Quantized squeezing and even-odd asymmetry of trapped bosons

Details Quantized squeezing and even-odd asymmetry of trapped bosons Quantized squeezing and even-odd asymmetry of trapped bosons

2009-09-17

arxiv.org/abs/0909.3218v1

Phys. Rev. A 80, 063624 (2009)

Physics

Condensed Matter

Quantum Gases

4.05 pages, 4 figures. Presents significantly more, and more systematic, calculations and explanations than cond-mat/0701691

Scientific paper

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.

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