[phys4phys] Strings, Holography & Chaos Seminar July 02 2025 12:00 CEST: Jovan Odavić

[Mihailo Čubrović]

Dear friends,

On July 02 (Wednesday) at 12:00 CEST we will have a Zoom seminar on 
quantum magic and quantum chaos, by Jovan Odavić. Title, abstract and 
Zoom coordinates follow.

Jovan Odavić
Universita degli Studi di Napoli Federico II, Napoli, Italy

Quantum Chaos, Non-Stabilizerness, and the Sachdev-Ye-Kitaev Model

Understanding quantum chaos in many-body systems is crucial to a variety 
of scientific fields. In statistical physics, the onset of quantum chaos 
is closely tied to the mechanisms of thermalization. In high-energy 
physics, chaos and information scrambling play a fundamental role in 
understanding black hole dynamics. Interestingly, quantum chaos is also 
relevant to the concept of quantum advantage, i.e. the provable speed-up 
of algorithms run on quantum hardware. The ability to harness ergodicity 
and with it, quantum chaos, lies at the core of quantum computing’s 
transformative potential.

In this talk, I will introduce the concept of non-stabilizerness, also 
known colloquially as "magic", and discuss its roots in quantum 
information science. Magic, like entanglement, is a purely quantum 
resource and plays a crucial role in enabling universal quantum 
computation. I will also present our recent results (arXiv:2502.03093), 
where we explored the interplay between entanglement and magic in the 
Sachdev-Ye-Kitaev (SYK) model – a paradigmatic disordered quantum system 
with deep connections to the low-dimensional description of black holes.

Additionally, I will present new results (arXiv:2505.05199) on the 
spectral form factor (SFF), a key diagnostic for identifying the onset 
of quantum chaos in many-body quantum systems. Our analysis exploits a 
mathematical correspondence between the SFF and random planar walks, 
offering a novel perspective on its behavior. I will highlight the 
utility of our recently derived closed-form expression for the plateau 
(long-time) regime of the SFF in the Sachdev-Ye-Kitaev (SYK) model at 
various temperatures.


Topic: Strings, Holography & Chaos Seminar
Time: Jul 2, 2025 11:45 AM Europe/Belgrade
Join Zoom Meeting
https://zoom.us/j/96430745641?pwd=ybBmZ3AFtiQKL8TIDrhJGq7dg1taUU.1

Meeting ID: 964 3074 5641
Passcode: 285476


Note that the topic is rather broad, and could be of interest to people 
in condensed matter, quantum mechanics and quantum technologies in 
addition to string theorists. Hope to see many of you!


-- 
Dr. Mihailo Čubrović

Center for the Study of Complex Systems
Institute of Physics Belgrade
National Institute of the Republic of Serbia
Pregrevica 118, 11080 Belgrade, Serbia
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