Zobrazeno 1 - 10
of 55
pro vyhledávání: '"Gunn, J. M. F."'
Autor:
Wilkin, N. K., Gunn, J. M. F.
Instabilities are predicted for a sufficiently long hollow photonic optical fiber, or "cavity", containing a one dimensional Bose-gas in the presence of a classical, far red-detuned, confined weak electromagnetic mode. We examine both a single beam w
Externí odkaz:
http://arxiv.org/abs/1310.6771
Publikováno v:
PRL. 101, 110401 (2008)
With the imminent advent of mesoscopic rotating BECs in the lowest Landau level (LLL) regime, we explore LLL vortex nucleation. An exact many-body analysis is presented in a weakly elliptical trap for up to 400 particles. Striking non-mean field feat
Externí odkaz:
http://arxiv.org/abs/0707.3065
Autor:
Holt, J. R., Gunn, J. M. F.
The recent progress towards production of near-ground state quantum-degenerate molecules raises the issue of how such "small" molecules behave in an optical lattice. In this Letter we show that the coupling of the molecular orientation to the local e
Externí odkaz:
http://arxiv.org/abs/0707.0985
In rapidly rotating bose systems we show that there is a region of anomalous hydrodynamics whilst the system is still condensed, which coincides with the mean field quantum Hall regime. An immediate consequence is the absence of a normal fluid in any
Externí odkaz:
http://arxiv.org/abs/cond-mat/0509746
Publikováno v:
Phys. Rev. Lett. 87, 120405 (2001)
We investigate the groundstates of weakly interacting bosons in a rotating trap as a function of the number of bosons, $N$, and the average number of vortices, $N_V$. We identify the filling fraction $\nu\equiv N/N_V$ as the parameter controlling the
Externí odkaz:
http://arxiv.org/abs/cond-mat/0107005
Autor:
Stepanenko, A. S., Gunn, J. M. F.
We calculate the partition function of a gas of particles obeying Haldane exclusion statistics, using a definition of a Hilbert space having a `fractional dimension' and constructing appropriate coherent states. The fractional dimension is expressed
Externí odkaz:
http://arxiv.org/abs/cond-mat/9910493
Autor:
Wilkin, N. K., Gunn, J. M. F.
We provide evidence for several novel phases in the dilute limit of rotating BECs. By exact calculation of wavefunctions and energies for small numbers of particles, we show that the states near integer angular momentum per particle are best consider
Externí odkaz:
http://arxiv.org/abs/cond-mat/9906282
Autor:
Stepanenko, A. S., Gunn, J. M. F.
We consider a homogeneous gas of spin-S fermionic atoms, as might occur near the center of an optical trap. In the case where all scattering lengths are negative and of the same magnitude we demonstrate the instability of the Fermi sea to the condens
Externí odkaz:
http://arxiv.org/abs/cond-mat/9901317
Autor:
Taras-Semchuk, D., Gunn, J. M. F.
Publikováno v:
Phys. Rev. B 60, 13139 (1999)
We consider a model of nonlinear superfluid flow past a periodic array of point-like scatterers in one dimension. An application of this model is the determination of the critical current of a Josephson array in a regime appropriate to a Ginzburg-Lan
Externí odkaz:
http://arxiv.org/abs/cond-mat/9812268
Autor:
Lee, H. H., Gunn, J. M. F.
For thin films of superfluid adsorbed on a disordered substrate, we derive the equation of motion for a vortex in the presence of a random potential within a mean field (Hartree) description of the condensate. The compressible nature of the condensat
Externí odkaz:
http://arxiv.org/abs/cond-mat/9802217