University of Sydney

## Talks by Stephen Bartlett

## Symmetry, topology, and thermal stability

Stephen Bartlett
University of Sydney

The interplay of symmetry and topology in quantum many-body systems can lead to novel phases of matter, with applications in quantum memories and resources for quantum computing. While we understand the range of phenomena quite well in 2-d systems, there are many open questions for the 3-d case, in particular what kind of symmetries and topology can allow for thermal stability in 3-d models. I’ll present some of the results and open questions in this direction, using the 3-d toric code and the RBH models as examples.

## Contextuality and quantum simulation

Stephen Bartlett
University of Sydney

## PSI 2016/2017 - Quantum Theory - Lecture 12

Stephen Bartlett
University of Sydney

Tensor networks – an introduction

## PSI 2016/2017 - Quantum Theory - Lecture 11

Stephen Bartlett
University of Sydney

Perturbation theory – Schrieffer-Wolf (arXiv:1105.0675)

## PSI 2016/2017 - Quantum Theory - Lecture 10

Stephen Bartlett
University of Sydney

Perturbation theory – Schrieffer-Wolf (arXiv:1105.0675)

## PSI 2016/2017 - Quantum Theory - Lecture 9

Stephen Bartlett
University of Sydney

Quantum measurement – von Neumann, QND, weak measurements, Wigner’s friend

## PSI 2016/2017 - Quantum Theory - Lecture 8

Stephen Bartlett
University of Sydney

Quantum noise (N&C Chapter 8)

## PSI 2016/2017 - Quantum Theory - Lecture 7

Stephen Bartlett
University of Sydney

Quantum harmonic oscillator – Standard treatment based on creation/annihilation operators