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Zoology and wildlife conservation

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Abstracts » Zoology and wildlife conservation

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.

Author: Y. Liu, Ketterle, W., J.K. Chin, Miller, D.E., Stan, C., Setiawan, W., Sanner, C., K. Xu
Publisher: Macmillan Publishing Ltd.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2006
Analysis, Lattice dynamics, Fermions, Chemical properties

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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.

Author: Nelson, David R.
Publisher: Macmillan Publishing Ltd.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2004
Double helix

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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.

Author: Zwierlein, M.W., Abo-Shaeer, J.R., Schirotzek, A., Schunck, C.H., Ketterle, W.
Publisher: Macmillan Publishing Ltd.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2005
Fermi liquid

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Subjects list: Superfluidity, Research, United States, Vortex-motion, Vortex motion
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