Article
Physics, Fluids & Plasmas
Naftali R. Smith
Summary: This study investigates the large deviations in series of finite lengths generated by chaotic maps. The rate functions for the doubling, tent, and logistic maps are analytically obtained, while the rate function of the cat map is determined numerically, revealing strong evidence of a remarkable singularity. Furthermore, a numerical tool for simulating atypical realizations of sequences is developed.
Article
Physics, Multidisciplinary
Luke Causer, Mari Carmen Banuls, Juan P. Garrahan
Summary: Recent work has shown the effectiveness of tensor network methods in computing the statistics of dynamical observables at arbitrary finite time. This method allows for efficient and accurate calculations of finite time dynamical partition sums, as well as the generation of rare event trajectories on demand. The application of this method unveils dynamical phase diagrams.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Multidisciplinary
Maurizio Fagotti
Summary: We investigate the effect of a single spin flip preceding a global quench between translationally invariant local Hamiltonians in spin-1/2 chains. The effect of the localized perturbation does not fade away however large the distance from the perturbation is. In particular, translational invariance is not restored and the infinite-time limit depends on whether the spin was flipped or not. We argue that this phenomenon is more general than the particular example considered and we conjecture that it is triggered by topological properties, specifically, the existence of semilocal charges.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Multidisciplinary
Shouvik Datta, Bastien Lapierre, Per Moosavi, Apoorv Tiwari
Summary: We investigate the behavior of Tomonaga-Luttinger liquids under out-of-equilibrium conditions caused by marginal deformations. By altering the Luttinger parameter or the compactification radius of the free boson conformal field theory, either through quenching or periodic driving, we derive exact analytical results for the Loschmidt echo, particle and energy densities. We demonstrate the presence of revivals and temporal orthogonalities in the quench dynamics, as well as stability or instability in the time evolution of physical quantities under periodic driving. Furthermore, we compare the marginally deformed thermal density matrices using non-perturbative evaluation of their Renyi divergence as a Euclidean quench. The dynamics are found to strongly depend on the ratio of the Luttinger parameters, which corresponds to the Zamolodchikov distance in the space of marginal deformations. Our setup can also be interpreted as the dynamics of a bosonic string undergoing instantaneous changes in the target-space radius.
Article
Mechanics
Mamta Gautam, Nitesh Jaiswal, Ankit Gill, Tapobrata Sarkar
Summary: We study information theoretic quantities in models with three and four spin interactions, which show distinctive characteristics compared to their nearest neighbour counterparts. The Nielsen complexity (NC), Fubini-Study complexity (FSC), and entanglement entropy (EE) are quantified to measure these characteristics. The models have a rich phase structure, different from ones with nearest neighbour interactions, which results in different behavior of information theoretic quantities. For example, the derivative of NC does not diverge but shows a discontinuity near continuous phase transitions, and the FSC may be regular and continuous across such transitions. In addition, the EE exhibits novel discontinuity at first and second order quantum phase transitions.
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT
(2023)
Article
Astronomy & Astrophysics
Arthur G. Cavalcanti, Dmitry Melnikov
Summary: In this paper, we construct time-dependent solutions of three-dimensional gravity in anti-de Sitter space dual to systems with boundaries (BCFTs) following the AdS/BCFT prescription. Such solutions can be discussed in the context of first-order phase transition dynamics or quantum quenches. We find that the holographic entanglement entropy grows logarithmically with time with correct universal coefficient, but exhibits different behavior at late times in the bubble quench scenario.
Article
Materials Science, Multidisciplinary
Ravi Kumar, Ranjan Modak
Summary: This study investigates the effect of geometric quench in the Aubry-Andr?? model on the localization-delocalization transition. It is observed that geometric quench leads to a power-law growth of entanglement entropy in the delocalized phase, and saturation values in the many-body localized phase follow an area law instead of the usual volume law.
Article
Mechanics
Kuntal Pal, Kunal Pal, Ankit Gill, Tapobrata Sarkar
Summary: We study the circuit complexity of Nielsen in a periodic harmonic oscillator chain through single and multiple quenches. This system allows for analytical computations and provides insights into quantum information dynamics. For single quench scenarios, we identify important differences between our results using wavefunction and the recently proposed covariance matrix method, with significant consequences. In multiple quench scenarios, the complexity behaves differently compared to other information theoretic measures, such as entanglement entropy and out of time ordered correlator.
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT
(2023)
Article
Multidisciplinary Sciences
Benjamin Nagler, Sian Barbosa, Jennifer Koch, Giuliano Orso, Artur Widera
Summary: Relaxation of quantum systems is a central problem in nonequilibrium physics. Our study reveals that long-range phase coherence breaks down faster than the density response in disordered quantum systems, and the system takes longer to reestablish quantum coherence after the disorder is removed.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Mathematics
David Alonso-Gutierrez, Joscha Prochno, Christoph Thaele
Summary: This work explores the connection between the KLS conjecture and the deviations of random vectors, as well as the projections in a ball. The study shows that the rate function undergoes a phase transition under different conditions.
