PIRSA:C15041 - Quantum Information in Quantum Gravity IIPODCAST Subscribe to podcast

Quantum Information in Quantum Gravity II


Collection URL: http://pirsa.org/C15041

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PIRSA:15080059  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Gravity Dual of Quantum Information Metric
Speaker(s): Tadashi Takayanagi
Abstract: We study a quantum information metric (or fidelity susceptibility) in conformal field theories with respect to a small perturbation by a primary operator. We argue that its gravity dual is approximately given by a volume of maximal time slice in an AdS spacetime when the perturbation is exactly marg... read more
Date: 17/08/2015 - 9:05 am

PIRSA:15080060  ( MP4 Medium Res , MP3 , PDF ) Which Format?
A new perspective on holographic entanglement
Speaker(s): Matthew Headrick
Abstract: We will present a reformulation of the Ryu-Takayanagi holographic entanglement entropy formula which does not involve the areas of surfaces. The reformulation leads to a picture of entanglement entropy of boundary regions being carried by Planck-thickness "bit threads" in the bulk. We will argue tha... read more
Date: 17/08/2015 - 11:00 am

PIRSA:15080061  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Universal holographic description of CFT entanglement entropy
Speaker(s): Thomas Faulkner
Abstract: The Ryu-Takayanagi proposal (and generalizations) for holographic entanglement makes predictions for geometric CFT entanglement entropy (EE) that continue to hold for any CFT, regardless of existence of large-N limit or strong coupling. We establish this using a direct field theory calculation, thus... read more
Date: 17/08/2015 - 2:00 pm

PIRSA:15080062  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Geometric Constructs in AdS/CFT
Speaker(s): Veronika Hubeny
Abstract: TBA
Date: 17/08/2015 - 4:00 pm

PIRSA:15080063  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Do black holes create polyamory
Speaker(s): Jonathan Oppenheim
Abstract: Of course not, but if one believes that information cannot be destroyed in a theory of quantum gravity, then we run into apparent contradictions with quantum theory when we consider evaporating black holes. Namely that the no-cloning theorem or the principle of entanglement monogamy is violated. Her... read more
Date: 17/08/2015 - 5:00 pm

PIRSA:15080065  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Tensor Network Renormalization and the MERA
Speaker(s): Glen Evenbly
Abstract: I describe a class of non-perturbative renormalization group (RG) transformations which, when applied to the (discrete time) Euclidean path integrals of a quantum systems on the lattice, can give results consistent with conformal transformations of quantum field theories. In particular, this class o... read more
Date: 18/08/2015 - 9:00 am

PIRSA:15080119  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Entanglement renormalization for quantum fields
Speaker(s): Jutho Haegeman
Abstract: The Multiscale Entanglement Renormalization Ansatz has proven to capture the ground state properties of strongly correlated quantum lattice systems, both in gapped regimes and at critical points, and realizes a lattice version of the holographic principle. In this talk, I will review a construction ... read more
Date: 18/08/2015 - 11:00 am

PIRSA:15080066  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Holographic quantum error-correcting codes: Toy models for the bulk/boundary correspondence
Speaker(s): Fernando Pastawski
Abstract: In this talk I will introduce a family of exactly solvable toy models of a holographic correspondence based on a novel construction of quantum error-correcting codes with a tensor network structure. The building block for these models are a special type of tensor with maximal entanglement along any ... read more
Date: 18/08/2015 - 2:00 pm

PIRSA:15080067  ( MP4 Medium Res , MP3 , PDF ) Which Format?
The Holographic Entropy Cone
Speaker(s): Ning Bao
Abstract: We initiate a systematic enumeration and classification of entropy inequalities satisfied by the Ryu-Takayanagi formula for conformal field theory states with smooth holographic dual geometries. For 2, 3, and 4 regions, we prove that the strong subadditivity and the monogamy of mutual information gi... read more
Date: 18/08/2015 - 4:00 pm

PIRSA:15080068  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Spread of entanglement and causality
Speaker(s): Mark Mezei
Abstract: We investigate causality constraints on the time evolution of entanglement entropy after a global quench. We analyze three models for the spread of entanglement: holographic quenches, the free particle streaming model of Calabrese and Cardy generalized to higher dimensions and an arbitrary pattern o... read more
Date: 18/08/2015 - 4:30 pm

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