https://doi.org/10.1140/epja/s10050-021-00604-7
Regular Article - Theoretical Physics
Static magnetic susceptibility in finite-density 
lattice gauge theory
1
Department of Mathematical Sciences, University of Liverpool, L69 7ZL, Liverpool, UK
2
Institut für Theoretische Physik, Justus-Liebig-Universität, 35392, Giessen, Germany
3
Facility for Antiproton and Ion Research in Europe GmbH (FAIR GmbH), 64291, Darmstadt, Germany
4
Helmholtz Research Academy Hesse for FAIR (HFHF), Campus Giessen, 35392, Giessen, Germany
a
pavel.buividovich@liverpool.ac.uk
Received:
11
April
2021
Accepted:
1
October
2021
Published online:
19
October
2021
We study static magnetic susceptibility 
in SU(2) lattice gauge theory with 
light flavours of dynamical fermions at finite chemical potential 
. Using linear response theory we find that SU(2) gauge theory exhibits paramagnetic behavior in both the high-temperature deconfined regime and the low-temperature confining regime. Paramagnetic response becomes stronger at higher temperatures and larger values of the chemical potential. For our range of temperatures 
, the first coefficient of the expansion of 
in even powers of 
around 
is close to that of free quarks and lies in the range 
. The strongest paramagnetic response is found in the diquark condensation phase at 
.
© The Author(s) 2021
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