ELFT HÍRADÓ

[tcsaba <tcsaba AT eik.bme.hu>]

                 M E G H Í V Ó - I N V I T A T I O N

    Seminar Series of the Department of Theoretical Physics at the
           Budapest University of Technology and Economics

                          Péter Vrana
                  (Department of Geometry,
         Budapest University of Technology and Economics)


    Approximately simplified structure of quasipinned states

The eigenvalues of the 1-body reduced state of a fermionic pure state 
satisfies a set of linear inequalitites, called generalized Pauli 
constraints. Whenever one of these constraints is saturated (pinning), 
the state can be shown to exhibit a simplified structure, which can be 
formulated in terms of selection rules in the basis given by the natural 
orbitals. On the other hand, examples suggest that some interacting few 
fermion models tend to have ground states with the property that some of 
these constraints are close to being saturated (quasipinning). We prove 
that this implies that the state is well approximated by an exactly 
pinned one, allowing for a simplified approximate description. Joint 
work with Christian Schilling and Carlos Benavides-Riveros.


Időpont: 2017. szeptember 15. péntek, 10:15
Helyszín: BME Fizikai Intézet, Elméleti Fizika Tanszék,
Budafoki út 8. F-épület, III lépcsőház, szemináriumi szoba