University of Cambridge > Talks.cam > Irregular seminars in TCM > Probing many-body physics with cold atoms: The Higgs boson and quantum hexatic order.

  Browse A-Z

Log in

Cambridge users (raven)details Other usersdetails No account?details

Information on

Subscribing to talksdetails Finding a talkdetails Adding a talkdetails Disseminating talksdetails Help and Documentationdetails

Probing many-body physics with cold atoms: The Higgs boson and quantum hexatic order.

Add to your list(s) Download to your calendar using vCal

If you have a question about this talk, please contact Dr G Moller.

n this talk, I describe how cold atoms can be used to test two phenomena which play a key role in our description of quantum many-body physics.

The first is the Higgs mode, which plays a fundamental role for our understanding of both low and high energy physics, giving elementary particles their mass and leading to collective modes in condensed matter and nuclear systems. The Higgs mode has been observed in a limited number of table-top systems, where it however is characterised by a short lifetime due to decay into a continuum of modes. A major goal which has remained elusive so far, is therefore to realise a long-lived Higgs mode in a controllable system. Here, we show how an undamped Higgs mode can be observed unambiguously in a Fermi gas in a two-dimensional trap, close to a quantum phase transition between a normal and a superfluid phase. The second phenomena is the hexatic phase, which is a phase in between a liquid and a crystal. We show how such a phase can be realised in the quantum regime for the first time, using a two-dimensional gas of dipolar molecules. We derive approximate phase diagrams using a pair of Lindemann criteria, suitably adapted to deal with effects of thermal fluctuations in two dimensions. The hexatic phase is predicted to survive down to very low temperatures.

This talk is part of the Irregular seminars in TCM series.

Tell a friend about this talk:

This talk is included in these lists:

Note that ex-directory lists are not shown.

Other lists

Different Views: E&D Lunchtime Sessions HORIZON: Reproductive Health DAMTP Departmental Seminar The Milner Therapeutics Institute: A new vehicle to facilitate academic/industry interactions in Cambridge Centre for Molecular Science Informatics Cambridge Carbon Footprint

Other talks

Babraham Distinguished Lecture - Endoplasmic reticulum turnover via selective autophagy Lunchtime Talk: Helen's Bedroom What sort of challenge is climate change? Fifty years of editorialising in ‘Nature’ and ‘Science’ Respiratory Problems Kiwi Scientific Acceleration on FPGA Comparative perspectives on social inequalities in life and death: an interdisciplinary conference
 

© 2006-2024 Talks.cam, University of Cambridge. Contact Us | Help and Documentation | Privacy and Publicity