Molecular Hubbard Hamiltonian: field regimes and molecular species

The molecular Hubbard Hamiltonian (MHH) naturally arises for ultracold ground-state polar alkali-metal dimer molecules in optical lattices. We show that, unlike ultracold atoms, different molecules display different many-body phases due to intrinsic variances in molecular structure even when the mol...

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Hauptverfasser: Wall, Michael L. (VerfasserIn) , Bekaroglu, Erman (VerfasserIn) , Carr, Lincoln D. (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 12 August 2013
In: Physical review. A, Atomic, molecular, and optical physics
Year: 2013, Jahrgang: 88, Heft: 2, Pages: 1-6
ISSN:1094-1622
DOI:10.1103/PhysRevA.88.023605
Online-Zugang:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevA.88.023605
Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevA.88.023605
Volltext
Verfasserangaben:M.L. Wall, Erman Bekaroglu, Lincoln D. Carr

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520 |a The molecular Hubbard Hamiltonian (MHH) naturally arises for ultracold ground-state polar alkali-metal dimer molecules in optical lattices. We show that, unlike ultracold atoms, different molecules display different many-body phases due to intrinsic variances in molecular structure even when the molecular symmetry is the same. We also demonstrate a wide variety of experimental controls on 1Σ molecules via external fields, including applied static electric and magnetic fields, an ac microwave field, and the polarization and strength of optical lattice beams. We provide explicit numerical calculations of the parameters of the MHH, including tunneling and direct and exchange dipole-dipole interaction energies, for the molecules 6Li133Cs, 23Na40K, 87Rb133Cs, 40K87Rb, and 6Li23Na in weak and strong applied electric fields. As case studies of many-body physics, we use infinite-size matrix product state methods to explore the quantum phase transitions from the superfluid phase to half-filled and third-filled crystalline phases in one dimension. 
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