Fermionization in an expanding 1D gas of hard-core bosons

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dc.creatorRigol, Marcos
dc.creatorMuramatsu, Alejandro
dc.date2004-10-27
dc.date2005-07-05
dc.date.accessioned2026-07-07T03:01:43Z
dc.date.available2026-07-07T03:01:43Z
dc.descriptionWe show by means of an exact numerical approach that the momentum distribution of a free expanding gas of hard-core bosons on a one-dimensional lattice approaches to the one of noninteracting fermions, acquiring a Fermi edge. Yet there is a power-law decay of the one-particle density matrix $ρ_x\sim 1/\sqrt{x}$, as usual for hard-core bosons in the ground state, which accounts for a large occupation of the lowest natural orbitals for all expansion times. The fermionization of the momentum distribution function, which is not observed in equilibrium, is analyzed in detail.
dc.descriptionRevtex file, 4 pages, 6 figures, published version
dc.identifierhttps://arxiv.org/abs/cond-mat/0410683
dc.identifierhttp://arxiv.org/abs/cond-mat/0410683
dc.identifierPhys. Rev. Lett. 94, 240403 (2005)
dc.identifierdoi:10.1103/PhysRevLett.94.240403
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/25147
dc.subjectStatistical Mechanics
dc.subjectOther Condensed Matter
dc.titleFermionization in an expanding 1D gas of hard-core bosons
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