# Video Library

Since 2002 Perimeter Institute has been recording seminars, conference talks, public outreach events such as talks from top scientists using video cameras installed in our lecture theatres.  Perimeter now has 7 formal presentation spaces for its many scientific conferences, seminars, workshops and educational outreach activities, all with advanced audio-visual technical capabilities.

Recordings of events in these areas are all available and On-Demand from this Video Library and on Perimeter Institute Recorded Seminar Archive (PIRSA)PIRSA is a permanent, free, searchable, and citable archive of recorded seminars from relevant bodies in physics. This resource has been partially modelled after Cornell University's arXiv.org.

Accessibly by anyone with internet, Perimeter aims to share the power and wonder of science with this free library.

## Graduate Course on Standard Model & Quantum Field Theory - 10A

Wednesday Jan 24, 2007
Speaker(s):

Graduate Course on Standard Model & Quantum Field Theory

## Quantum Error Correction 3B

Tuesday Jan 23, 2007
Speaker(s):

Clifford group as symplectic group, generators of the Clifford group & encoding circuits for stabilizer codes, efficient simulation of Clifford group circuits, efficient simulation of Pauli measurements

## Quantum Error Correction 3A

Tuesday Jan 23, 2007
Speaker(s):

Finite field GF(4), stabilizer codes as GF(4) codes, perfect quantum codes, definition of Clifford group, sample elements of Clifford group

## Domain Lines as Fractional Strings

Tuesday Jan 23, 2007
Speaker(s):

We consider N=2 supersymmetric quantum electrodynamics (SQED) with 2 flavors, the Fayet--Iliopoulos parameter, and a mass term $beta$ which breaks the extended supersymmetry down to N=1. The bulk theory has two vacua; at $beta=0$ the BPS-saturated domain wall interpolating between
them has a moduli space parameterized by a U(1) phase $sigma$ which can
be promoted to a scalar field in the effective low-energy theory on the
wall world-volume. At small nonvanishing $beta$ this field gets a
sine-Gordon potential. As a result, only two discrete degenerate BPS

Collection/Series:
Scientific Areas:

## Quantum Simulations of Quantum and Classical Systems

Monday Jan 22, 2007
Speaker(s):

If a large quantum computer (QC) existed today, what type of physical problems could we efficiently simulate on it that we could not simulate on a conventional computer? In this talk, I argue that a QC could solve some relevant physical "questions" more efficiently. First, I will focus on the quantum simulation of quantum systems satisfying different particle statistics (e.g., anyons), using a QC made of two-level physical systems or qubits.

Scientific Areas:

## An Information-Theoretic Approach to Quantum Theory

Monday Jan 22, 2007
Speaker(s):

The mathematical formalism of quantum theory has many features whose physical origin remains obscure. In this paper, we attempt to systematically investigate the possibility that the concept of information may play a key role in understanding some of these features. We formulate a set of assumptions, based on generalizations of experimental facts that are representative of quantum phenomena and physically comprehensible theoretical ideas and principles, and show that it is possible to deduce the finite-dimensional quantum formalism from these assumptions.

Collection/Series:
Scientific Areas:

## Introduction to quantum groups 3

Monday Jan 22, 2007
Speaker(s):

Universal Enveloping Algebras and dual Algebras of Functions
The two most relevant types of Hopf-algebras for applications in physics are discussed in this unit. Most central notion will be their duality and representation.

Motivation: From Quantum Mechanics to Quantum Groups

## Introduction to quantum groups 2

Friday Jan 19, 2007
Speaker(s):

Hopf-Algebras and their Representations
In order to consolidate the above motivation, we have to introduce Hopf-algebras on a mathematical footing. We define Hopf-algebras, discuss duality and especially we will have a closer look at the question why coproducts induce a multiplication on the dual algebra but not the other why around. With these preparations we close this unit by the discussion of representations and corepresentations - and how these are related for dual Hopf-algebras.

## Introduction to quantum groups 1

Thursday Jan 18, 2007
Speaker(s):

Motivation: From Quantum Mechanics to Quantum Groups
The notion of 'quantization' commonly used in textbooks of quantum mechanics has to be specified in order to turn it into a defined mathematical operation. We discuss that on the trails of Weyl's phase space deformation, i.e. we introduce the Weyl-Moyal starproduct and the deformation of Poisson-manifolds.
Generalizing from this, we understand, why Hopf-algebras are the most genuine way to apply 'quantization'
to various other algebraic objects - and why this has direct physical applications.

## Geometric measure of entanglement and its applications to multi-partite states and quantum phase transitions

Wednesday Jan 17, 2007
Speaker(s):

A multi-partite entanglement measure is constructed via the distance or angle of the pure state to its nearest unentangled state.

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## Next Public Lecture

### CLIFFORD JOHNSON: UNIVERSITY OF SOUTHERN CALIFORNIA

Wednesday Feb 06, 2019

## LECTURES ON-DEMAND

### Jocelyn Bell Burnell: University of Oxford

Speaker: Jocelyn Bell Burnell