135 citations · 535 across the 31 of their papers we have counts for
32 papers
Extended Hubbard model on fractals: d-Wave superconductivity and competing pairing channels
Robert Canyellas, Mikhail I. Katsnelson, Andrey Bagrov
Fractal structures such as the Sierpiński gasket have been predicted to enhance the critical temperature of s-wave superconductivity compared to regular crystals while maintaining…
Superconductivity in hyperbolic spaces: Regular hyperbolic lattices and Ginzburg-Landau theory
Vladimir Bashmakov, Askar Iliasov, Tomáš Bzdušek +1
We study -wave superconductivity in hyperbolic spaces using the Bogoliubov-de Gennes theory for discrete hyperbolic lattices and the Ginzburg-Landau theory for the continuous hy…
Learning complexity of many-body quantum sign structures through the lens of Boolean Fourier analysis
Ilya Schurov, Anna Kravchenko, Mikhail I. Katsnelson +2
We study sign structures of the ground states of spin- magnetic systems using the methods of Boolean Fourier analysis. Previously it was shown that the sign structures of frus…
Fröhlich versus Bose-Einstein Condensation in Pumped Bosonic Systems
Wenhao Xu, Andrey A. Bagrov, Farhan T. Chowdhury +4
Magnon-condensation, which emerges in pumped bosonic systems at room temperature, continues to garner great interest for its long-lived coherence. While traditionally formulated in…
Emergence of non-ergodic multifractal quantum states in geometrical fractals
Fabio Salvati, Mikhail I. Katsnelson, Andrey A. Bagrov
Eigenstate multifractality, a hallmark of non-interacting disordered metals, which may also be observed in many-body localized states, is characterized by anomalous slow dynamics a…
Multi-scale structural complexity as a quantitative measure of visual complexity
Anna Kravchenko, Andrey A. Bagrov, Mikhail I. Katsnelson +1
While intuitive for humans, the concept of visual complexity is hard to define and quantify formally. We suggest adopting the multi-scale structural complexity (MSSC) measure, an a…
Strong enhancement of superconductivity on finitely ramified fractal lattices
Askar A. Iliasov, Robert Canyellas, Mikhail I. Katsnelson +1
Using the Sierpinski gasket (triangle) and carpet (square) lattices as examples, we theoretically study the properties of fractal superconductors. For that, we focus on the phenome…
Local quenches in fracton field theory: Lieb-Robinson bound, non-causal dynamics and fractal excitation patterns
Dmitry S. Ageev, Andrey A. Bagrov, Aleksandr I. Belokon +3
We study the out-of-equilibrium dynamics induced by a local perturbation in fracton field theory. For the and -symmetric free fractonic theories, we…
Stability of a quantum skyrmion: projective measurements and the quantum Zeno effect
Fabio Salvati, Mikhail I. Katsnelson, Andrey A. Bagrov +1
Magnetic skyrmions are vortex-like quasiparticles characterized by long lifetime and remarkable topological properties. That makes them a promising candidate for the role of inform…
Tunable phonon-driven magnon-magnon entanglement at room temperature
Yuefei Liu, Andrey Bagrov, Anders Bergman +7
We report the existence of entangled steady-states in bipartite quantum magnonic systems at elevated temperatures. We consider dissipative dynamics of two magnon modes in a biparti…
Many-body quantum sign structures as non-glassy Ising models
Tom Westerhout, Mikhail I. Katsnelson, Andrey A. Bagrov
The non-trivial phase structure of the eigenstates of many-body quantum systems severely limits the applicability of quantum Monte Carlo, variational, and machine learning methods.…
Thermally-induced magnetic order from glassiness in elemental neodymium
Benjamin Verlhac, Lorena Niggli, Anders Bergman +8
Temperature in thermodynamics is synonymous with disorder, and responsible for ultimately destroying ordered phases. Here, we show an unusual magnetic transition where, with increa…
Certification of quantum states with hidden structure of their bitstrings
O. M. Sotnikov, I. A. Iakovlev, A. A. Iliasov +3
The rapid development of quantum computing technologies already made it possible to manipulate a collective state of several dozen of qubits. This success poses a strong demand on…
Kinetic samplers for neural quantum states
Andrey A. Bagrov, Askar A. Iliasov, Tom Westerhout
Neural quantum states (NQS) are a novel class of variational many-body wave functions that are very flexible in approximating diverse quantum states. Optimization of an NQS ansatz…
Deterministic chaos and fractal entropy scaling in Floquet CFT
Dmitry S. Ageev, Andrey A. Bagrov, Askar A. Iliasov
In this paper, we study 2d Floquet conformal field theory, where the external periodic driving is described by iterated logistic or tent maps. These maps are known to be typical ex…
Coleman-Weinberg potential in -adic field theory
Dmitry S. Ageev, Andrey A. Bagrov, Askar A. Iliasov
In this paper, we study scalar field theory defined on the unramified extension of p-adic numbers . For different ``space-time'' dimensions , we comput…
Multi-scale structural complexity of natural patterns
Andrey A. Bagrov, Ilia A. Iakovlev, Askar A. Iliasov +2
Complexity of patterns is a key information for human brain to differ objects of about the same size and shape. Like other innate human senses, the complexity perception cannot be…
Anisotropic destruction of the Fermi surface in inhomogeneous holographic lattices
Askar Iliasov, Andrey A. Bagrov, Mikhail I. Katsnelson +1
We analyze fermionic response of strongly correlated holographic matter in presence of inhomogeneous periodically modulated potential mimicking the crystal lattice. The modulation…
Neural Quantum States of frustrated magnets: generalization and sign structure
Tom Westerhout, Nikita Astrakhantsev, Konstantin S. Tikhonov +2
Neural quantum states (NQS) attract a lot of attention due to their potential to serve as a very expressive variational ansatz for quantum many-body systems. Here we study the main…
Detecting quantum critical points in the Fermi-Hubbard model via complex network theory
Andrey A. Bagrov, Mikhail Danilov, Sergey Brener +3
A considerable success in phenomenological description of high-T superconductors has been achieved within the paradigm of Quantum Critical Point (QCP) - a parental state…
Suppressing backscattering of helical edge modes with a spin bath
Andrey A. Bagrov, Francisco Guinea, Mikhail I. Katsnelson
In this paper, we address the question of stability of protected chiral modes (e.g., helical edge states at the boundary of two-dimensional topological insulators) upon interaction…
Holographic pump probe spectroscopy
A. Bagrov, B. Craps, F. Galli +3
We study the non-linear response of a 2+1 dimensional holographic model with weak momentum relaxation and finite charge density to an oscillatory electric field pump pulse. Followi…
Holography and thermalization in optical pump-probe spectroscopy
A. Bagrov, B. Craps, F. Galli +3
Using holography, we model experiments in which a 2+1D strange metal is pumped by a laser pulse into a highly excited state, after which the time evolution of the optical conductiv…
Fractional quantum Hall effect in strained graphene: stability of Laughlin states in disordered (pseudo)magnetic fields
Andrey A. Bagrov, Alessandro Principi, Mikhail I. Katsnelson
We address the question of the stability of the (fractional) quantum Hall effect (QHE) in presence of pseudomagnetic disorder generated by mechanical deformations of a graphene she…