Room: 
Reservation Date/Time: 
Repeats every week every Wednesday 10 times.
Wednesday, October 12, 2022 - 16:00 to 17:30
Wednesday, October 19, 2022 - 16:00 to 17:30
Wednesday, October 26, 2022 - 16:00 to 17:30
Wednesday, November 2, 2022 - 16:00 to 17:30
Wednesday, November 9, 2022 - 16:00 to 17:30
Wednesday, November 16, 2022 - 16:00 to 17:30
Wednesday, November 23, 2022 - 16:00 to 17:30
Wednesday, November 30, 2022 - 16:00 to 17:30
Wednesday, December 7, 2022 - 16:00 to 17:30
Wednesday, December 14, 2022 - 16:00 to 17:30
Room Use and Estimated Number of Participants: 

SSO Seminar, External Speaker.

Title: Coupling time-reversed systems: PT symmetry in quantum and classical domains

Abstract: Over the past decade, open systems undergoing coherent, non-unitary evolution have attracted tremendous attention. In the quantum case, it is due to non-Hermitian Hamiltonians that generate novel dynamics from exceptional-point (EP) degeneracies of their complex energies. In classical wave systems with PT-symmetric Hamiltonians, it is due to novel effects that includes enhanced sensitivity, topological transfer, and breakdown of bulk-boundary correspondence. I will present an overview of "non-Hermitian Physics" that covers quantum and classical realizations. I will show how their key surprising properties can be investigated using superconducting qubit [1], ultra cold atoms [2], quantum photonics [3], as well as electrical circuits, lasers, and shallow-water waves [4]. Going beyond the linear regime, each realization allows us to address non-trivial physics arising from interactions, memory, time-delay, or non-linearities. I will conclude the talk with open areas where these ideas may break new ground, and the unique role played by young students in this field of research.

[1] Nature Physics 15, 1232 (2019) with Kater Murch group.
[2] Nature Communications 10, 855 (2019) with Le Luo group.
[3] Phys. Rev. Research 4, 013061 (2022); Nature 557, 660 (2018) with Anthony Laing group.
[4] with Roberto Leon Montiel group, Gautam Vemuri group, and Monica Garcia Nuestes group.

Name of Requestor: 
Graham