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[Fizinfo] Tuesday 14:15 - Daniel Varjas on exceptional dynamics in spin liquids

From: Andras Palyi <palyi.andras AT ttk.bme.hu>
To: FIZINFO AT lists.kfki.hu, exotic-quantum-phases-seminar AT googlegroups.com, kvantuminfo AT lists.kfki.hu
Subject: [Fizinfo] Tuesday 14:15 - Daniel Varjas on exceptional dynamics in spin liquids
Date: Fri, 4 Mar 2022 06:45:00 +0100
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Dear Colleagues,

Next Tuesday at 14:15, the BME Exotic Quantum Phases seminar continues with
this talk:

Dániel Varjas (Stockholm)
Exceptional dynamics of interacting spin liquids

online in Teams
Time: Mar 8, Tuesday 14:15
Reference: Kang Yang, Daniel Varjas, Emil J. Bergholtz, Sid Morampudi, Frank
Wilczek
Exceptional dynamics of interacting spin liquids
https://arxiv.org/abs/2202.03445

Teams link:
https://teams.microsoft.com/l/meetup-join/19%3ae5b4bc3bfad5455ab5bd3f05b8919933%40thread.tacv2/1646372472723?context=%7b%22Tid%22%3a%226a3548ab-7570-4271-91a8-58da00697029%22%2c%22Oid%22%3a%22f8b27e90-dbca-4bb5-813c-d6415577ec35%22%7d

Best regards,
Andras Palyi

= = =

Abstract:

Kang Yang, Daniel Varjas, Emil J. Bergholtz, Sid Morampudi, Frank Wilczek
Exceptional dynamics of interacting spin liquids
https://arxiv.org/abs/2202.03445

We show that interactions in quantum spin liquids can result in non-Hermitian
phenomenology that differs qualitatively from mean-field expectations. We
demonstrate this in two prominent cases through the effects of phonons and
disorder on a Kitaev honeycomb model. Using analytic and numerical
calculations, we show the generic appearance of exceptional points and rings
depending on the symmetry of the system. Their existence is reflected in
dynamical observables including the dynamic structure function measured in
neutron scattering. The results point to new phenomenological features in
realizable spin liquids that must be incorporated into the analysis of
experimental data.

[Fizinfo] Tuesday 14:15 - Daniel Varjas on exceptional dynamics in spin liquids, Andras Palyi, 03/04/2022