@article{ISI:000403351700012,
 abstract = {We examine the exact equation of motion for the relaxation of
populations of strongly correlated electrons after a nonequilibrium
excitation by a pulsed field, and prove that the populations do not
change when the Green's functions have no average time dependence. We
show how the average time dependence enters into the equation of motion
to lowest order and describe what governs the relaxation process of the
electron populations in the long-time limit. While this result may
appear, on the surface, to be required by any steady-state solution, the
proof is nontrivial, and provides new critical insight into how
nonequilibrium populations relax, which goes beyond the assumption that
they thermalize via a simple relaxation rate determined by the imaginary
part of the self-energy, or that they can be described by a
quasi-equilibrium condition with a Fermi-Dirac distribution and a
time-dependent temperature. We also discuss the implications of this
result to approximate theories, which may not satisfy the exact relation
in the equation of motion.},
 article-number = {1600042},
 author = {Kemper, A. F. and Krishnamurthy, H. R. and Freericks, J. K.},
 doi = {10.1002/prop.201600042},
 eissn = {1521-3978},
 issn = {0015-8208},
 journal = {FORTSCHRITTE DER PHYSIK-PROGRESS OF PHYSICS},
 month = {JUN},
 note = {Conference on Frontiers of Quantum and Mesoscopic Thermodynamics (FQMT),
Prague, CZECH REPUBLIC, JUL 27-AUG 01, 2015},
 number = {6-8, SI},
 orcid-numbers = {Freericks, James K/0000-0002-6232-9165
Kemper, A. F./0000-0002-5426-5181},
 researcherid-numbers = {Freericks, James K/D-7502-2011
Kemper, A. F./F-8243-2016},
 times-cited = {1},
 title = {The role of average time dependence on the relaxation of excited
electron populations in nonequilibrium many-body physics},
 unique-id = {ISI:000403351700012},
 volume = {65},
 year = {2017}
}