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UID:69e17db369c5f
DTSTAMP:20260416T202419
DTSTART:20130222T113000
SEQUENCE:0
TRANSP:OPAQUE
DTEND:20130222T123000
URL:https://murmitoyen.com/events/vanille/udem/detail/173466
LOCATION:Université de Montréal - Pavillon Roger-Gaudry\, 2900\, chemin d
 e la Tour\, Montréal\, QC\, Canada\, H3T 1J6
SUMMARY:Pinning of Fermionic Occupation Numbers
DESCRIPTION:Mathias Christiandl\, ETH - Institute of Theoretical Physics\, 
 ZurichRésumé/abstract:The Pauli exclusion principle is a constraint on t
 he natural occupation numbers of fermionic states. It has been suspected s
 ince at least the 1970's\, and only proved very recently\, that there is a
  multitude of further constraints on these numbers\, generalizing the Paul
 i exclusion principle. This is a beautiful mathematical result\, but are t
 here systems whose physics is governed by these constraints? In order to a
 ddress this question\, we studied a system of a few fermions connected by 
 springs. As we varied the spring constant\, the occupation numbers moved w
 ithin the region allowed by the newly-found constraints. Strikingly\, the 
 path they traced hugs very close to the boundary of the allowed region\, s
 uggesting that the influence of the generalized constraints affects the sy
 stem. I will discuss implications of these findings for the structure of f
 ew-fermion ground states\; exploring the consequences for neutron stars re
 mains the challenge.Cette conférence s'adresse à tous\, y compris les pr
 ofesseurs\, les chercheurs et les étudiants des trois cycles.Le café est
  servi à partir de 11h20.Cette conférence est présentée par le Départ
 ement de physique de l'Université de Montréal.
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