Scaling of noise correlations in one-dimensional-lattice-hard-core-boson systems

Details Scaling of noise correlations in one-dimensional-lattice-hard-core-boson systems Scaling of noise correlations in one-dimensional-lattice-hard-core-boson systems

2010-11-18

arxiv.org/abs/1011.4259v2

Phys. Rev. A 83, 023611 (2011)

Physics

Condensed Matter

Quantum Gases

9 pages, 12 figures

Scientific paper

10.1103/PhysRevA.83.023611

Noise correlations are studied for systems of hard-core bosons in one-dimensional lattices. We use an exact numerical approach based on the Bose-Fermi mapping and properties of Slater determinants. We focus on the scaling of the noise correlations with system size in superfluid and insulating phases, which are generated in the homogeneous lattice, with period-two superlattices and with uniformly distributed random diagonal disorder. For the superfluid phases, the leading contribution is shown to exhibit a density-independent scaling proportional to the system size, while the first subleading term exhibits a density-dependent power-law exponent.

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