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Density fluctuations of a hard-core Bose gas in a one-dimensional lattice

C. Ates·Ch. Moseley·K. Ziegler
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Abstract

For a hard-core Bose gas on a one-dimensional lattice we find characteristic oscillations in the density-density correlation function. Their wavelength diverges as the system undergoes a continuous transition from an incommensurate to a Mott insulating phase. The associated static structure factor vanishes as the Mott insulating phase is approached. The qualitative picture is unchanged when a weak confinig potential is applied to the system.

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C. Ates, Ch. Moseley, K. Ziegler. 2004-08-16. Density fluctuations of a hard-core Bose gas in a one-dimensional lattice. https://doi.org/10.1103/physreva.71.061601

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