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PERIMETER INSTITUTE RECORDED SEMINAR ARCHIVE

PIRSA:15030091  ( MP4 Medium Res , MP3 , PDF ) Which Format?
The renormalization group: a tensor network perspective
Speaker(s): Guifre Vidal
Abstract:

A renormalization group transformation implements a scale transformation while resetting the UV cut-off, so that the theories before and after the RG transformation contain the same degrees of freedom, but with a modified action. In Wilson's original proposal, the cut-off is reset by integrating out the degrees of freedom between the old and new cut-off. In recent years we have learned that, alternatively, one can decouple these degrees of freedom by means of local unitary transformations (disentanglers). The result is a reversible renormalization group flow, and an efficient description of many-body ground states. In this talk, I will show you pretty drawings and will use fancy names, such as "multi-scale entanglement renormalization ansatz" (MERA). MERA is currently studied as a possible lattice realization of the AdS/CFT correspondence. I will keep it simple.

Date: 12/03/2015 - 2:30 pm
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