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Ising antiferromagnet with ultracold bosonic mixtures confined in a harmonic trap

M. Guglielmino, V. Penna, and B. Capogrosso-Sansone
Phys. Rev. A 84, 031603(R) – Published 20 September 2011

Abstract

We present accurate results based on quantum Monte Carlo simulations of two-component bosonic systems on a square lattice and in the presence of an external harmonic confinement. Starting from hopping parameters and interaction strengths which stabilize the Ising antiferromagnetic phase in the homogeneous case and at half-integer filling factor, we study how the presence of the harmonic confinement challenges the realization of such a phase. We consider realistic trapping frequencies and number of particles, and we establish under which conditions, i.e., total number of particles and population imbalance, the antiferromagnetic phase can be observed in the trap.

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  • Received 27 May 2011

DOI:https://doi.org/10.1103/PhysRevA.84.031603

©2011 American Physical Society

Authors & Affiliations

M. Guglielmino1,2, V. Penna3, and B. Capogrosso-Sansone2

  • 1Dipartimento di Fisica, Politecnico di Torino, Corso Duca degli Abruzzi 24, I-10129 Torino, Italy
  • 2Institute for Theoretical Atomic, Molecular and Optical Physics, Harvard-Smithsonian Center of Astrophysics, Cambridge, Massachusetts 02138, USA
  • 3Dipartimento di Fisica and CNISM Unità di Ricerca, Politecnico di Torino, Corso Duca degli Abruzzi 24, I-10129 Torino, Italy

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Issue

Vol. 84, Iss. 3 — September 2011

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