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[Fizinfo] BME Elm. Fiz. Szeminárium, máj. 3. Pintér Gergő

From: Janos Asboth <asboth.janos AT ttk.bme.hu>
To: fizinfo AT lists.kfki.hu, elmfiz.oktatok-kutatok AT lists.bme.hu, elmfiz.hallgatok AT lists.bme.hu, Gergő Pintér <lapaatkereek AT gmail.com>
Subject: [Fizinfo] BME Elm. Fiz. Szeminárium, máj. 3. Pintér Gergő
Date: Thu, 2 May 2024 07:11:13 +0200
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Meghívó

BME Elméleti Fizika Szeminárium,

máj. 3. péntek 10h15,

1111 Budapest, Budafoki út 8., BME F III. magasföldszint 01.,
Elméleti Fizika Tanszék szemináriumi szoba

Pintér Gergő (BME Elméleti Fizika Tanszék)
The geometry of the hermitian matrix space and the Schrieffer-Wolff
transformation

In quantum mechanics, the Schrieffer-Wolff transformation (SW, also called
quasi-degenerate perturbation theory) is known as an approximative method
to reduce the dimension of the Hamiltonian. In the talk a geometric
interpretation of the SW is presented [1] as a local coordinate chart in
the space of hermitian matrices near the degeneracy stratum. Inspired by
this approach, the splitting of the eigenvalues of a perturbation is
interpreted in terms of the distancing from the degeneracy stratum. The
physical examples range widely, including problems from condensed matter
physics and quantum error correction.

[1] Joint work with György Frank, Dániel Varjas, András Pályi

Minden érdeklődőt szeretettel várunk.
Asbóth János,
szemináriumi koordinátor

[Fizinfo] BME Elm. Fiz. Szeminárium, máj. 3. Pintér Gergő, Janos Asboth, 05/02/2024