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Calendar of Physics Talks Vienna
| Using Matrix Product States to Classify Quantum Phases in (1+1)D (Vienna Theory Lunch Seminar) |
| Speaker: | David Blanik (Universität Wien) |
| Abstract: |
Understanding the phase diagram of correlated quantum many-body systems is among the most important and most challenging tasks towards a comprehensive understanding of such systems. In this talk I will give a brief introduction to tensor networks and explain how to use tensor network methods, in particular Matrix Product States (MPS), to classify gapped quantum phases. Specifically, we will derive the well known classification of symmetry-protected topological (SPT) phases in (1+1)D.
[[This talk is part of the "Vienna Theory Lunch Seminar", a weekly seminar aimed at both graduate and advanced undergraduate students, jointly organized by the University of Vienna and TU Wien. The focus of the seminar is on recent theoretical research done by Master students, PhDs and PostDocs. Free lunch (pizza) will be provided at the seminar. More information: https://lunch-seminar.univie.ac.at ]] |
| Date: | Tue, 21.11.2023 |
| Time: | 12:30 |
| Duration: | 75 min |
| Location: | Boltzmanngasse 5, 5th floor, Schrödinger Lecture Hall |
| Contact: | Florian Lindenbauer |
| Rigidity of extremal horizons and black hole uniqueness |
| Speaker: | James Lucietti (Edinburgh) |
| Abstract: | I will present a recent proof which shows that the intrinsic geometry of compact cross-sections of any vacuum extremal horizon, possibly with a cosmological constant, must admit a Killing vector field.
In particular, this implies that the extremal Kerr horizon is the most general such horizon in four-dimensional General Relativity and completes the classification of the associated near-horizon geometries.
I will also discuss a recent uniqueness proof which shows that any analytic Einstein spacetime, that contains a static extremal horizon with a maximally symmetric compact cross-section,
is the extremal Schwarzschild de Sitter spacetime or its near-horizon geometry. |
| Date: | Wed, 22.11.2023 |
| Time: | 14:15 |
| Duration: | 60 min |
| Location: | Seminarraum A, Waehringer StraÃe 17, 2. Stock |
| Contact: | P. Chrusciel, D. Fajman |
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