Quantum geometry and topology with (a) spin

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

• Dr Gunnar Lange (Oslo)
• Friday 11 April 2025, 15:00-16:30
• Meeting Room 3 in the RDC (third floor, close to the cafeteria).

If you have a question about this talk, please contact Bo Peng.

The geometry of quantum states has long attracted attention in various communities, as it is useful in optics, superfluidity and perhaps most intriguingly quantum metrology. Recently, it has been shown that the topology of a set of quantum states constrain their geometry in a non-trivial way.

In this talk, I will begin by defining quantum geometry, and its relation to Chern topology in time-reversal symmetry broken systems. I will then discuss how to extend these ideas to time-reversal symmetric systems, by considering the projected spin spectrum.

The latter part of the talk will be largely based on: W. J. Jankowski, R.-J. Slager, and G. F. Lange, Quantum geometric bounds in spinful systems with trivial band topology (2025), arXiv:2501.16428.

This talk is part of the Theory of Condensed Matter series.

This talk is included in these lists:

• All Cavendish Laboratory Seminars
• All Talks (aka the CURE list)
• Centre for Health Leadership and Enterprise
• Combined TCM Seminars and TCM blackboard seminar listing
• Featured lists
• Lennard-Jones Centre external
• ME Seminar
• Meeting Room 3 in the RDC (third floor, close to the cafeteria)
• Meeting Room 3 in the RDC(third floor, close to the cafeteria)
• Neurons, Fake News, DNA and your iPhone: The Mathematics of Information
• PMRFPS's
• School of Physical Sciences
• Theory of Condensed Matter
• Thin Film Magnetic Talks
• few29

Note that ex-directory lists are not shown.