14 citations · 20 across the 6 of their papers we have counts for
6 papers
Wilsonian Cosmology: de Sitter (in)Stability
Jean Alexandre, Lucien Heurtier, Silvia Pla
We develop a (Wilsonian) functional-renormalisation-group framework for scalar cosmology in which quantum fluctuations of a scalar field are coarse-grained on cosmological spacelik…
Tunnelling and the Casimir effect on a -dimensional sphere
Jean Alexandre, Drew Backhouse
Two fundamental signatures of Quantum Mechanics are tunnelling and the Casimir effect. We examine the ground state energetic properties of a scalar field confined on a -dimensio…
Piecewise linear potentials for false vacuum decay and negative modes
Wen-Yuan Ai, Jean Alexandre, Sarben Sarkar
We study bounce solutions and associated negative modes in the class of piecewise linear triangular-shaped potentials that may be viewed as approximations of smooth potentials. In…
Mapping 1+1-dimensional black hole thermodynamics to finite volume effects
Jean Alexandre, Drew Backhouse, Eleni-Alexandra Kontou +2
Both black hole thermodynamics and finite volume effects in quantum field theory violate the null energy condition. Motivated by this, we compare thermodynamic features between two…
Double-well instantons in finite volume
Wen-Yuan Ai, Jean Alexandre, Matthias Carosi +2
Assuming a toroidal space with finite volume, we derive analytically the full one-loop vacuum energy for a scalar field tunnelling between two degenerate vacua, taking into account…
False vacuum decay rates, more precisely
Wen-Yuan Ai, Jean Alexandre, Sarben Sarkar
We develop a method for accurately calculating vacuum decay rates beyond the thin-wall regime in a pure scalar field theory at the one-loop level of the effective action. It accoun…