- School of Physics - Research Publications
School of Physics - Research Publications
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ItemInstabilities leading to vortex lattice formation in rotating Bose-Einstein condensatesParker, NG ; van Bijnen, RMW ; Martin, AM (American Physical Society, 2006-06-20)We present a comprehensive theoretical study of vortex lattice formation in atomic Bose-Einstein condensates confined by a rotating elliptical trap. We consider rotating solutions of the classical hydrodynamic equations and their response to perturbations, as well as time-dependent simulations. We discriminate three distinct, experimentally testable, regimes of instability: ripple, interbranch, and catastrophic. Under symmetry-breaking perturbations these instabilities lead to lattice formation even at zero temperature. While our results are consistent with previous theoretical and experimental results, they shed further light on lattice formation.
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ItemNo Preview AvailableBright solitary waves and trapped solutions in Bose-Einstein condensates with attractive interactionsParker, NG ; Cornish, SL ; Adams, CS ; Martin, AM (IOP PUBLISHING LTD, 2007-08-14)
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ItemNo Preview AvailableCollisions of bright solitary matter wavesParker, NG ; Martin, AM ; Cornish, SL ; Adams, CS (IOP PUBLISHING LTD, 2008-02-28)
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ItemNo Preview AvailableRotation of an atomic Bose-Einstein condensate with and without a quantized vortexCorro, I ; Parker, NG ; Martin, AM (IOP PUBLISHING LTD, 2007-09-28)
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ItemDynamical instability of a rotating dipolar Bose-Einstein condensatevan Bijnen, RMW ; O'Dell, DHJ ; Parker, NG ; Martin, AM (AMER PHYSICAL SOC, 2007-04-13)We analyze the hydrodynamic solutions for a dilute Bose-Einstein condensate with long-range dipolar interactions in a rotating, elliptical harmonic trap. The static solutions and their regimes of dynamical instability vary nontrivially with the strength of the dipolar interactions. We comprehensively map out this behavior, and, in particular, examine the experimental routes toward unstable dynamics, which, in analogy to conventional condensates, may lead to vortex lattice formation.
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ItemSpatial coherent transport of interacting dilute Bose gasesRab, M ; Cole, JH ; Parker, NG ; Greentree, AD ; Hollenberg, LCL ; Martin, AM (AMER PHYSICAL SOC, 2008-06)
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ItemBright solitary waves of atomic Bose-Einstein condensates under rotationJamaludin, NA ; Parker, NG ; Martin, AM (AMER PHYSICAL SOC, 2008-05)
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ItemSoliton-Sound Interactions in Quasi-One-Dimensional Bose-Einstein CondensatesPARKER, N ; Proukakis, NP ; Leadbeater, M ; Adams, CS ( 2003)
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ItemParametric Driving of Dark Solitons in Atomic Bose-Einstein CondensatesProukakis, NP ; PARKER, N ; Barenghi, CF ; Adams, CS ( 2004)
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ItemEmergence and decay of turbulence in stirred atomic Bose-Einstein condensates.Parker, NG ; Adams, CS (American Physical Society (APS), 2005-09-30)We show that "weak" elliptical deformation of an atomic Bose-Einstein condensate rotating at close to the quadrupole instability frequency leads to turbulence with a Kolmogorov energy spectrum. The turbulent state is produced by energy transfer to condensate fragments that are ejected by the quadrupole instability. This energy transfer is driven by breaking the twofold rotational symmetry of the condensate. Subsequently, vortex-sound interactions damp the turbulent state leading to the crystallization of a vortex lattice.