Phys. Rev. D 78, 065030 (2008) [4 pages]Thermal instability in a gravity-like scalar theoryReceived 25 June 2008; published 18 September 2008 We study the question of stability of the ground state of a scalar theory which is a generalization of the ϕ3 theory and has some similarity to gravity with a cosmological constant. We show that the ground state of the theory at zero temperature becomes unstable above a certain critical temperature, which is evaluated in closed form at high temperature. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.78.065030
DOI:
10.1103/PhysRevD.78.065030
PACS:
11.10.Wx
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