Quantum Subcritical Bubbles

On acoustic cavitation of slightly subcritical bubbles

The classical Blake threshold indicates the onset of quasistatic evolution leading to cavitation for gas bubbles in liquids. When the mean pressure in the liquid is reduced to a value below the vapor pressure, the Blake analysis identifies a critical radius which separates quasistatically stable bubbles from those which would cavitate. In this work, we analyze the cavitation threshold for radia...

Do subcritical bubbles hinder first order phase transition?

We consider the role played by subcritical bubbles during the electroweak phase transition, estimate their average size, amplitude and formation rate taking into account the crucial role played by thermalization. We also study the influence of subcritical bubbles on the formation of critical bubbles in the thin wall regime and show that, contrary to some recent claims, subcritical bubbles do no...

Bubbles and Quantum Tunnelling in Inflationary Cosmology

We review a procedure to use semiclassical methods in the quantization of General Relativistic shells and apply these techniques in some simplified models of inflationary cosmology. Some interesting open issues are introduced and the relevance of their solution in the broader context of Quantum Gravity is discussed. The interplay of the gravitational and quantum realms is a fundamental topic in...

Nonperturbative production of multiboson states and quantum bubbles.

The amplitude of production of n on-mass-shell scalar bosons by a highly virtual field φ is considered in a λφ theory with weak coupling λ and spontaneously broken symmetry. The amplitude of this process is known to have an n! growth when the produced bosons are exactly at rest. Here it is shown that for n ≫ 1/λ the process goes through ‘quantum bubbles’, i.e. quantized droplets of a different ...

Bubbles In Tehran Stock Exchange