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- Title
Dynamical Symmetry and the Thermofield State at Large N.
- Authors
Jevicki, Antal; Liu, Xianlong; Yoon, Junggi; Zheng, Junjie
- Abstract
We discuss thermofield double QFT at real time, in the large N limit. First, we establish a (dynamical) symmetry, which we argue holds in general for the real-time portion of the Schwinger–Kelydish contour. At large N, this symmetry is seen to generate a one-parameter degeneracy of stationary collective solutions. The construction is explicitly worked out on an example of the O (N) vector QFT. As a nontrivial application, we describe the construction of the corresponding (large N) thermofield double state in real-time collective formalism.
- Subjects
CONDENSED matter physics; QUANTUM gravity; QUANTIZATION (Physics); QUANTUM perturbations; DEGREES of freedom; HAMILTONIAN systems
- Publication
Universe (2218-1997), 2022, Vol 8, Issue 2, pN.PAG
- ISSN
2218-1997
- Publication type
Article
- DOI
10.3390/universe8020114