QCD at finite isospin chemical potential

Brandt BB, Endrödi G, Schmalzbauer S (2018)
EPJ Web of Conferences 175: 07020.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Autor*in
Brandt, Bastian B.; Endrödi, GergelyUniBi; Schmalzbauer, Sebastian
Abstract / Bemerkung
We investigate the properties of QCD at finite isospin chemical potential at zero and non-zero temperatures. This theory is not affected by the sign problem and can be simulated using Monte-Carlo techniques. With increasing isospin chemical potential and temperatures below the deconfinement transition the system changes into a phase where charged pions condense, accompanied by an accumulation of low modes of the Dirac operator. The simulations are enabled by the introduction of a pionic source into the action, acting as an infrared regulator for the theory, and physical results are obtained by removing the regulator via an extrapolation. We present an update of our study concerning the associated phase diagram using 2+1 flavours of staggered fermions with physical quark masses and the comparison to Taylor expansion. We also present first results for our determination of the equation of state at finite isospin chemical potential and give an example for a cosmological application. The results can also be used to gain information about QCD at small baryon chemical potentials using reweighting with respect to the pionic source parameter and the chemical potential and we present first steps in this direction.
Erscheinungsjahr
2018
Zeitschriftentitel
EPJ Web of Conferences
Band
175
Art.-Nr.
07020
eISSN
2100-014X
Page URI
https://pub.uni-bielefeld.de/record/2955731

Zitieren

Brandt BB, Endrödi G, Schmalzbauer S. QCD at finite isospin chemical potential. EPJ Web of Conferences. 2018;175: 07020.
Brandt, B. B., Endrödi, G., & Schmalzbauer, S. (2018). QCD at finite isospin chemical potential. EPJ Web of Conferences, 175, 07020. https://doi.org/10.1051/epjconf/201817507020
Brandt, B. B., Endrödi, G., and Schmalzbauer, S. (2018). QCD at finite isospin chemical potential. EPJ Web of Conferences 175:07020.
Brandt, B.B., Endrödi, G., & Schmalzbauer, S., 2018. QCD at finite isospin chemical potential. EPJ Web of Conferences, 175: 07020.
B.B. Brandt, G. Endrödi, and S. Schmalzbauer, “QCD at finite isospin chemical potential”, EPJ Web of Conferences, vol. 175, 2018, : 07020.
Brandt, B.B., Endrödi, G., Schmalzbauer, S.: QCD at finite isospin chemical potential. EPJ Web of Conferences. 175, : 07020 (2018).
Brandt, Bastian B., Endrödi, Gergely, and Schmalzbauer, Sebastian. “QCD at finite isospin chemical potential”. EPJ Web of Conferences 175 (2018): 07020.

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