Quantized squeezing and even-odd asymmetry of trapped bosons

Phys. Rev. A 80, 063624 (2009) We investigate the exact nature of the superfluid-to-Mott-insulator crossover for interacting bosons on an optical lattice in a one-dimensional, harmonic trap by high-precision density-matrix renormalization-group calculations. The results reveal an intermediate regime...

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Bibliographic Details
Main Authors Hu, Shijie, Wen, Yuchuan, Yu, Yue, Normand, Bruce, Wang, Xiaoqun
Format Journal Article
LanguageEnglish
Published 17.09.2009
Subjects
Physics - Quantum Gases
Physics - Strongly Correlated Electrons
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Summary:Phys. Rev. A 80, 063624 (2009) We investigate the exact nature of the superfluid-to-Mott-insulator crossover for interacting bosons on an optical lattice in a one-dimensional, harmonic trap by high-precision density-matrix renormalization-group calculations. The results reveal an intermediate regime characterized by a cascade of microscopic steps. These arise as a consequence of individual boson "squeezing" events and display an even-odd alternation dependent on the trap symmetry. We discuss the experimental observation of this behavior, which is generic in an external trapping potential.
DOI:10.48550/arxiv.0909.3218