Probing Quantum Chaos in TTbar-Deformed Holography

Speaker:Debarshi Basu (Southeast University)

Time: 2025 Jun 16 14:00

Location: R710,SIMIS
Zoom meeting id: 838 524 0106 (Passcode: SIMIS)

Abstract:
In this talk, I will discuss how TTbar-deformations impact quantum chaos in holographic systems, focusing on deformed BTZ black holes. By studying shockwave geometries and computing out-of-time-ordered correlators (OTOCs), I will show that the Lyapunov exponent continues to saturate the MSS bound, but the butterfly velocity can violate the Mezei-Stanford bound when the deformation parameter is negative. To support these findings, we compare results across three independent probes: shockwave analysis, pole-skipping, and the entanglement wedge method. I’ll also briefly touch on the rotating case, where angular momentum leads to richer structure. These results shed light on how irrelevant deformations alter the dynamics of quantum information in holography.

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About Speaker:
Debarshi Basu is a Postdoctoral Researcher at the Shing-Tung Yau Center and School of Physics, Southeast University, Nanjing, China. He obtained his PhD from the Indian Institute of Technology (IIT) Kanpur, India. His research interests lie at the intersection of holography and quantum gravity, including holographic quantum information, the island formula and the black hole information loss paradox, quantum chaos and irrelevant deformations.