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Spinful bosons in a...
Spinful bosons in an optical lattice
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- Bergkvist, Sara (författare)
- KTH,Teoretisk fysik
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- McCulloch, Ian (författare)
- KTH
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- Rosengren, Anders (författare)
- KTH,Teoretisk fysik
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(creator_code:org_t)
- 2006
- 2006
- Engelska.
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Ingår i: Physical Review A. Atomic, Molecular, and Optical Physics. - 1050-2947 .- 1094-1622. ; 74:5, s. 053419-1-053419-8
- Relaterad länk:
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https://urn.kb.se/re...
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visa fler...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- We analyze the behavior of cold spin-1 particles with antiferromagnetic interactions in a one-dimensional optical lattice using density matrix renormalization group calculations. Correlation functions and the dimerization are shown and we also present results for the energy gap between ground state and the spin excited states. We confirm the anticipated phase diagram, with Mott-insulating regions of alternating dimerized S=1 chains for odd particle density versus on-site singlets for even density. We find no evidence for any additional ordered phases in the physically accessible region, however for sufficiently large spin interaction, on-site singlet pairs dominate leading, for odd density, to a breakdown of the Mott insulator or, for even density, a real-space singlet superfluid.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Nyckelord
- QUANTUM RENORMALIZATION-GROUPS; DIMERIZATION; TRANSITION; SUPERFLUID; INSULATOR; SPECTRUM; CHAINS; STATES; ATOMS; ORDER
- Condensed matter physics
- Kondenserade materiens fysik
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