Evidence for superfluidity of ultracold fermions in an optical lattice
Article Abstract:
The observation of distinct interference peaks when a condensate of fermionic atom pairs is released from an optical lattice, implying long-range order, is reported. The coherence was lost in a reversible manner for larger lattice depths due to a transition from superfluid to insulator, indicating that such strongly interacting fermions in an optical lattice can be used to study a new class of hamiltonians with interband and atom-molecule couplings.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2006
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Vortices weave a tangled web
Article Abstract:
An experiment was conducted for determining the ease with which quantized vortex lines that were twisted up into a deoxyribonucleic acid (DNA)-like double helix in high temperature semiconductors, can cut through each other. The magnetic force microscope (MFM) was used for probing the vortex crossing energy.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2004
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Vortices and superfluidity in a strongly interacting fermi gas
Article Abstract:
A report on the observations of vortex lattices in a strongly interacting, rotating fermi gas that provides definitive evidence for superfluidity is presented. The crossover from a Bose-Einstein condensate of molecules to a Bardeen-Cooper-Schrieffer superfluid of loosely bound pairs is explored.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2005
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