Quantum and statistical fluctuations in dynamical symmetry breaking

Abstract

Dynamical symmetry breaking in an expanding nuclear system is investigated in semi-classical and quantum framework by employing a collective transport model which is constructed to mimic the collective behavior of expanding systems. It is shown that the fluctuations in collective coordinates during the expansion are developed mainly by the enhancement of the initial fluctuations by the driving force, and that statistical and quantum fluctuations have similar consequences. It is pointed out that the quantal fluctuations may play an important role in the development of instabilities by reducing the time needed to break the symmetry, and the possible role of quantal fluctuations in spinodal decomposition of nuclei is discussed.

19 Latex pages including 6 figures

Cited by in corpus (5)

• Microscopic model approaches to fragmentation of nuclei and phase transitions in nuclear matter
• Isospin fractionation : equilibrium versus spinodal decomposition
• Break-up mechanisms in heavy ion collisions at low energies
• Isospin dependent thermodynamics of fragmentation
• Damping of Collective Nuclear Motion and Thermodynamic Properties of Nuclei beyond Mean Field