Hamiltonian simulation of the Schwinger model at finite temperature

Autor(en)

Boye Buyens, Frank Verstraete, Karel Van Acoleyen

Abstrakt

Using matrix product operators, the Schwinger model is simulated in thermal equilibrium. The variational manifold of gauge-invariant matrix product operators is constructed to represent Gibbs states. As a first application, the chiral condensate in thermal equilibrium is computed, and agreement with earlier studies is found. Furthermore, as a new application, the Schwinger model is probed with a fractional charged static quark-antiquark pair separated infinitely far from each other. A critical temperature beyond which the string tension is exponentially suppressed is found and is in qualitative agreement with analytical studies in the strong coupling limit. Finally, the CT symmetry breaking is investigated, and our results strongly suggest that the symmetry is restored at any nonzero temperature.

Organisation(en)

Quantenoptik, Quantennanophysik und Quanteninformation

Externe Organisation(en)

Ghent University

Journal

Physical Review D

Band

94

Anzahl der Seiten

33

ISSN

1550-7998

DOI

https://doi.org/10.1103/PhysRevD.94.085018

Publikationsdatum

10-2016

Peer-reviewed

Ja

ÖFOS 2012

103012 Hochenergiephysik

Schlagwörter

ASJC Scopus Sachgebiete

Nuclear and High Energy Physics

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/f06fe9ac-f22d-4b64-b504-2a50c7eba441