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Physics and Astronomy

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Statistical and Nonlinear Physics

Statistical and Nonlinear Physics

Complex systems and statistical physics, including chaos theory, complex networks, soft matter physics, biophysics, and emergent phenomena in many-body systems

7 papers in this specialization

Paperzilla Papers in Statistical and Nonlinear Physics

Constructive interference at the edge of quantum ergodic dynamics

This research employed a 103-qubit superconducting quantum processor to explore quantum dynamics using out-of-time-order correlators (OTOCs). OTOCs showed a remarkable sensitivity to the underlying dynamics of the system, especially when time-reversal protocols were implemented. This sensitivity, combined with the high classical simulation complexity of some OTOC measurements, suggests a path towards demonstrating a practical quantum advantage for learning about quantum systems.

Aug 22, 07:29 AM

Modeling Language Evolution Using a Spin Glass Approach

This paper presents a computational model suggesting that random interactions between syntactic parameters, combined with pre-existing grammatical constraints, may explain why languages both slowly change and diversify over time. The model, inspired by the physics of spin glasses, shows that under certain conditions, syntactic systems can become 'stuck' in metastable states, leading to both persistence and diversification of grammars.

Aug 18, 09:53 AM

Kinetic turbulence drives MHD equilibrium change via 3D reconnection

This experimental study demonstrates how magnetic turbulence can drive the merging of magnetic flux ropes, leading to changes in overall magnetic structure, a phenomenon observed in solar flares. Researchers triggered turbulence by launching electron beams along magnetic field lines within two separate flux ropes in a lab setting. The resulting merger was confirmed using fast camera images and measurements of magnetic field, ion temperature, ion velocity, and soft X-rays, with additional support from 3D particle-in-cell simulations.

Aug 12, 06:10 AM

Interpretation of generalized Langevin equations

This paper introduces a method to convert certain 'nonlinear-stochastic' Langevin equations into equivalent Itô stochastic differential equations, allowing for simulation and analysis. The method assumes finite variance and Gaussian noise in the original Langevin equation. The authors apply this technique to model the velocity of a particle experiencing drag in a turbulent fluid, demonstrating qualitatively different behavior compared to simpler models.

Aug 09, 12:40 PM

Irreversible entropy production, from quantum to classical

This review provides a unified framework for understanding entropy production in both classical and quantum systems, emphasizing the role of information theory. It explores how information gain, correlations, and quantum dynamics influence irreversibility, extending thermodynamic principles to the non-equilibrium realm.

Jul 14, 10:45 AM

Networks beyond pairwise interactions: structure and dynamics

This review explores the structure and dynamics of complex systems beyond pairwise interactions, using simplicial complexes and hypergraphs as frameworks. It highlights the impact of higher-order interactions on dynamics like diffusion, synchronization, and games, showing how they lead to novel phenomena and enhanced modeling capabilities.

Jul 14, 10:45 AM

Existence of chaos for partial difference equations via tangent and cotangent functions

This paper introduces four chaotification schemes for partial difference equations involving tangent and cotangent functions. The schemes are shown to induce chaos in the sense of Li-Yorke or both Li-Yorke and Devaney, demonstrating how these trigonometric functions can be used as controllers to create chaotic behavior in such equations.

s13662-020-03162-2.pdf

Jul 14, 10:45 AM

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