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Author Jimenez-Garcia, K. ♦ Compton, R. L. ♦ Lin, Y. -J. ♦ Phillips, W. D. ♦ Porto, J. V. ♦ Spielman, I. B.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY ♦ CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ APPROXIMATIONS ♦ ATOMS ♦ BOSE-EINSTEIN CONDENSATION ♦ BOSE-EINSTEIN GAS ♦ DENSITY ♦ NMR IMAGING ♦ PHASE DIAGRAMS ♦ PHASE STABILITY ♦ PHASE STUDIES ♦ RUBIDIUM 87 ♦ SUPERFLUIDITY ♦ TRAPPING ♦ TWO-DIMENSIONAL CALCULATIONS ♦ BETA DECAY RADIOISOTOPES ♦ BETA-MINUS DECAY RADIOISOTOPES ♦ CALCULATION METHODS ♦ DIAGNOSTIC TECHNIQUES ♦ DIAGRAMS ♦ INFORMATION ♦ INTERMEDIATE MASS NUCLEI ♦ ISOTOPES ♦ NUCLEI ♦ ODD-EVEN NUCLEI ♦ PHYSICAL PROPERTIES ♦ RADIOISOTOPES ♦ RUBIDIUM ISOTOPES ♦ STABILITY ♦ YEARS LIVING RADIOISOTOPES
Abstract Ultracold atoms in optical lattices realize simple condensed matter models. We create an ensemble of {approx_equal}60 harmonically trapped 2D Bose-Hubbard systems from a {sup 87}Rb Bose-Einstein condensate in an optical lattice and use a magnetic resonance imaging approach to select a few 2D systems for study, thereby eliminating ensemble averaging. Our identification of the transition from superfluid to Mott insulator, as a function of both atom density and lattice depth, is in excellent agreement with a universal state diagram [M. Rigol et al., Phys. Rev. A 79 053605 (2009)] suitable for our trapped system. In agreement with theory, our data suggest a failure of the local density approximation in the transition region.
ISSN 00319007
Educational Use Research
Learning Resource Type Article
Publisher Date 2010-09-10
Publisher Place United States
Journal Physical Review Letters
Volume Number 105
Issue Number 11


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