Permutation cycles of hardcore Bose-Hubbard models on square and kagome lattices

Shpani, L.; Lingua, F.; Wang, Wei; Capogrosso-Sansone, B.

doi:10.1103/PhysRevB.101.195103

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Permutation cycles of hardcore Bose-Hubbard models on square and kagome lattices

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Wang, Wei
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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Shpani, L., Lingua, F., Wang, W., & Capogrosso-Sansone, B. (2020). Permutation cycles of hardcore Bose-Hubbard models on square and kagome lattices. Physical Review B, 101(19): 195103. doi:10.1103/PhysRevB.101.195103.

Cite as: https://hdl.handle.net/21.11116/0000-0009-AC9F-3

Abstract

In this paper, we study the statistics of permutation cycles of ground-state hardcore lattice bosons described by various two-dimensional Bose-Hubbard-type models on both square and kagome lattices. We find that it is possible to differentiate quantum phases by the statistics of permutations cycles. Indeed, features in the permutation cycles statistics can be used to uniquely identify certain insulating phases and are consistent with local resonances of occupation numbers in the ground-state expansion of the phase. We also confirm that suitable quantities derived from the probability distribution of the length of permutation cycles can be used to detect superfluid to insulator phase transitions.