Berislav Buča
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View article: Opening Krylov Space to Access All-Time Dynamics via Dynamical Symmetries
Opening Krylov Space to Access All-Time Dynamics via Dynamical Symmetries Open
Solving short- and long-time dynamics of closed quantum many-body systems is one of the main challenges of both atomic and condensed matter physics. For locally interacting closed systems, the dynamics of local observables can always be ex…
View article: Protecting coherence from the environment via Stark many-body localization in a Quantum-Dot Simulator
Protecting coherence from the environment via Stark many-body localization in a Quantum-Dot Simulator Open
Semiconductor platforms are emerging as a promising architecture for storing and processing quantum information, e.g., in quantum dot spin qubits. However, charge noise coming from interactions between the electrons is a major limiting fac…
View article: Unified Theory of Local Quantum Many-Body Dynamics: Eigenoperator Thermalization Theorems
Unified Theory of Local Quantum Many-Body Dynamics: Eigenoperator Thermalization Theorems Open
Explaining quantum many-body dynamics is a long-held goal of physics. A rigorous operator algebraic theory of dynamics in locally interacting systems in any dimension is provided here in terms of time-dependent equilibrium (Gibbs) ensemble…
View article: Unified theory of local quantum many-body dynamics: Eigenoperator thermalization theorems
Unified theory of local quantum many-body dynamics: Eigenoperator thermalization theorems Open
Explaining quantum many-body dynamics is a long-held goal of physics. A rigorous operator algebraic theory of dynamics in locally interacting systems in any dimension is provided here in terms of time-dependent equilibrium (Gibbs) ensemble…
View article: Exact multistability and dissipative time crystals in interacting fermionic lattices
Exact multistability and dissipative time crystals in interacting fermionic lattices Open
The existence of multistability in quantum systems beyond the mean-field approximation remains an intensely debated open question. Quantum fluctuations are finite-size corrections to the mean-field as the full exact solution is unobtainabl…
View article: Time periodicity from randomness in quantum systems
Time periodicity from randomness in quantum systems Open
Many complex systems can spontaneously oscillate under non-periodic forcing.\nSuch self-oscillators are commonplace in biological and technological\nassemblies where temporal periodicity is needed, such as the beating of a human\nheart or …
View article: Tunable Non-equilibrium Phase Transitions between Spatial and Temporal Order through Dissipation
Tunable Non-equilibrium Phase Transitions between Spatial and Temporal Order through Dissipation Open
We propose an experiment with a driven quantum gas coupled to a dissipative optical cavity that realizes a novel kind of far-from-equilibrium phase transition between spatial and temporal order. The control parameter of the transition is t…
View article: Protecting coherence from the environment via Stark many-body localization in a Quantum-Dot Simulator
Protecting coherence from the environment via Stark many-body localization in a Quantum-Dot Simulator Open
Semiconductor platforms are emerging as a promising architecture for storing and processing quantum information, e.g., in quantum dot spin qubits. However, charge noise coming from interactions between the electrons is a major limiting fac…
View article: Algebraic theory of quantum synchronization and limit cycles under dissipation
Algebraic theory of quantum synchronization and limit cycles under dissipation Open
Synchronization is a phenomenon where interacting particles lock their motion and display non-trivial dynamics. Despite intense efforts studying synchronization in systems without clear classical limits, no comprehensive theory has been fo…
View article: Exact bistability and time pseudo-crystallization of driven-dissipative fermionic lattices
Exact bistability and time pseudo-crystallization of driven-dissipative fermionic lattices Open
The existence of bistability in quantum optical systems remains a intensely debated open question beyond the mean-field approximation. Quantum fluctuations are finite-size corrections to the mean-field approximation used because the full e…
View article: Report on 2103.01808v4
Report on 2103.01808v4 Open
Synchronization is a phenomenon where interacting particles lock their motion and display non-trivial dynamics.Despite intense efforts studying synchronization in systems without clear classical limits, no comprehensive theory has been fou…
View article: Report on 2103.01808v4
Report on 2103.01808v4 Open
Synchronization is a phenomenon where interacting particles lock their motion and display non-trivial dynamics.Despite intense efforts studying synchronization in systems without clear classical limits, no comprehensive theory has been fou…
View article: Dynamical l-bits in Stark many-body localization
Dynamical l-bits in Stark many-body localization Open
Stark many-body localized (SMBL) systems have been shown both numerically and experimentally to have Bloch many-body oscillations, quantum many-body scars, and fragmentation in the large field tilt limit. Likewise, they are believed to sho…
View article: Local Hilbert Space Fragmentation and Out-of-Time-Ordered Crystals
Local Hilbert Space Fragmentation and Out-of-Time-Ordered Crystals Open
