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[Fizinfo] BME Elméleti Fizika Tanszék szemináriuma

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  • From: tcsaba <tcsaba AT>
  • To: fizinfo AT
  • Subject: [Fizinfo] BME Elméleti Fizika Tanszék szemináriuma
  • Date: Sun, 10 Sep 2017 12:11:59 +0200

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

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