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- Title
Perturbative ground states of the 1+1d double-well.
- Authors
Liu, Hui; Zhou, Yao; Evslin, Jarah
- Abstract
At second order in perturbation theory, we find the ground states of the ϕ 4 double-well quantum field theory in 1+1 dimensions. The operators which create these ground states from the free vacuum are constructed explicitly at this order, as is the operator which interpolates between the ground states. As a warmup we perform the analogous calculation in quantum mechanics, where the true ground state is unique but in perturbation theory there are also two ground states.
- Subjects
PERTURBATION theory; QUANTUM mechanics; DIMENSION theory (Algebra); WARMUP
- Publication
European Physical Journal C -- Particles & Fields, 2020, Vol 80, Issue 5, p1
- ISSN
1434-6044
- Publication type
Article
- DOI
10.1140/epjc/s10052-020-7934-6