Unitary evolution with fluctuations and dissipation
arXiv:1805.08908 · doi:10.1103/PhysRevC.100.014615
The paper extends the classical Langevin equation to a quantum framework within time‑dependent density functional theory, enabling unitary evolution of many‑fermion systems that includes dissipation and fluctuations, and demonstrates the approach by calculating fission fragment yields for ^258Fm.
Abstract
We outline an extension of the classical Langevin equation to a quantum formulation of the treatment of dissipation and fluctuations of all collective degrees of freedom with unitary evolution of a many-fermion system within an extension of the time-dependent density functional theory. We illustrate the method by computing the distribution of fission fragment yields for $^{258}$Fm in a quantum hydrodynamic approach and a typical trajectory with full unrestricted density functional theory augmented with dissipation and fluctuations.
9 pages, 4 figures