Schwinger pair production with ultracold atoms

Kasper, V.; Hebenstreit, Florian; Oberthaler, M.K.; Berges, J. (2016). Schwinger pair production with ultracold atoms. Physics letters. B, 760, pp. 742-746. Elsevier 10.1016/j.physletb.2016.07.036

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We consider a system of ultracold atoms in an optical lattice as a quantum simulator for electron–positron pair production in quantum electrodynamics (QED). For a setup in one spatial dimension, we investigate the nonequilibrium phenomenon of pair production including the backreaction leading to plasma oscillations. Unlike previous investigations on quantum link models, we focus on the infinite-dimensional Hilbert space of QED and show that it may be well approximated by experiments employing Bose–Einstein condensates interacting with fermionic atoms. Numerical calculations based on functional integral techniques give a unique access to the physical parameters required to realize QED phenomena in a cold atom experiment. In particular, we use our approach to consider quantum link models in a yet unexplored parameter regime and give bounds for their ability to capture essential features of the physics. The results suggest a paradigmatic change towards realizations using coherent many-body states for quantum simulations of high-energy particle physics phenomena.

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)
08 Faculty of Science > Institute of Theoretical Physics

UniBE Contributor:

Hebenstreit, Florian

Subjects:

500 Science > 530 Physics

ISSN:

0370-2693

Publisher:

Elsevier

Language:

English

Submitter:

Esther Fiechter

Date Deposited:

30 Sep 2016 09:20

Last Modified:

30 Sep 2016 09:20

Publisher DOI:

10.1016/j.physletb.2016.07.036

ArXiv ID:

1506.01238

BORIS DOI:

10.7892/boris.88669

URI:

https://boris.unibe.ch/id/eprint/88669

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