Quantum many-body models with both Hilbert space fragmentation and non-stationarity have recently been identified. Hilbert space fragmentation does not immediately imply non-stationarity. However, strictly local dynamical symmetries direct…
View article: Rule 54: exactly solvable model of nonequilibrium statistical mechanics
Rule 54: exactly solvable model of nonequilibrium statistical mechanics Open
We review recent results on an exactly solvable model of nonequilibrium statistical mechanics, specifically the classical rule 54 reversible cellular automaton and some of its quantum extensions. We discuss the exact microscopic descriptio…
View article: Report on 2103.01808v2
Report on 2103.01808v2 Open
Synchronization is a phenomenon when interacting particles lock their motion into the same phase and frequency.Despite intense efforts studying synchronization in systems without clear classical limits, no comprehensive theory has been fou…
View article: Report on 2103.01808v2
Report on 2103.01808v2 Open
Synchronization is a phenomenon when interacting particles lock their motion into the same phase and frequency.Despite intense efforts studying synchronization in systems without clear classical limits, no comprehensive theory has been fou…
View article: Self-induced entanglement resonance in a disordered Bose-Fermi mixture
Self-induced entanglement resonance in a disordered Bose-Fermi mixture Open
Different regimes of entanglement growth under measurement have been demonstrated for quantum many-body systems, with an entangling phase for low measurement rates and a disentangling phase for high rates (quantum Zeno effect). Here we stu…
View article: Report on 2103.01808v2
Report on 2103.01808v2 Open
Synchronization is a phenomenon when interacting particles lock their motion into the same phase and frequency.Despite intense efforts studying synchronization in systems without clear classical limits, no comprehensive theory has been fou…
View article: Bethe ansatz approach for dissipation: exact solutions of quantum many-body dynamics under loss
Bethe ansatz approach for dissipation: exact solutions of quantum many-body dynamics under loss Open
We develop a Bethe ansatz based approach to study dissipative systems experiencing loss. The method allows us to exactly calculate the spectra of interacting, many-body Liouvillians. We discuss how the dissipative Bethe ansatz opens the po…
View article: Quantum many-body attractors
Quantum many-body attractors Open
Real-world complex systems often show robust, persistent oscillatory dynamics, e.g.~non-trivial attractors. On the quantum level this behaviour has only been found in semi-classical or weakly correlated systems under restrictive assumption…
View article: Quantum many-body attractors
Quantum many-body attractors Open
Complex dynamics when occurring autonomously, i.e. without external driving, is usually associated with everyday length scales and classical physics, e.g. living organisms. This dynamics is \emph{not} quantum coherent. Quantum coherent dyn…
View article: Non-stationarity and dissipative time crystals: spectral properties and finite-size effects
Non-stationarity and dissipative time crystals: spectral properties and finite-size effects Open
We discuss the emergence of non-stationarity in open quantum many-body systems. This leads us to the definition of dissipative time crystals which display experimentally observable, persistent, time-periodic oscillations induced by noisy c…
View article: Isolated Heisenberg magnet as a quantum time crystal
Isolated Heisenberg magnet as a quantum time crystal Open
We demonstrate analytically and numerically that the paradigmatic model of quantum magnetism, the Heisenberg XXZ spin chain, does not equilibrate. It constitutes an example of persistent nonstationarity in a quantum many-body system that d…
View article: Non-stationarity and Dissipative Time Crystals: Spectral Properties and\n Finite-Size Effects
Non-stationarity and Dissipative Time Crystals: Spectral Properties and\n Finite-Size Effects Open
We discuss the emergence of non-stationarity in open quantum many-body\nsystems. This leads us to the definition of dissipative time crystals which\ndisplay experimentally observable, persistent, time-periodic oscillations\ninduced by nois…
View article: Stationary state degeneracy of open quantum systems with non-abelian symmetries
Stationary state degeneracy of open quantum systems with non-abelian symmetries Open
We study the null space degeneracy of open quantum systems with multiple non-abelian, strong symmetries. By decomposing the Hilbert space representation of these symmetries into an irreducible representation involving the direct sum of mul…
View article: Dissipative Bethe Ansatz: Exact Solutions of Quantum Many-Body Dynamics\n Under Loss
Dissipative Bethe Ansatz: Exact Solutions of Quantum Many-Body Dynamics\n Under Loss Open
We use the Bethe Ansatz technique to study dissipative systems experiencing\nloss. The method allows us to exactly calculate the Liouvillian spectrum. This\nopens the possibility of analytically calculating the dynamics of a wide range\nof…
View article: Dissipative Bethe Ansatz: Exact Solutions of Quantum Many-Body Dynamics Under Loss
Dissipative Bethe Ansatz: Exact Solutions of Quantum Many-Body Dynamics Under Loss Open
We use the Bethe Ansatz technique to study dissipative systems experiencing loss. The method allows us to exactly calculate the Liouvillian spectrum. This opens the possibility of analytically calculating the dynamics of a wide range of ex…