94 citations · 518 across the 25 of their papers we have counts for
25 papers
When does nonreciprocity matter? Scale-dependence and nonequilibrium signatures
Sarah A. M. Loos, Robert L. Jack
Nonreciprocity is increasingly recognized as a unifying concept linking diverse nonequilibrium phenomena found across physics, chemistry, and biology. It gives rise to distinctive…
Nonreciprocal Disorder Prevents Zero-Temperature Freezing in a Ferromagnet
Noah Grodzinski, Robert L. Jack, Sarah A. M. Loos
Nonreciprocal interactions underpin diverse nonequilibrium phenomena, yet the effects of quenched nonreciprocity in extended systems remain largely unexplored. We study a Isin…
The XY model with vision cone: non-reciprocal vs. reciprocal interactions
Gabriele Bandini, Davide Venturelli, Sarah A. M. Loos +2
We study the behavior of the classical XY model on a two-dimensional square lattice, with interactions occurring within a vision cone of each spin. Via Monte Carlo simulations, we…
Universal symmetry of optimal control at the microscale
Sarah A. M. Loos, Samuel Monter, Felix Ginot +1
Optimizing the energy efficiency of driving processes provides valuable insights into the underlying physics and is of crucial importance for numerous applications, from biological…
Stochastic thermodynamics of a probe in a fluctuating correlated field
Davide Venturelli, Sarah A. M. Loos, Benjamin Walter +2
We develop a framework for the stochastic thermodynamics of a probe coupled to a fluctuating medium with spatio-temporal correlations, described by a scalar field. For a Brownian p…
Time-reversal and PT symmetry breaking in non-Hermitian field theories
Thomas Suchanek, Klaus Kroy, Sarah A. M. Loos
We study time-reversal symmetry breaking in non-Hermitian fluctuating field theories with conserved dynamics, comprising the mesoscopic descriptions of a wide range of nonequilibri…
Entropy production in the nonreciprocal Cahn-Hilliard model
Thomas Suchanek, Klaus Kroy, Sarah A. M. Loos
We study the nonreciprocal Cahn-Hilliard model with thermal noise as a prototypical example of a generic class of non-Hermitian stochastic field theories, analyzed in two companion…
Irreversible mesoscale fluctuations herald the emergence of dynamical phases
Thomas Suchanek, Klaus Kroy, Sarah A. M. Loos
We study fluctuating field models with spontaneously emerging dynamical phases. We consider two typical transition scenarios associated with parity-time symmetry breaking: oscillat…
Perspectives on adaptive dynamical systems
Jakub Sawicki, Rico Berner, Sarah A. M. Loos +21
Adaptivity is a dynamical feature that is omnipresent in nature, socio-economics, and technology. For example, adaptive couplings appear in various real-world systems like the powe…
Nonreciprocal nanoparticle refrigerators: design principles and constraints
Sarah A. M. Loos, Saeed Arabha, Ali Rajabpour +2
We study the heat transfer between two nanoparticles held at different temperatures that interact through nonreciprocal forces, by combining molecular dynamics simulations with sto…
Long-range Order and Directional Defect Propagation in the Nonreciprocal XY Model with Vision Cone Interactions
Sarah A. M. Loos, Sabine H. L. Klapp, Thomas Martynec
We study a two-dimensional, nonreciprocal XY model, where each spin interacts only with its nearest neighbours in a certain angle around its current orientation, i.e., its `vision…
The impact of memory on learning sequence-to-sequence tasks
Alireza Seif, Sarah A. M. Loos, Gennaro Tucci +2
The recent success of neural networks in natural language processing has drawn renewed attention to learning sequence-to-sequence (seq2seq) tasks. While there exists a rich literat…
Equilibrium Stochastic Delay Processes
Viktor Holubec, Artem Ryabov, Sarah A. M. Loos +1
Stochastic processes with temporal delay play an important role in science and engineering whenever finite speeds of signal transmission and processing occur. However, an exact mat…
Finite-size scaling at the edge of disorder in a time-delay Vicsek model
Viktor Holubec, Daniel Geiss, Sarah A. M. Loos +2
Living many-body systems often exhibit scale-free collective behavior reminiscent of thermal critical phenomena. But their mutual interactions are inevitably retarded due to inform…
Entropy production at criticality in a nonequilibrium Potts model
Thomas Martynec, Sabine H. L. Klapp, Sarah A. M. Loos
Understanding nonequilibrium systems and the consequences of irreversibility for the system's behavior as compared to the equilibrium case, is a fundamental question in statistical…
Correlation functions of non-Markovian systems out of equilibrium: Analytical expressions beyond single-exponential memory
Timo J. Doerries, Sarah A. M. Loos, Sabine H. L. Klapp
This paper is concerned with correlation functions of stochastic systems with memory, a prominent example being a molecule or colloid moving through a complex (e.g., viscoelastic)…
Ergodicity and equidistribution in strictly convex Hilbert geometry
Feng Zhu
In this paper we show that dynamical and counting results characteristic of negatively-curved Riemannian geometry, or more generally CAT(-1) or rank-one CAT(0) spaces, also hold fo…
Non-reciprocal hidden degrees of freedom: A unifying perspective on memory, feedback, and activity
Sarah A. M. Loos, Simon M. Hermann, Sabine H. L. Klapp
We show that memory, feedback, and activity are all describable by the same unifying concept, that is non-reciprocal (NR) coupling. We demonstrate that characteristic thermodynamic…
Fokker-Planck equations for time-delayed systems via Markovian Embedding
Sarah A. M. Loos, Sabine H. L. Klapp
For stochastic systems with discrete time delay, the Fokker-Planck equation (FPE) of the one-time probability density function (PDF) does not provide a complete, self-contained pro…
Heat flow due to time-delayed feedback
Sarah A. M. Loos, Sabine H. L. Klapp
The thermodynamics of stochastic non-Markovian systems is still widely unexplored. We present an analytical approach for the net steady-state heat flux in nonlinear overdamped syst…
Force-linearization closure for non-Markovian Langevin systems with time delay
Sarah A. M. Loos, Sabine H. L. Klapp
This paper is concerned with the Fokker-Planck (FP) description of classical stochastic systems with discrete time delay. The non-Markovian character of the corresponding Langevin…
Feedback control of colloidal transport
R. Gernert, S. A. M. Loos, K. Lichtner +1
We review recent work on feedback control of one-dimensional colloidal systems, both with instantaneous feedback and with time delay. The feedback schemes are based on measurement…
Chimera patterns under the impact of noise
Sarah A. M. Loos, Jens Christian Claussen, Eckehard Schöll +1
We investigate two types of chimera states, i.e., patterns consisting of coexisting spatially separated domains with coherent and incoherent dynamics, in ring networks of Stuart-La…
Stable and transient multi-cluster oscillation death in nonlocally coupled networks
Isabelle Schneider, Marie Kapeller, Sarah Loos +3
In a network of nonlocally coupled Stuart-Landau oscillators with symmetry-breaking coupling, we study numerically, and explain analytically, a family of inhomogeneous steady state…