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	Séminaires à venir dans la série RENC-THEO
[ vue agenda ]

Jeudi 6 Avril 2023, 10:00 à IHP, Grisvard (314) RENC-THEO (Rencontres Théoriciennes) hep-th

Sean Hartnoll ( Cambridge ) Entanglement and Emergent Space from Large Matrices

Abstract: The locality in space of interactions between elementary particles is a key property of our universe. This locality is hardwired into quantum field theoretic descriptions of nature. However, locality and indeed space itself are likely not fundamental concepts. In holographic duality, local interactions on a dynamical spacetime emerge from "large N" matrices where no locality is manifest in the microscopic Hamiltonian. The emergence of locality from matrix theories is well-established but not well-understood. In recent years it has been appreciated that locality is closely tied up with so-called “area law” entanglement of the microscopic degrees of freedom. I will discuss a particularly robust notion of entanglement in matrix theories that is rooted in an underlying Gauss law constraint and show how simple models of matrix, or ‘fuzzy' geometry contain area law entanglement.

Jeudi 6 Avril 2023, 11:45 à IHP, Grisvard (314) RENC-THEO (Rencontres Théoriciennes) hep-th

Aristomenis Donos ( Durham ) Nearly critical superfluids and holography

Abstract: I will discuss the low energy dynamics of systems which are close to a superfluid phase transition. In addition to the hydrodynamics of conserved quantities and the Goldstone mode, the amplitude of the order parameter needs to be included in the description. After presenting a field theoretic construction of a suitable effective theory, I will examine the phenomenology of suitable holographic systems.

Jeudi 11 Mai 2023, 10:00 à IHP, Grisvard (314) RENC-THEO (Rencontres Théoriciennes) hep-th

Daniel Kapec ( Harvard ) TBA

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Jeudi 6 Avril 2023, 10:00 à IHP, Grisvard (314)	RENC-THEO (Rencontres Théoriciennes)	hep-th
Sean Hartnoll ( Cambridge )	Entanglement and Emergent Space from Large Matrices
Abstract:	The locality in space of interactions between elementary particles is a key property of our universe. This locality is hardwired into quantum field theoretic descriptions of nature. However, locality and indeed space itself are likely not fundamental concepts. In holographic duality, local interactions on a dynamical spacetime emerge from "large N" matrices where no locality is manifest in the microscopic Hamiltonian. The emergence of locality from matrix theories is well-established but not well-understood. In recent years it has been appreciated that locality is closely tied up with so-called “area law” entanglement of the microscopic degrees of freedom. I will discuss a particularly robust notion of entanglement in matrix theories that is rooted in an underlying Gauss law constraint and show how simple models of matrix, or ‘fuzzy' geometry contain area law entanglement.