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UID:0-788@lptms.universite-paris-saclay.fr
DTSTART;TZID=Europe/Paris:20211026T110000
DTEND;TZID=Europe/Paris:20211026T120000
DTSTAMP:20211013T105934Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lptm
 s-sara-murciano-sissa-1/
SUMMARY:Séminaire du LPTMS : Sara Murciano (SISSA) - Salle des séminaires
  du FAST et du LPTMS\, bâtiment Pascal n°530 - 26 Oct 21 11:00
DESCRIPTION:Symmetry-resolved entanglement and negativity in systems with U
 (1) symmetry\nSara Murciano (International School for Advanced Studies)\nO
 nsite seminar + zoom (ID: 948 1788 3604\,  Passcode: B3McPy).\n\nSymmetri
 es are a pillar of modern physics and an evergreen research topic is the c
 haracterisation of how the presence of a symmetry influences the propertie
 s of a physical system. I will present an analysis of the entanglement ent
 ropies and negativities related to different symmetry sectors of systems w
 ith an internal U(1) symmetry. The entanglement entropy admits a decomposi
 tion according to its total preserved charge thanks to the block diagonal 
 form of the density matrix. Despite this structure becomes nontrivial afte
 r the operation of partial transposition on the density matrix\, it has be
 en shown that negativity admits a resolution in terms of the charge imbala
 nce between two subsystems. I will focus on the resolution of entanglement
  and negativity for free Dirac fields in two spacetime dimensions at finit
 e temperature and size. To this end\, I use a geometrical construction in 
 terms of an Aharonov-Bohm-like flux inserted in the Riemann surface defini
 ng the entanglement. The main interesting finding is that both entanglemen
 t entropy and negativity are equally distributed among the different symme
 try sectors at leading order.\n\n&nbsp\;
CATEGORIES:seminars
LOCATION:Salle des séminaires du FAST et du LPTMS\, bâtiment Pascal n°53
 0\, rue André Riviere\, Orsay\, 91405\, France
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=rue André Riviere\, Orsay\
 , 91405\, France;X-APPLE-RADIUS=100;X-TITLE=Salle des séminaires du FAST 
 et du LPTMS\, bâtiment Pascal n°530:geo:0,0
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DTSTART:20210328T030000
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