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Complex instantons in sigma models with chemical potential

Bruckmann, Falk and Lochner, Stephan (2018) Complex instantons in sigma models with chemical potential. Physical Review D 98 (6), 065005-1-065005-15.

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Date of publication of this fulltext: 14 Feb 2019 11:22

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Other URL: http://doi.org/10.1103/PhysRevD.98.065005


We analyze two-dimensional nonlinear sigma models at nonzero chemical potentials, which are governed by a complex action. In the spirit of contour deformations (thimbles), we extend the fields into the complex plane, which allows us to incorporate the chemical potentials μ as twisted boundary conditions. We write down the equations of motion and find exact BPS-like solutions in terms of pairs of ...


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Item type:Article
Date:10 September 2018
Institutions:Physics > Institute of Theroretical Physics > Chair Professor Schäfer > Group Andreas Schäfer
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Dewey Decimal Classification:500 Science > 530 Physics
Refereed:Yes, this version has been refereed
Created at the University of Regensburg:Yes
Item ID:38348
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