Electron-phonon thermalization in a scalable method for real-time quantum dynamics

Valerio Rizzi, Tchavdar N. Todorov, Jorge Kohanoff, Alfredo A. Correa

Research output: Contribution to journalArticle

8 Citations (Scopus)
249 Downloads (Pure)

Abstract

We present a quantum simulation method that follows the dynamics of out-of-equilibrium many-body systems of electrons and oscillators in real time. Its cost is linear in the number of oscillators and it can probe time scales from attoseconds to hundreds of picoseconds. Contrary to Ehrenfest dynamics, it can thermalize starting from a variety of initial conditions, including electronic population inversion. While an electronic temperature can be defined in terms of a nonequilibrium entropy, a Fermi-Dirac distribution in general emerges only after thermalization. These results can be used to construct a kinetic model of electron-phonon equilibration based on the explicit quantum dynamics.
Original languageEnglish
Article number024306
Number of pages7
JournalPhysical Review B (Condensed Matter)
Volume93
Issue number2
DOIs
Publication statusPublished - 27 Jan 2016

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