Microscopic theory of hidden metastable phases and the role of inhomogeneous disordering at photo-induced phase transitions

Martin Eckstein
The theoretical understanding of hidden phases in strongly correlated quantum systems has been a challenge, because of the large separation of timescales between the intertwined dynamics of  electrons, the lattice, and relevant order parameters. To overcome this limitation, we develop a theoretical approach which builds on a non-perturbative quasi-steady description of the electronic state, and a stochastic semiclassical evolution of the lattice.  In a first application, we found that even within a minimal model for a charge density wave material, photo-excitation can result in an in-homogeneously disordered phase, with profound
effect on the long-time dynamics.