Non-equilibrium dynamics and many-body entanglement with cold atoms and trapped ions

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• Prof. Andrew Daley, UoStrathclyde.
• Thursday 30 October 2014, 13:45-15:00
• Theory Library.

If you have a question about this talk, please contact Kevin Ralley.

In recent years, a lot of progress has been made in exploring and understanding out of equilibrium dynamics of many-body quantum systems. This is partly motivated by the time-dependent control available over experiments with ultracold atoms, where the microscopic parameters can be varied time-dependently and the resulting dynamics directly observed. Among the interesting quantities that can be explored are the spread of correlation functions and the build-up of bipartite entanglement during such dynamics.

A new set of possibilities has similarly been provided by recent experiments with trapped ions, in which it is possible to engineer spin-spin coupling with a tunable range of interactions, which decay approximately algebraically in space with a controllable exponent. This changes the dynamics of spreading correlations and entanglement, and can give rise to counter-intuitive situations, including examples where long-range interactions lead to a slower growth of entanglement than short-range interactions. I will give an introduction to our work in this direction, comparing dynamics in systems with long and short-range interactions. I will also discuss how non-equilibrium dynamics can be used as a tool to prepare many-body states, including the generation of dominant effective three-body interactions in experiments.

This talk is part of the Theoretical Physics Seminars series.

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• Bham Talks
• Theoretical Physics Seminars
• Theory Library
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