Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Status Confirmed
Seminar Series LPTMS
Subjects cond-mat.stat-mech
Date Tuesday 21 June 2022
Time 11:00
Institute LPTMS
Seminar Room Salle des séminaires du FAST et du LPTMS, bâtiment Pascal n°530
Speaker's Last Name Znidaric
Speaker's First Name Marko
Speaker's Email Address
Speaker's Institution University of Ljubljana
Title Non-Hermitian phantoms
Abstract Describing full unitary dynamics of a many-body system is difficult and also unpractical. Focusing on a coarse-grained dynamics, or few select smooth observables, often results in a more compact non-unitary evolution. Studying bipartite entanglement dynamics in random circuits one can derive a Markovian transfer matrix description that harbors rather intriguing many-body non-Hermitian physics. The speed of generating entanglement is not given by the 2nd largest eigenvalue of the transfer matrix, but rather by a phantom eigenvalue that is not in the spectrum of any finite transfer matrix. Resolution of this seeming paradox will involve a spectrum that is completely discontinuous in the thermodynamic limit. When dealing with finite non- Hermitian matrices it can turn out that being exact is actually wrong, while being slightly wrong is correct.
arXiv Preprint Number
Comments For zoom info, please write to or check LPTMS website

To Generate a poster for this seminar : [ Postscript | PDF ]

[ Annonces ]    [ Abonnements ]    [ Archive ]    [ Aide ]    [ ]
[ English version ]