PERIMETER INSTITUTE RECORDED SEMINAR ARCHIVE
 | Tensor networks and Legendre transforms Speaker(s): Brian Swingle
Abstract: Tensor networks have primarily, thought not exclusively, been used to the describe quantum states of lattice models where there is some inherent discreteness in the system. This raises issues when trying to describe quantum field theories using tensor networks, since the field theory is continuous (... read more
Date: 19/04/2017 - 2:00 pm
Collection: Tensor Networks for Quantum Field Theories II
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 | Tensor Network Holography
Abstract:
Date: 28/07/2016 - 2:30 pm
Collection: It from Qubit Summer School
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 | Informal Talk on geometry of tensor networks (MERA) and AdS/CFT Speaker(s): Brian Swingle
Abstract: Brian Swingle obtained his PhD from MIT in 2011 and then moved to Harvard, where he is currently a Simons Fellow in condensed matter physics. Swingle is interested in the physics of quantum matter, and especially in the interface between condensed matter physics, quantum information science, and gra... read more
Date: 28/05/2014 - 4:30 pm
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 | Einstein's equations from qubits Speaker(s): Brian Swingle
Abstract: I will outline a path by which a semi-classical geometry obeying Einstein's equations emerges holographically from elementary quantum mechanical objects undergoing local dynamics. The key idea is that entanglement between the quantum degrees of freedom leads to the emergence of a dynamical geometry,... read more
Date: 26/05/2014 - 2:30 pm
Collection: Low Energy Challenges for High Energy Physicists
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 | Incoherent metals Speaker(s): Brian Swingle
Abstract: I'll talk about some work in progress concerning the topic of metals which have no coherent quasiparticles. In particular, I'll compare and contrast the ubiquitous near horizon AdS2 region appearing in holographic models with a phase of matter called the spin incoherent luttinger liquid. By analyzin... read more
Date: 13/02/2014 - 11:00 am
Collection: Emergence in Complex Systems
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 | Asymmetry protected emergent E8 symmetry Speaker(s): Brian Swingle
Abstract: The E8 state of bosons is a 2+1d gapped phase of matter which has no topological entanglement entropy but has protected chiral edge states in the absence of any symmetry. This peculiar state is interesting in part because it sits at the boundary between short- and long-range entangled phas... read more
Date: 06/05/2013 - 4:00 pm
Collection: Emergence & Entanglement II 2013
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 | Entanglement and the Fermi surface Speaker(s): Brian Swingle
Abstract: In this talk I will describe my work characterizing
quantum entanglement in systems with a Fermi surface. This class includes everything from Fermi
liquids to exotic spin liquids in frustrated magnets and perhaps even
holographic systems. I review my
original scaling argument... read more
Date: 27/11/2012 - 3:30 pm
Series: Quantum Matter
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 | Entanglement Spectrum from Geometry Speaker(s): Brian Swingle
Abstract: The entanglement spectrum denotes the eigenvalues of the reduced density matrix of a region in the ground state of a many-body system. Given these eigenvalues, one can compute the entanglement entropy of the region, but the full spectrum contains much more information. I will review geometric method... read more
Date: 09/12/2011 - 2:30 pm
Series: Quantum Matter
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 | Mutual information and the structure of entanglement in quantum field theory Speaker(s): Brian Swingle
Abstract: In this talk I will describe my recent work on the structure of entanglement in field theory from the point of view of mutual information. I will give some basic scaling intuition for the entanglement entropy and then describe how this intuition is better captured by the mutual information. I will a... read more
Date: 26/10/2010 - 2:00 pm
Series: Quantum Matter
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