[hep-th] Reminder Strings, Holography & Chaos Seminar July 02 2025 12:00 CEST: Jovan Odavić

[Mihailo Čubrović]

Dear all,

A reminder to those interested: seminar today at noon sharp!


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


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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