Spin-1 Atoms in Optical Superlattices: Single-Atom Tunneling and Entanglement

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Spin-1 Atoms in Optical Superlattices: Single-Atom Tunneling and Entanglement

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Title: Spin-1 Atoms in Optical Superlattices: Single-Atom Tunneling and Entanglement
Author: Wagner, Andreas; Bruder, Christoph; Demler, Eugene A.

Note: Order does not necessarily reflect citation order of authors.

Citation: Wagner, Andreas, Christoph Bruder, and Eugene Demler. 2011. Spin-1 atoms in optical superlattices: Single-atom tunneling and entanglement. Physical Review A 84(6): 063636.
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Abstract: We examine spinor Bose-Einstein condensates in optical superlattices theoretically using a Bose-Hubbard Hamiltonian that takes spin effects into account. Assuming that a small number of spin-1 bosons is loaded in an optical potential, we study single-particle tunneling that occurs when one lattice site is ramped up relative to a neighboring site. Spin-dependent effects modify the tunneling events in a qualitative and quantitative way. Depending on the asymmetry of the double well different types of magnetic order occur, making the system of spin-1 bosons in an optical superlattice a model for mesoscopic magnetism. We use a double-well potential as a unit cell for a one-dimensional superlattice. Homogeneous and inhomogeneous magnetic fields are applied and the effects of the linear and the quadratic Zeeman shifts are examined. We also investigate the bipartite entanglement between the sites and construct states of maximal entanglement. The entanglement in our system is due to both orbital and spin degrees of freedom. We calculate the contribution of orbital and spin entanglement and show that the sum of these two terms gives a lower bound for the total entanglement.
Published Version: doi:10.1103/PhysRevA.84.063636
Other Sources: http://arxiv.org/abs/1110.1968v2
Terms of Use: This article is made available under the terms and conditions applicable to Open Access Policy Articles, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#OAP
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:8148856

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  • FAS Scholarly Articles [7106]
    Peer reviewed scholarly articles from the Faculty of Arts and Sciences of Harvard University
 
 

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