Thermal order in large N conformal gauge theories
Thermal order in large N conformal gauge theories
复制标题
大 N 共形规范理论中的热序
DOI:
10.1007/jhep04(2021)203
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发表时间:
2020
影响因子:
5.4
通讯作者:
E. Rabinovici
中科院分区:
文献类型:
--
作者:
Soumyadeep Chaudhuri;Changha Choi;E. Rabinovici
In this work we explore the possibility of spontaneous breaking of global symmetries at all nonzero temperatures for conformal field theories (CFTs) in D = 4 space-time dimensions. We show that such a symmetry-breaking indeed occurs in certain families of non-supersymmetric large N gauge theories at a planar limit. We also show that this phenomenon is accompanied by the system remaining in a persistent Brout-Englert-Higgs (BEH) phase at any temperature. These analyses are motivated by the work done in [1, 2] where symmetry-breaking was observed in all thermal states for certain CFTs in fractional dimensions. In our case, the theories demonstrating the above features have gauge groups which are specific products of SO(N) in one family and SU(N) in the other. Working in a perturbative regime at the N → ∞ limit, we show that the beta functions in these theories yield circles of fixed points in the space of couplings. We explicitly check this structure up to two loops and then present a proof of its survival under all loop corrections. We show that under certain conditions, an interval on this circle of fixed points demonstrates both the spontaneous breaking of a global symmetry as well as a persistent BEH phase at all nonzero temperatures. The broken global symmetry is ℤ2 in one family of theories and U(1) in the other. The corresponding order parameters are expectation values of the determinants of bifundamental scalar fields in these theories. We characterize these symmetries as baryon-like symmetries in the respective models.
影响因子:
5
作者:
Martelli D
通讯作者:
Martelli D
影响因子:
5.4
作者:
Martelli D
通讯作者:
Martelli D
影响因子:
5
作者:
Jepsen, Christian B.;Klebanov, Igor R.;Popov, Fedor K.
通讯作者:
Popov, Fedor K.