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  Nonthermal Melting of Néel Order in the Hubbard Model

Balzer, K., Wolf, F. A., McCulloch, I. P., Werner, P., & Eckstein, M. (2015). Nonthermal Melting of Néel Order in the Hubbard Model. Physical Review X, 5(3): 031039. doi:10.1103/PhysRevX.5.031039.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0028-901E-1 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002A-606A-7
Genre: Journal Article

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PhysRevX.5.031039.pdf (Publisher version), 2MB
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This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the authors and the published article’s title, journal citation, and DOI.

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http://dx.doi.org/10.1103/PhysRevX.5.031039 (Publisher version)
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http://arxiv.org/abs/1504.02461 (Preprint)
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 Creators:
Balzer, Karsten1, 2, Author              
Wolf, F. Alexander3, Author
McCulloch, Ian P.4, Author
Werner, Philipp5, Author
Eckstein, Martin1, 2, Author              
Affiliations:
1CFEL, 22761 Hamburg, Germany, ou_persistent22              
2Theory of Correlated Systems out of Equilibrium, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_1938296              
3Department of Physics, Arnold Sommerfeld Center for Theoretical Physics, LMU Munich, Theresienstrasse 37, 80333 München, Germany, ou_persistent22              
4Centre for Engineered Quantum Systems, School of Physical Sciences, The University of Queensland, Brisbane, Queensland 4072, Australia, ou_persistent22              
5Department of Physics, University of Fribourg, 1700 Fribourg, Switzerland, ou_persistent22              

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Free keywords: Condensed Matter Physics; Magnetism; Strongly Correlated Materials
 Abstract: We study the unitary time evolution of antiferromagnetic order in the Hubbard model after a quench starting from the perfect Néel state. In this setup, which is well suited for experiments with cold atoms, one can distinguish fundamentally different pathways for melting of long-range order at weak and strong interaction. In the Mott insulating regime, melting of long-range order occurs due to the ultrafast transfer of energy from charge excitations to the spin background, while local magnetic moments and their exchange coupling persist during the process. The latter can be demonstrated by a local spin-precession experiment. At weak interaction, local moments decay along with the long-range order. The dynamics is governed by residual quasiparticles, which are reflected in oscillations of the off-diagonal components of the momentum distribution. Such oscillations provide an alternative route to study the prethermalization phenomenon and its influence on the dynamics away from the integrable (noninteracting) limit. The Hubbard model is solved within nonequilibrium dynamical mean-field theory, using the density-matrix renormalization group as an impurity solver.

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Language(s): eng - English
 Dates: 2015-04-132015-09-18
 Publication Status: Published online
 Pages: 12
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1103/PhysRevX.5.031039
arXiv: 1504.02461
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Title: Physical Review X
  Abbreviation : Phys. Rev. X
Source Genre: Journal
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Publ. Info: American Physical Society
Pages: - Volume / Issue: 5 (3) Sequence Number: 031039 Start / End Page: - Identifier: Other: 2160-3308
CoNE: /journals/resource/2160-3308