Editorial Material
Multidisciplinary Sciences
Sam Cameron, Tannie Liverpool
Summary: This theory suggests that active agents can cooperate even in the presence of disorder. This finding is important for the design of robots and the study of cell migration mechanisms.
Article
Physics, Fluids & Plasmas
Remi Goerlich, Luis Barbosa Pires, Giovanni Manfredi, Paul-Antoine Hervieux, Cyriaque Genet
Summary: This study proposes the use of a correlated noise bath to drive an optically trapped Brownian particle that mimics active biological matter. By controlling different parameters with unprecedented accuracy, the researchers are able to reach strongly correlated regimes that are not easily accessible in real active matter. They found that by adjusting the correlation time of the noise as a control parameter, transitions between two nonequilibrium steady states can be triggered without expending work but with a calorific cost. The measured heat production is directly proportional to the spectral entropy of the correlated noise, similar to Landauer's principle.
Review
Multidisciplinary Sciences
Giorgio Volpe, Clemens Bechinger, Frank Cichos, Ramin Golestanian, Hartmut Lowen, Matthias Sperl, Giovanni Volpe
Summary: Active matter research is an important field that combines non-equilibrium thermodynamics with applications in biology, robotics, and nano-medicine. Gravity-driven phenomena on Earth can limit the study of soft active matter systems, but these limitations can be overcome in space to unify our understanding of active matter systems and provide guidance for space exploration and colonization.
Article
Multidisciplinary Sciences
Anis Senoussi, Jean-Christophe Galas, Andre Estevez-Torres
Summary: The study integrates reaction-diffusion and active matter mechanisms, controlling mechano-chemical coupling through dissipative DNA/enzyme reaction networks in an active gel, successfully designing a synthetic material mimicking the polarization mechanism in C. elegans oocytes.
Article
Physics, Fluids & Plasmas
Nikita P. Kryuchkov, Artur D. Nasyrov, Konstantin D. Gursky, Stanislav O. Yurchenko
Summary: The effects of inertia and motility-induced phase separation (MIPS) in active matter have gained attention, but are still poorly understood. Through molecular dynamic simulations, we investigated MIPS behavior in Langevin dynamics across a wide range of particle activity and damping rate values. Our results show that the MIPS stability region consists of multiple domains separated by abrupt changes in susceptibility of mean kinetic energy. These domain boundaries are reflected in the system's kinetic energy fluctuations and properties of gas, liquid, and solid phases. The observed cascade of domains is most stable at intermediate damping rates, but disappears in the limit of Brownian motion or along with phase separation at lower damping values.
Article
History & Philosophy Of Science
Collin Rice
Summary: Both ecologists and statistical physicists use highly idealized models to study active matter and self-organizing critical phenomena. In this paper, the author shows how universality classes can justify the use of minimal models to explain the critical behaviors of various systems, despite differences in causes and mechanisms. The author argues that identifying common causes or mechanisms is insufficient in explaining these cases, and instead, the use of minimal models is justified by their membership in the same universality class as real systems with different causes and mechanisms.
Editorial Material
Multidisciplinary Sciences
Jason Detwiler
Summary: This article discusses the use of a cubic metre of tellurium held at cryogenic temperatures over many years to search for matter created in a rare nuclear process. The achievement paves the way for stabilizing other complex systems at low temperatures.
Article
Astronomy & Astrophysics
Ilidio Lopes
Summary: Our study investigates the complex interaction between active neutrinos and the ultralight bosonic dark matter halo surrounding the Sun, and reveals that novel models do not surpass the performance of the conventional neutrino flavour oscillation model based on available solar neutrino flux data. Next-generation solar neutrino detectors have the potential to provide evidence for the existence or absence of the ultralight-dark matter halo.
Article
Chemistry, Physical
Haiqin Wang, Tiezheng Qian, Xinpeng Xu
Summary: Onsager's variational principle is a powerful tool for formulating thermodynamically consistent models and finding approximate solutions, especially in the study of soft matter dynamics. By extending OVP to active matter dynamics, analyzing the directional motion of active units, and formulating diffuse-interface models, it provides a general approach to better understand the emergent behaviors of individual animal cells and cell aggregates or tissues.
Editorial Material
Multidisciplinary Sciences
Alberto Crepaldi
Summary: When black phosphorus, a semiconductor material, is exposed to intense laser light, it was observed that the behavior of its electrons changed. This discovery paves the way for time-dependent engineering of exotic electronic phases in solids.