JOURNAL OF FUNCTIONAL ANALYSIS
(2021)
Article
Quantum Science & Technology
Adam Callison, Max Festenstein, Jie Chen, Laurentiu Nita, Viv Kendon, Nicholas Chancellor
Summary: This paper presents tools for analyzing quantum dynamics in the rapid-quench regime, including analyzing the energy expectation value of Hamiltonian elements and determining whether local dynamics will occur under rapid-quench processes. By developing these tools, the paper aims to improve the performance of quantum walks and provide efficient estimates for Hamiltonian parameters in practical quantum annealing applications.
Article
Mechanics
Vincenzo Alba, Bruno Bertini, Maurizio Fagotti, Lorenzo Piroli, Paola Ruggiero
Summary: This paper provides a pedagogical introduction to the generalized hydrodynamic approach in inhomogeneous quenches in integrable many-body quantum systems, focusing on applications to bipartitioning protocols and trap quenches. Exact results for time-dependent correlation functions and entanglement evolution are discussed, as well as the theory's range of applicability, open questions, and future directions.
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT
(2021)
Article
Physics, Multidisciplinary
Gianluca Lagnese, Federica Maria Surace, Marton Kormos, Pasquale Calabrese
Summary: We investigated the quantum quench dynamics of a Heisenberg-Ising spin ladder model and observed that the confinement caused by internal interactions has a significant impact on the correlation function's light cone structure, allowing for measurements of the velocities and masses of the mesons.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2022)
Article
Mechanics
Colin Rylands, Bruno Bertini, Pasquale Calabrese
Summary: We investigate the quench dynamics of the one-dimensional Hubbard model using the quench action formalism. We introduce a class of integrable initial states described as product states over two sites and provide an exact characterization of the late-time regime. Our solution allows us to access the stationary values of local observables and the asymptotic entanglement dynamics in the thermodynamic limit.
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT
(2022)
Article
Physics, Mathematical
Marco Lenci, Luc Rey-Bellet
Summary: In this paper, we study the properties of the Gibbs-KMS state for a system of quantum spins or an interacting Fermi gas on the lattice. We provide upper bounds for large deviations and discuss lower bounds. Our analysis covers general interactions and observables, considering both the high temperature regime and one-dimensional case.
JOURNAL OF STATISTICAL PHYSICS
(2023)
Article
Physics, Multidisciplinary
Michele Vodret, Alessio Chiocchetta, Andrea Gambassi
Summary: In this paper, we discuss the calculation of non-equilibrium universal amplitude ratios using the functional renormalization group approach and extend its applicability. Specifically, we focus on the critical relaxation of the Ising model with non-conserved dynamics (model A) and calculate the universal amplitude ratio associated with the fluctuation-dissipation ratio of the order parameter, considering a critical quench from a high-temperature initial condition. Our predictions are found to be in good agreement with previous perturbative renormalization-group calculations and Monte Carlo simulations.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2022)
Article
Physics, Multidisciplinary
G. Tucci, E. Roldan, A. Gambassi, R. Belousov, F. Berger, R. G. Alonso, A. J. Hudspeth
Summary: Modeling noisy oscillations of active systems is a challenge in physics and biology. A linear stochastic model driven by non-Markovian bistable noise is proposed and shown to generate self-sustained periodic oscillation. Experimental data on hair bundles in bullfrog sacculus support this minimal model accurately describing bistable-like oscillatory motion.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Multidisciplinary
Federico Balducci, Andrea Gambassi, Alessio Lerose, Antonello Scardicchio, Carlo Vanoni
Summary: This article investigates the nonequilibrium evolution of coexisting ferromagnetic domains in the two-dimensional quantum Ising model, demonstrating the use of a holographic mapping to study the quantum-fluctuating interface and the emergence of robust ergodicity breaking in two dimensions due to a symmetry-breaking longitudinal field.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Multidisciplinary
Urna Basu, Vincent Demery, Andrea Gambassi
Summary: This study proposes a new approach in which the medium is modeled as a Gaussian field linearly coupled to the colloid, resulting in an effective evolution equation of the colloidal particle featuring a non-linear memory term. This non-linear term explains the experimental and numerical evidence in the presence of optical confinement.
Article
Physics, Multidisciplinary
Falko Schmidt, Agnese Callegari, Abdallah Daddi-Moussa-Ider, Battulga Munkhbat, Ruggero Verre, Timur Shegai, Mikael Kaell, Hartmut Loewen, Andrea Gambassi, Giovanni Volpe
Summary: Researchers have demonstrated the tunable repulsive critical Casimir forces, which are important for the development of micro- and nanodevices. The stiction between parts in micro- and nanodevices, caused by attractive Casimir-Lifshitz forces, has been successfully counteracted by the repulsive critical Casimir forces. This breakthrough provides active control and precise tunability in the forces acting between the constituent parts.
Article
Physics, Multidisciplinary
Pietro Luigi Muzzeddu, Edgar Roldan, Andrea Gambassi, Abhinav Sharma
Summary: The capacity of constituting entities to perform directed motion is crucial for many properties of biological active matter. In this study, the behavior of a self-propelled particle carrying a passive cargo in a travelling activity wave is investigated. The results show that the active-passive dimer displays rich tactic behavior controlled by the ratio between cargo and microswimmer frictions, which has potential implications for the design of bio-hybrid microswimmers.
