Single-particle versus pair condensation of hard-core bosons with correlated hopping

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dc.creatorSchmidt, K. P.
dc.creatorDorier, J.
dc.creatorLaeuchli, A.
dc.creatorMila, F.
dc.date2006-07-24
dc.date2006-11-20
dc.date.accessioned2026-07-07T07:16:09Z
dc.date.available2026-07-07T07:16:09Z
dc.descriptionWe investigate the consequences of correlated hopping on the ground state properties of hard-core bosons on a square lattice as revealed by extensive exact diagonalizations and quantum Monte Carlo simulations. While for non interacting hard-core bosons the effective attraction induced by the correlated hopping leads to phase separation at low density, we show that a modest nearest-neighbor repulsion suppresses phase separation, leading to a remarkable low-density pairing phase with no single particle Bose-Einstein condensation but long-range two-particle correlations, signaling a condensation of pairs. We also explain why the unusual properties of the pairing phase are a real challenge for standard one-worm quantum Monte Carlo simulations.
dc.description8 pages, 7 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0607618
dc.identifierhttp://arxiv.org/abs/cond-mat/0607618
dc.identifierPhys. Rev. B 74, 174508 (2006)
dc.identifierdoi:10.1103/PhysRevB.74.174508
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/113484
dc.subjectOther Condensed Matter
dc.titleSingle-particle versus pair condensation of hard-core bosons with correlated hopping
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