Signature of mott-insulator transition with ultracold fermions in a one-dimensional optical lattice

Liu, Xia-Ji, Drummond, Peter D. and Hu, Hui (2005) Signature of mott-insulator transition with ultracold fermions in a one-dimensional optical lattice. Physical Review Letters, 94 13: 136406-1-136406-4. doi:10.1103/PhysRevLett.94.136406

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Author Liu, Xia-Ji
Drummond, Peter D.
Hu, Hui
Title Signature of mott-insulator transition with ultracold fermions in a one-dimensional optical lattice
Journal name Physical Review Letters   Check publisher's open access policy
ISSN 0031-9007
Publication date 2005-04-08
Sub-type Article (original research)
DOI 10.1103/PhysRevLett.94.136406
Open Access Status File (Publisher version)
Volume 94
Issue 13
Start page 136406-1
End page 136406-4
Total pages 4
Place of publication College Park, MD
Publisher American Physical Soc
Collection year 2005
Language eng
Subject C1
240203 Condensed Matter Physics - Electronic and Magnetic Properties; Superconductivity
020404 Electronic and Magnetic Properties of Condensed Matter; Superconductivity
02 Physical Sciences
0906 Electrical and Electronic Engineering
Abstract Using the exact Bethe ansatz solution of the Hubbard model and Luttinger liquid theory, we investigate the density profiles and collective modes of one-dimensional ultracold fermions confined in an optical lattice with a harmonic trapping potential. We determine a generic phase diagram in terms of a characteristic filling factor and a dimensionless coupling constant. The collective oscillations of the atomic mass density, a technique that is commonly used in experiments, provide a signature of the quantum phase transition from the metallic phase to the Mott-insulator phase. A detailed experimental implementation is proposed.
Keyword Physics, Multidisciplinary
Hubbard-model
Atoms
Gas
Q-Index Code C1

 
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Created: Mon, 13 Aug 2007, 15:08:04 EST