Bubble-nucleation rates for cosmological phase transitions
نویسندگان
چکیده
منابع مشابه
Bubble-Nucleation Rates for Cosmological Phase Transitions
We estimate bubble-nucleation rates for cosmological phase transitions. We concentrate on the evaluation of the pre-exponential factor, for which we give approximate analytical expressions. Our approach relies on the use of a real coarse-grained potential. The consistency of the calculation implies that the coarse-graining scale must be larger than the typical scale of the critical bubble. We s...
متن کاملBubble-Nucleation Rates for Radiatively Induced First-Order Phase Transitions
We present a consistent calculation of bubble-nucleation rates in theories of two scalar fields. Our approach is based on the notion of a coarse-grained free energy that incorporates the effects of fluctuations with momenta above a given scale k. We establish the reliability of the method for a variety of two-scalar models and confirm the conclusions of previous studies in one-field theories: L...
متن کاملBubble Free Energy in Cosmological Phase Transitions
Free energy as a function of temperature and the bubble radius is determined for spherical bubbles created in cosmological first order phase transitions. The phase transition is assumed to be driven by an order parameter (e.g. a Higgs field) with quartic potential. The definition of the bubble radius and the corresponding generalized, curvature-dependent surface tensions are discussed. In the f...
متن کاملEffective action for bubble nucleation rates
We develop a method to calculate the prefactor in the expression for the bubble nucleation rate. A fermion with Yukawa coupling is considered where a step potential can be used as a good approximation in the thin wall limit. Corrections due to thicker walls are considered by perturbing about the thin wall case. We derive the thermal one loop effective action, calculating it numerically and find...
متن کاملA Consistent Calculation of Bubble-Nucleation Rates
We present a consistent picture of tunnelling in field theory. Our results apply both to high-temperature field theories in four dimensions and to zero-temperature threedimensional ones. Our approach is based on the notion of a coarse-grained potential Uk that incorporates the effect of fluctuations with characteristic momenta above a given scale k. Uk is non-convex and becomes equal to the con...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of High Energy Physics
سال: 1999
ISSN: 1029-8479
DOI: 10.1088/1126-6708/1999/11/023