Article
Physics, Multidisciplinary
Matteo Paoluzzi, Demian Levis, Ignacio Pagonabarraga
Summary: This study investigates the transition between glassy and fluid states in dense active materials, revealing that the mechanisms leading to fluidization in active systems do not have an equilibrium counterpart.
COMMUNICATIONS PHYSICS
(2022)
Article
Astronomy & Astrophysics
Alexander V. Gramolin, Arne Wickenbrock, Deniz Aybas, Hendrik Bekker, Dmitry Budker, Gary P. Centers, Nataniel L. Figueroa, Derek F. Jackson Kimball, Alexander O. Sushkov
Summary: This article investigates the spectral line shapes of axionlike dark matter and discusses their importance in optimizing experimental design and data analysis. The authors extend previous results on axion-photon and axion-gluon couplings to the case of gradient coupling and examine the directional sensitivity of the corresponding haloscope. They also analyze the daily and annual modulations of the gradient signal caused by Earth's motions, which could serve as important evidence for the detection of axionlike particles in our Galaxy's halo.
Article
Astronomy & Astrophysics
Claudio Andrea Manzari, Stefano Profumo
Summary: The discrepancies between data on rare b-hadron decays and the corresponding Standard Model predictions could be a hint for new physics. This study suggests that leptoquarks, particularly the scalar leptoquark S3, could explain these anomalies and also serve as a portal to a fermionic dark sector consisting of two additional vectorlike fermions, one of which could be a candidate for cosmological dark matter. The study explores different scenarios and discusses the implications for direct and indirect dark matter searches, finding that high-energy gamma-ray telescopes such as HESS and the Cherenkov Telescope Array could provide powerful constraints on these models.
Article
Physics, Multidisciplinary
Qidong Fu, Peng Wang, Yaroslav V. Kartashov, Vladimir V. Konotop, Fangwei Ye
Summary: This theoretical study investigates the nonlinear quantized Thouless pumping of a Bose-Einstein condensate loaded in two-dimensional dynamical optical lattices, identifying three different pumping scenarios and highlighting the importance of the initial number of atoms and two-body interactions strength. The article also discusses the role of Chern numbers and two-body interactions in determining the displacement of a wave packet.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Multidisciplinary
Benjamin A. Stickler, Mira Diekmann, Robert Berger, Daqing Wang
Summary: Molecular matter-wave interferometry allows manipulation of internal mechanical motion of complex molecules, such as preparing chiral molecules in a quantum superposition and observing tunneling dynamics. The study proposes a setup to sense chiral-dependent forces and environment-induced superselection of handedness, while identifying promising candidates for implementing the proposal. This work marks a milestone in quantum sensing with chiral molecules.
Article
Physics, Multidisciplinary
Marjolein N. van der Linden, Lachlan C. Alexander, Dirk G. A. L. Aarts, Olivier Dauchot
PHYSICAL REVIEW LETTERS
(2019)
Article
Physics, Multidisciplinary
Mathias Casiulis, Marco Tarzia, Leticia F. Cugliandolo, Olivier Dauchot
PHYSICAL REVIEW LETTERS
(2020)
Article
Physics, Multidisciplinary
Pavan V. Kashyap, Yohann Duguet, Olivier Dauchot
News Item
Physics, Multidisciplinary
Olivier Dauchot
Article
Physics, Multidisciplinary
Rahul N. Chacko, Francois P. Landes, Giulio Biroli, Olivier Dauchot, Andrea J. Liu, David R. Reichman
Summary: As liquids approach the glass transition temperature, dynamical heterogeneity becomes a crucial universal feature of their behavior. Dynamic facilitation, where local motion triggers further motion nearby, is a major player in this phenomenon. Long-ranged, elastically mediated facilitation appears below the mode coupling temperature, in addition to the short-range component present at all temperatures. These results suggest strong connections between the supercooled liquid and glass states, laying the groundwork for a deeper understanding of dynamical heterogeneity in glassy systems.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Juliane U. Klamser, Olivier Dauchot, Julien Tailleur
Summary: The study reveals that for kinetic Monte Carlo descriptions of active particles, a continuous-time limit is ill-defined when relying solely on persistent, active steps. However, mixing passive steps with active ones can lead to a well-defined continuous-time limit. New KMC algorithms are proposed to obtain dynamics of active Ornstein-Uhlenbeck, active Brownian, and run-and-tumble particles.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
P. Baconnier, D. Shohat, C. Hernandez Lopez, C. Coulais, V Demery, G. During, O. Dauchot
Summary: This study introduces a minimal realization of an active elastic solid and characterizes the emergence of selective and collective actuation resulting from the interplay between activity and elasticity. The bifurcation scenario and selection mechanism by which the collective actuation takes place are unveiled through experiments and theoretical analyses.
