–Einstein condensate through an incommensurate optical lattice.
J B Reeves +4 more
doaj +1 more source
An ytterbium quantum gas microscope with narrow-line laser cooling
New Journal of Physics, 2016 We demonstrate site-resolved imaging of individual bosonic ${}^{174}\mathrm{Yb}$ atoms in a Hubbard-regime two-dimensional optical lattice with a short lattice constant of 266 nm.
Ryuta Yamamoto +4 more
doaj +1 more source