Magnetically induced vacuum decay

Anisotropic vacuum-induced interference in decay channels

We demonstrate how the anisotropy of the vacuum of the electromagnetic field can lead to quantum interferences among the decay channels of close lying states. Our key result is that interferences are given by the scalar formed from the antinormally ordered electric field correlation tensor for the anisotropic vacuum and the dipole matrix elements for the two transitions. We present results for ...

False Vacuum Decay Induced by Particle Collisions

The semiclassical formalism for numerical calculation of the rate of tunneling transitions induced by N particles with total energy E of order or higher than the height of the barrier is developed. The formalism is applied to the induced false vacuum decay in the massive four-dimensional −λφ model. The decay rate, as a function of E and N , is calculated numerically in the range 0.4 ∼< E/Esph ∼...

Spontaneous and induced false vacuum decay

Interpreting Cosmological Vacuum Decay

The cosmological vacuum decay scenario recently proposed by Wang and Meng [1] is rediscussed. From thermodynamic arguments it is found that the ǫ parameter quantifying the vacuum decay rate must be positive in the presence of particle creation. If there is no particle creation, the proper mass of Cold Dark Matter (CDM) particles is necessarily a time dependent quantity, scaling as m(t) = moa(t)...

Brane-induced decay of the Kaluza-Klein vacuum

The enhancement in the decay rate of the Kaluza-Klein vacuum due to the presence of a brane is studied, both in the test brane approximation and beyond it. Spontaneous brane materialization in the Kaluza-Klein vacuum is also described.