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  Field-assisted doublon manipulation in the Hubbard model: A quantum doublon ratchet

Balzer, K., & Eckstein, M. (2014). Field-assisted doublon manipulation in the Hubbard model: A quantum doublon ratchet. EPL, 107(5): 57012. doi:10.1209/0295-5075/107/57012.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0028-1691-4 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002B-0BD6-3
Genre: Journal Article

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1403.2495v1.pdf (Preprint), 2MB
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2014
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© K. Balzer and M. Eckstein

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http://dx.doi.org/10.1209/0295-5075/107/57012 (Publisher version)
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http://arxiv.org/abs/1403.2495 (Preprint)
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 Creators:
Balzer, Karsten1, 2, Author              
Eckstein, Martin1, 2, Author              
Affiliations:
1Theory of Correlated Systems out of Equilibrium, Research Groups, Max Planck Research Department for Structural Dynamics, Department of Physics, University of Hamburg, External Organizations, ou_2173641              
2CFEL, Building 99 Luruper Chaussee 149, 22761 Hamburg, Germany , ou_persistent22              

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Free keywords: Atomic and molecular physics; Condensed matter: electrical, magnetic and optical; PACS numbers: 37.10.Jk Atoms in optical lattices; 71.70.-d Level splitting and interactions; 71.10.Fd Lattice fermion models (Hubbard model, etc.)
 Abstract: For the fermionic Hubbard model at strong coupling, we demonstrate that directional transport of localized doublons (repulsively bound pairs of two particles occupying the same site of the crystal lattice) can be achieved by applying an unbiased ac field of time-asymmetric (sawtooth-like) shape. The mechanism involves a transition to intermediate states of virtually zero double occupation which are reached by splitting the doublon by fields of the order of the Hubbard interaction. The process is discussed on the basis of numerically exact calculations for small clusters, and we apply it to more complex states to manipulate the charge order pattern of one-dimensional systems.

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Language(s): eng - English
 Dates: 2014-03-102014-08-222014-09-08
 Publication Status: Published online
 Pages: 6
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1209/0295-5075/107/57012
arXiv: 1403.2495
 Degree: -

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Title: EPL
  Other : Europhysics Letters
Source Genre: Journal
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Publ. Info: Bristol : IoPP
Pages: - Volume / Issue: 107 (5) Sequence Number: 57012 Start / End Page: - Identifier: Other: 0295-5075
CoNE: /journals/resource/0295-5075