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On the Maldacena-Shenker-Stanford chaos bound in black hole spacetimes: Saturation, apparent violations, and their geometric origin
Terkaa Victor Targema, Kazuharu Bamba, Usman Zafar
Reported violations of the Maldacena-Shenker-Stanford (MSS) chaos bound in black hole spacetimes raise the question of whether they reflect a genuine breakdown, a feature of partic…
Physical constraints on the Maldacena-Shenker-Stanford chaos-bound in black hole spacetimes
Terkaa Victor Targema, Kazuharu Bamba, Riasat Ali +1
Chaotic motion near black holes has recently been examined through the lens of the Maldacena-Shenker-Stanford (MSS) chaos-bound, but reported violations remain contradictory. A sig…
Thermodynamic and observational implications of black holes in toroidal geometry
Usman Zafar, Kazuharu Bamba, Abdul Jawad +2
We investigate the thermodynamic and observational implications for the charged torus-like black holes, a class of solutions distinct from the classical Schwarzschild black holes.…
Thermodynamic analysis of black holes with cloud of strings and quintessence via Barrow entropy
Usman Zafar, Kazuharu Bamba, Tabinda Rasheed +1
We explore a Reissner-Nordström Anti-de Sitter (RN-AdS) black hole with a cloud of string and quintessence to study thermodynamics and thermodynamic topology in the presence of Bar…
Inflationary universe from anomaly-free -gravity
Aroonkumar Beesham, Kazuharu Bamba
By adding a three dimensional manifold to an eleven dimensional manifold in supergravity, we obtain the action of -gravity and find that it is anomaly free. We calculate the…
Nambu Dynamics and Hydrodynamics of Granular Material
Akio Sugamoto, Kazuharu Bamba, Tetuya Kawamura +3
On the basis of the intimate relation between Nambu dynamics and the hydrodynamics, the hydrodynamics on a non-commutative space (obtained by the quantization of space), proposed b…