https://doi.org/10.1140/epjc/s10052-023-12082-w
Regular Article - Theoretical Physics
Spontaneous symmetry breaking in the BFSS model: analytical results using the Gaussian expansion method
1
Higgs Centre for Theoretical Physics, School of Physics and Astronomy, University of Edinburgh, EH9 3FD, Edinburgh, UK
2
Department of Physics, McGill University, H3A 2T8, Montréal, QC, Canada
a
suddhasattwa.brahma@gmail.com
Received:
17
May
2023
Accepted:
27
September
2023
Published online:
8
October
2023
We apply the Gaussian expansion method to the BFSS matrix model in the high temperature limit. When the (Euclidean) BFSS action is expanded about a Gaussian ansatz, it is shown that the SO(9) symmetry is spontaneously broken, analogous to what happens in the IKKT model. The analysis of the free energy, using the set of gap equations which determines the width of the Gaussian terms, is sufficient to show that this symmetry breaking happens only when the fermionic terms are included and is absent in the bosonic case.
© The Author(s) 2023
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