175 citations · 1.5k across the 35 of their papers we have counts for
36 papers
From Lyapunov Growth to Weak Quantum Chaos
Sašo Grozdanov, Tomaž Prosen
Local out-of-time-order correlators (OTOCs) measure the growth of initially small commutators. For bounded local operators, this growth ends when the local commutator becomes of or…
Quasinormal modes as exterior probes of black hole interiors in our Universe
Sašo Grozdanov, Vita Movrin, Samuel Valach
We consider a scenario in which a black hole is enclosed in a reflecting timelike cavity and linearly perturbed. For the resulting quasinormal spectra of gravitational, electromagn…
Bouncing Geodesics, Singularities, and the Cavity Thermal Product Formula in Asymptotically Flat and de Sitter Black Holes
Sašo Grozdanov, Vita Movrin, Samuel Valach
We investigate the existence and implications of ``bouncing geodesics'' in asymptotically flat Schwarzschild and Schwarzschild--de Sitter black holes. These trajectories, which pro…
Bouncing geodesics, black hole singularities, and singularities of thermal correlators
Sašo Grozdanov, Samuel Valach, Mile Vrbica
Bouncing geodesics have been used as valuable probes of black hole singularities. In the dual boundary theory, the presence of bouncing geodesics is encoded in the analytic structu…
Thermal field theory correlators in the large- limit and the spectral duality relation
Sašo Grozdanov, Mile Vrbica
In Ref.~\cite{Grozdanov:2024wgo}, we derived a spectral duality relation applicable to the spectra of 3 conformal field theories (CFTs) and their holographically dual 4 black…
Ergodic behaviors in reversible 3-state cellular automata
Rustem Sharipov, Matija Koterle, Sašo Grozdanov +1
Classical cellular automata represent a class of explicit discrete spacetime lattice models in which complex large-scale phenomena emerge from simple deterministic rules. With the…
Wilsonian renormalisation group and thermal field theory in the Schwinger-Keldysh closed-time-path formalism
Giorgio Frangi, Sašo Grozdanov
We study perturbative Wilsonian renormalisation group (RG) for the scalar theory at finite temperature to one loop order in the Schwinger-Keldysh closed-time-path (CTP) forma…
Effective field theories of dissipative fluids with one-form symmetries
Shreya Vardhan, Sašo Grozdanov, Samuel Leutheusser +1
A system with a one-form global symmetry at finite temperature can be viewed as a dissipative fluid of string-like objects. In this work, we classify and construct the most general…
Analytic structure of diffusive correlation functions
Sašo Grozdanov, Timotej Lemut, Jaka Pelaič +1
Diffusion is a dissipative transport phenomenon ubiquitously present in nature. Its details can now be analysed with modern effective field theory (EFT) techniques that use the clo…
Duality Constraints on Thermal Spectra of 3d Conformal Field Theories and 4d Quasinormal Modes
Sašo Grozdanov, Mile Vrbica
Thermal spectra of correlation functions in holographic 3d large-N conformal field theories (CFTs) correspond to quasinormal modes of classical gravity and other fields in asymptot…
Quantum origin of Ohm's reciprocity relation and its violation: conductivity as inverse resistivity
Giorgio Frangi, Sašo Grozdanov
Conventional wisdom teaches us that the electrical conductivity in a material is the inverse of its resistivity. In this work, we show that when both of these transport coefficient…
Spectra of correlators in the relaxation time approximation of kinetic theory
Matej Bajec, Sašo Grozdanov, Alexander Soloviev
The relaxation time approximation (RTA) of the kinetic Boltzmann equation is likely the simplest window into the microscopic properties of collective real-time transport. Within th…
Pole-skipping of gravitational waves in the backgrounds of four-dimensional massive black holes
Sašo Grozdanov, Mile Vrbica
Pole-skipping is a property of gravitational waves dictated by their behaviour at horizons of black holes. It stems from the inability to unambiguously impose ingoing boundary cond…
Reconstruction of spectra and an algorithm based on the theorems of Darboux and Puiseux
Sašo Grozdanov, Timotej Lemut
Assuming only a known dispersion relation of a single mode in the spectrum of a meromorphic two-point function (in the complex frequency plane at fixed wavevector) in some quantum…
Strong-field magnetohydrodynamics for neutron stars
Shreya Vardhan, Sašo Grozdanov, Samuel Leutheusser +1
We present a formulation of magnetohydrodynamics which can be used to describe the evolution of strong magnetic fields in neutron star interiors. Our approach is based on viewing m…
Aspects of univalence in holographic axion models
Matteo Baggioli, Sebastian Grieninger, Sašo Grozdanov +1
Univalent functions are complex, analytic (holomorphic) and injective functions that have been widely discussed in complex analysis. It was recently proposed that the stringent con…
Hydrodynamic dispersion relations at finite coupling
Sašo Grozdanov, Andrei O. Starinets, Petar Tadić
By using holographic methods, the radii of convergence of the hydrodynamic shear and sound dispersion relations were previously computed in the supersymmetric Yang-M…
Bounds on transport from univalence and pole-skipping
Sašo Grozdanov
Bounds on transport represent a way of understanding allowable regimes of quantum and classical dynamics. Numerous such bounds have been proposed, either for classes of theories or…
Coupling Constant Corrections in a Holographic Model of Heavy Ion Collisions with Nonzero Baryon Number Density
Åsmund Folkestad, Sašo Grozdanov, Krishna Rajagopal +1
Sufficiently energetic collisions of heavy ions result in the formation of a droplet of a strongly coupled liquid state of QCD matter known as quark-gluon plasma. By using gauge-gr…
The complex life of hydrodynamic modes
Sašo Grozdanov, Pavel K. Kovtun, Andrei O. Starinets +1
We study analytic properties of the dispersion relations in classical hydrodynamics by treating them as Puiseux series in complex momentum. The radii of convergence of the series a…
On the convergence of the gradient expansion in hydrodynamics
Sašo Grozdanov, Pavel K. Kovtun, Andrei O. Starinets +1
Hydrodynamic excitations corresponding to sound and shear modes in fluids are characterised by gapless dispersion relations. In the hydrodynamic gradient expansion, their frequenci…
Adding new branches to the "Christmas tree" of the quasinormal spectrum of black branes
Sašo Grozdanov, Andrei O. Starinets
In holography, quasinormal spectra of black branes coincide with the poles of retarded finite-temperature correlation functions of a dual quantum field theory in the limit of infin…
On the connection between hydrodynamics and quantum chaos in holographic theories with stringy corrections
Sašo Grozdanov
Pole-skipping is a recently discovered signature of many-body quantum chaos in collective energy dynamics. It establishes a precise connection between resummed, all-order hydrodyna…
Many-body chaos and energy dynamics in holography
Mike Blake, Richard A. Davison, Sašo Grozdanov +1
Recent developments have indicated that in addition to out-of-time ordered correlation functions (OTOCs), quantum chaos also has a sharp manifestation in the thermal energy density…