Uploaded January 2024 | Updated September 2026, 2 weeks ago
Dr. Gagnon’s second talk, entitled ‘The tragic destiny of Mileva Marić Einstein’, took place Monday, 29th January DIAS HQ, Burlington Road. Examining the biography of Mileva Marić Einstein, love letters between Mileva and Albert along with publications about her life and work, Dr Gagnon revealed the life and work of this forgotten physicist.
Dr. Gagnon’s second talk, entitled ‘The tragic destiny of Mileva Marić Einstein’, took place Monday, 29th January DIAS HQ, Burlington Road. Examining the biography of Mileva Marić Einstein, love letters between Mileva and Albert along with publications about her life and work, Dr Gagnon revealed the life and work of this forgotten physicist.




![DIAS 85 - STP Workshop - Matrix Membranes and Emergent Spacetime - Day 2
[2025-06-17]
(00:00:00) Simon Catterall - Sneaking up on lattice chiral fermions
(00:56:04) Masanori Hanada - From Banks-Fischler-Shenker-Susskind to Kogut-Susskind: Exponentially Accelerating Quantum Simulations
(01:56:43) David Berenstein - Staggered bosons and supersymmetry
(missing) Antal Jevicki - Finite N and BH Microstates
(02:55:44) Veselin Filev - Holographic probe branes and artificial neural networks DIAS 85 - STP Workshop - Matrix Membranes and Emergent Spacetime - Day 2](https://i.ytimg.com/vi/dTkX9P3BKt0/mqdefault.jpg)




![Multigap Topological Insulators: Non-Abelian Bands, Riemannian Geometry, Quantised Optical Responses
Speaker: Wojciech Jankowski (University of Cambridge)
Abstract: Multigap topological insulators, which fall beyond the conventional classifications of K-theory [1], are of vivid theoretical and experimental interest in condensed matter physics [2,3]. In this seminar, I will first introduce the homotopy classification of multigap topological phases with bulk topological invariants defined under PT (spacetime inversion) symmetry [3]. I will then cohomologically characterise non-Abelian bands of such phases, focusing on recently identified non-Abelian Hopf insulators with invariants underpinned by quaternion algebras [4]. Furthermore, I will discuss the momentum-space Riemannian geometry of quantum states realised by the multigap Bloch bundles, which I will connect to their physical manifestations in optical responses [5]. Finally, as quantised responses constitute a hallmark of topological phases of matter, I will show that three-dimensional multigap topological insulators can host quantised integrated non-linear shift photoconductivities [6]. I will demonstrate how the quantisation emerges from the momentum-space torsion tensors, connecting these to real Chern-Simons forms, and to virtual multiband optical transition amplitudes. Multigap Topological Insulators: Non-Abelian Bands, Riemannian Geometry, Quantised Optical Responses](https://i.ytimg.com/vi/h6-GiN_beZs/mqdefault.jpg)