Article
Physics, Multidisciplinary
Pavan V. Kashyap, Yohann Duguet, Olivier Dauchot
Summary: The formation of laminar-turbulent pattern is a distinctive feature of the intermittency regime in subcritical plane shear flows. Through extensive numerical simulations, it is shown that the pattern arises from a spatial modulation of turbulent flow due to linear instability. By sampling the linear response of turbulent field to a temporal impulse, the dispersion relation is constructed from ensemble-averaged relaxation rates. As the instability threshold is approached, the relaxation rate of the least damped modes eventually reaches zero.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Multidisciplinary
Paul Baconnier, Dor Shohat, Olivier Dauchot
Summary: The recent finding of collective actuation in active solids provides new possibilities for the design of multifunctional materials and the understanding of biological systems. The study combines experimental and numerical approaches to reveal a new form of collective actuation and highlight the role of mechanical tension in transitioning between different actuation regimes. The presence of hysteresis emphasizes the nontrivial selectivity of collective actuations.
PHYSICAL REVIEW LETTERS
(2023)
Article
Chemistry, Physical
Nuno A. M. Araujo, Liesbeth M. C. Janssen, Thomas Barois, Guido Boffetta, Itai Cohen, Alessandro Corbetta, Olivier Dauchot, Marjolein Dijkstra, William M. Durham, Audrey Dussutour, Simon Garnier, Hanneke Gelderblom, Ramin Golestanian, Lucio Isa, Gijsje H. Koenderink, Hartmut Loewen, Ralf Metzler, Marco Polin, C. Patrick Royall, Andela Saric, Anupam Sengupta, Cecile Sykes, Vito Trianni, Idan Tuval, Nicolas Vogel, Julia M. Yeomans, Iker Zuriguel, Alvaro Marin, Giorgio Volpe
Summary: Self-organisation is the spontaneous emergence of spatio-temporal structures and patterns from the interaction of smaller individual units. Confinement can mediate and control self-organisation by limiting the translational and rotational degrees of freedom, acting as a catalyst or inhibitor. By constraining the self-organisation process in soft-matter systems, confinement can actively steer the emergence or suppression of collective phenomena in space and time.
Article
Robotics
Matan Yah Ben Zion, Jeremy Fersula, Nicolas Bredeche, Olivier Dauchot
Summary: We present a mechanical design rule that enables robots to operate in a collision-dominated environment. By encoding a reorientation response to external forces in a three-dimensional printed exoskeleton, we enhance the motility and stability of individual robots and leverage steric interactions for collective behavior. This mechanical layer adds to the robot's sense-act cycle at the swarm level and promotes information flow for online distributed learning.
Article
Physics, Fluids & Plasmas
Caleb J. Anderson, Guillaume Briand, Olivier Dauchot, Alberto Fernandez-Nieves
Summary: The configurations of polymers in out-of-equilibrium baths have implications in biological systems. Comparing with thermal-like baths, active baths affect the polymer's Kuhn length and lead to more prominent bends in their configurations.
Article
Chemistry, Physical
Charlotte de Blois, Vincent Bertin, Saori Suda, Masatoshi Ichikawa, Mathilde Reyssat, Olivier Dauchot
Summary: The behavior of self-propelled water-in-oil droplets in capillaries of different cross-sections was experimentally investigated. It was found that the velocity of the droplet decreases with increasing confinement in straight capillaries, but even very long droplets can still swim at very high confinement. In stretched circular capillaries, the non-uniform thickness of the lubrication layer around the droplet leads to neck formation and eventual spontaneous splitting events for large enough confinement, highlighting the critical role of the droplet's interface activity under confinement.
Article
Physics, Fluids & Plasmas
Pierre Illien, Charlotte de Blois, Yang Liu, Marjolein N. van der Linden, Olivier Dauchot
