Deutsch Intern
Theoretical Physics III

Department Chair

Prof. Dr. Johanna Erdmenger    

    Roomnumber: 02.022


Frau Nelia Meyer

    Roomnumber: 02.024
    Building: M1

    Tel.: 0049-931-31-85131
    Fax: 0049-931-31-85939

Mailing Address:

Lehrstuhl für Theoretische Physik III

Institut für Theoretische Physik und Astrophysik
Universität Würzburg
Am Hubland
97074 Würzburg

Here are directions to our chair

Angebote im Sommersemester 2017:

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[Translate to Englisch:] logo tp3


Dr. Andy O`Bannon (University of Southampton)

Time and Venue:

Thu Aug 3, 14:15  seminar room SE5


A c-Theorem for Two-dimensional Boundaries and Defects


I will present a proof for a monotonicity theorem, or c-theorem, for a three-dimensional Conformal Field Theory (CFT) on a space with a boundary, and for a higher-dimensional CFT with a two-dimensional defect. The proof is applicable only to renormalization group flows that preserve locality, reflection positivity, and Euclidean invariance along the boundary or defect, and that are localized at the boundary or defect, such that the bulk theory remains conformal along the flow. The method of proof is a generalization of Komargodski’s proof of Zamolodchikov’s c-theorem. The key ingredient is an external “dilaton” field introduced to match Weyl anomalies between the ultra-violet (UV) and infra-red (IR) fixed points. Reflection positivity in the dilaton’s effective action guarantees that a certain coefficient in the boundary/defect Weyl anomaly must take a value in the UV that is larger than (or equal to) the value in the IR. This boundary/defect c-theorem may have important implications for many theoretical and experimental systems, ranging from graphene to branes in string theory and M-theory.


Summary of the work of our Chair:

Our research consists of establishing new relations between quantum field theory on the one hand and gravitation on the other. These new relations are called dualities. In this way, we gain new insights into the quantum nature of gravity. Moreover, we use these dualities to calculate observables for strongly coupled quantum systems. These systems occur frequently in physics, but are often difficult to describe with established methods. Our methods are applicable to condensed matter physics as well as elementary particle physics. A further research focus are new connections between quantum information and statistical mechanics.

[Translate to Englisch:] Berechnung physikalischer Observablen in stark korrelierten Systemen aus der dualen Gravitationstheorie mit schwarzem Loch

Calculation of physical observables in strongly coupled systems from the dual black hole geometry

Aktuelle Veröffentlichungen

Arbeit zur Zeitabhängigkeit im holographischen Kondo-Modell zur Veröffentlichung angenommen:

J. Erdmenger, M. Flory, M. Newrzella, M. Strydom, J. Wu, Quantum quenches in a holographic Kondo model', accepted for publication in Journal of High Energy Physics.



Lehrstuhl für Theoretische Physik III
Am Hubland
97074 Würzburg

Phone: +49 931 31-85131
Fax: +49 931 31-85141

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Hubland Süd, Geb. P1