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  Strong boundary and trap potential effects on emergent physics in ultra-cold fermionic gases

Hauck, J. B., Honerkamp, C., & Kennes, D. M. (2021). Strong boundary and trap potential effects on emergent physics in ultra-cold fermionic gases. New Journal of Physics, 23(6): 063015. doi:10.1088/1367-2630/abfe1e.

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Hauck_2021_New_J._Phys._23_063015.pdf (Publisher version), 3MB
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Hauck_2021_New_J._Phys._23_063015.pdf
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Open Access. - Original content from this work may be used under the terms of theCreative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
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© The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaft

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https://dx.doi.org/10.1088/1367-2630/abfe1e (Publisher version)
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https://arxiv.org/abs/2102.08671 (Preprint)
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 Creators:
Hauck, J. B.1, Author
Honerkamp, C.2, 3, Author
Kennes, D. M.4, 5, Author              
Affiliations:
1Institut für Theorie der Statistischen Physik, RWTH Aachen and JARA - Fundamentals of Future Information Technology, ou_persistent22              
2Institute for Theoretical Solid State Physics, RWTH Aachen University, ou_persistent22              
3JARA-FIT, Jülich Aachen Research Alliance—Fundamentals of Future Information Technology, ou_persistent22              
4Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              
5Center for Free Electron Laser Science, ou_persistent22              

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Free keywords: ultra-cold gases, superconductivity, functional renormalization group, Hubbard model, finite size
 Abstract: The field of quantum simulations in ultra-cold atomic gases has been remarkably successful. In principle it allows for an exact treatment of a variety of highly relevant lattice models and their emergent phases of matter. But so far there is a lack in the theoretical literature concerning the systematic study of the effects of the trap potential as well as the finite size of the systems, as numerical studies of such non periodic, correlated fermionic lattices models are numerically demanding beyond one dimension. We use the recently introduced real-space truncated unity functional renormalization group to study these boundary and trap effects with a focus on their impact on the superconducting phase of the 2D Hubbard model. We find that in the experiments not only lower temperatures need to be reached compared to current capabilities, but also system size and trap potential shape play a crucial role to simulate emergent phases of matter.

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Language(s): eng - English
 Dates: 2021-04-202021-02-172021-05-052021-06-08
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1088/1367-2630/abfe1e
arXiv: 2102.08671
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Title: New Journal of Physics
  Abbreviation : New J. Phys.
Source Genre: Journal
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Publ. Info: Bristol : IOP Publishing
Pages: - Volume / Issue: 23 (6) Sequence Number: 063015 Start / End Page: - Identifier: ISSN: 1367-2630
CoNE: https://pure.mpg.de/cone/journals/resource/954926913666