Article
Physics, Multidisciplinary
Gennaro Tucci, Stefano De Nicola, Sascha Wald, Andrea Gambassi
Summary: Recent experimental advances have inspired the development of theoretical tools to describe the non-equilibrium dynamics of quantum systems. Among them, an exact representation of quantum spin systems in terms of classical stochastic processes has been proposed. In this study, we extend this stochastic approach to bosonic systems by considering the one-dimensional quantum quartic oscillator. We demonstrate how to parameterize the time evolution of this model using classical variables and propose a novel way to numerically simulate the system's time evolution by interpreting these variables as stochastic processes. Our findings are benchmarked against analytically solvable limits and alternative derivations of known results are provided.
SCIPOST PHYSICS CORE
(2023)
Article
Materials Science, Multidisciplinary
Federico Balducci, Andrea Gambassi, Alessio Lerose, Antonello Scardicchio, Carlo Vanoni
Summary: In a recent paper, the authors demonstrate a robust form of ergodicity breaking in the dynamics of interfaces in the symmetry-broken phase of the two-dimensional ferromagnetic quantum Ising model. They discuss two classes of initial states on the square lattice and provide a detailed analysis of the evolution of these interfaces. The authors also present evidence supporting the persistence of nonergodicity and highlight the presence of a timescale for the decay of a region of large linear size.
Article
Physics, Fluids & Plasmas
Davide Venturelli, Andrea Gambassi
Summary: We investigate the nonequilibrium dynamics of two particles coupled to a thermally fluctuating scalar field and confined in separate harmonic potentials. When one of these particles is subjected to an external periodic driving, their motion synchronizes due to the field-mediated effective interaction, leading to a nonequilibrium periodic state. We analyze the nonlinear response of the second particle as a function of the driving frequency, particularly far from the adiabatic regime, and compare the perturbative, analytic solution to its adiabatic approximation, validating our predictions through numerical simulations.
Article
Physics, Fluids & Plasmas
Gennaro Tucci, Andrea Gambassi, Satya N. Majumdar, Gregory Schehr
Summary: This study investigates the statistical properties of a single run-and-tumble particle (RTP) reaching a fixed target, with or without resetting, in one spatial dimension. By analyzing the first-passage time distribution of a free RTP and introducing resetting, the research reveals interesting singular behaviors and rich phase diagrams in the (b, v) plane, providing important insights into the behavior of RTP under different conditions.
Article
Physics, Fluids & Plasmas
Davide Venturelli, Francesco Ferraro, Andrea Gambassi
Summary: We investigated the nonequilibrium relaxational dynamics of a probe particle linearly coupled to a thermally fluctuating scalar field and subject to a harmonic potential. Our study provides insights into the behavior of optically trapped colloids immersed in fluid close to its bulk critical point. Both analytical and numerical approaches were used to explore the system, confirming the theoretical predictions and determining the universal exponents.
Article
Optics
Mark T. Mitchison, Archak Purkayastha, Marlon Brenes, Alessandro Silva, John Goold
Summary: This study proposes a scheme to measure the temperature of pure states through quantum interference, showing that even individual pure quantum states can have temperatures in completely isolated quantum systems.
Article
Physics, Fluids & Plasmas
Markus Gross, Andrea Gambassi, S. Dietrich
Summary: This study investigates the static and dynamic correlations of the critical Casimir force in different film geometries and finds that the dynamic correlation function of the CCF is independent of the momentum cutoff and decays algebraically in time. Additionally, the thickness of a fluid film can fluctuate under the influence of the time-dependent CCF, leading to a distinct contribution to the position variance in the equation of motion of the film boundary.
Article
Materials Science, Multidisciplinary
Muath Natsheh, Andrea Gambassi, Aditi Mitra
Summary: In the periodically driven O(N) model, the critical properties of forming the Floquet time crystal in the prethermal phase are investigated. Key exponents such as v, beta, and theta are determined using a combination of dimensional expansion and exact solutions for large N, showing that these exponents remain the same as those in the absence of drive. The spatial structure of two-point correlation functions near the critical line exhibits longer algebraic decays compared to the absence of a drive, with period doubling and oscillations at a specific wave vector.
Article
Physics, Multidisciplinary
Saeed Mahdisoltani, Riccardo Ben Ali Zinati, Charlie Duclut, Andrea Gambassi, Ramin Golestanian
Summary: The study presents an unconventional mechanism for interactions within biological systems, proposing that self-organization is driven by the interaction of polarity particles via chemical signals. The research utilizes an exact stochastic formulation and dynamical renormalization group analysis to reveal the emergent Galilean symmetry and dynamical scaling exponents at the critical point. These findings indicate superdiffusive density fluctuations and non-Poissonian number fluctuations that can determine the large-scale behavior of cell colonies and tissues.
PHYSICAL REVIEW RESEARCH
(2021)
