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We study a family of interacting particle systems with annihilating and coalescing reactions. Two types of particles are interspersed throughout a transitive unimodular graph. Both types diffuse as simple random walks with possibly…

Probability · Mathematics 2025-11-04 Sungwon Ahn , Matthew Junge , Hanbaek Lyu , Lily Reeves , Jacob Richey , David Sivakoff

The multiple colliding laser pulse concept formulated in Ref. [1] is beneficial for achieving an extremely high amplitude of coherent electromagnetic field. Since the topology of electric and magnetic fields oscillating in time of multiple…

Plasma Physics · Physics 2017-01-13 S. V. Bulanov , T. Zh. Esirkepov , S. S. Bulanov , J. K. Koga , Z. Gong , X. Q. Yan , M. Kando

Both action potentials and mechanosensitive signalling are an important communication mechanisms in plants. Considering an information theoretic framework, this paper explores the effective range of multiple action potentials for a long…

Molecular Networks · Quantitative Biology 2019-11-13 Hamdan Awan , Kareem Zeid , Raviraj S. Adve , Nigel Wallbridge , Carrol Plummer , Andrew W. Eckford

Experimental data suggest that some classes of spiking neurons in the first layers of sensory systems are electrically coupled via gap junctions or ephaptic interactions. When the electrical coupling is removed, the response function…

Neurons and Cognition · Quantitative Biology 2007-05-23 Lucas S. Furtado , Mauro Copelli

We demonstrate that our recently developed theory of electric field wave propagation in anisotropic and inhomogeneous brain tissues, which has been shown to explain a broad range of observed coherent synchronous brain electrical processes,…

Biological Physics · Physics 2024-03-27 Vitaly L. Galinsky , Lawrence R. Frank

Many plants, such as Mimosa pudica (the sensitive plant), employ electrochemical signals known as action potentials (APs) for rapid intercellular communication. In this paper, we consider a reaction diffusion model of individual AP signals…

Neurons and Cognition · Quantitative Biology 2019-04-05 Hamdan Awan , Raviraj S. Adve , Nigel Wallbridge , Carrol Plummer , Andrew W. Eckford

Some mechanisms of cardiac arrhythmias can be presented as a composition of elementary acts of block and reflection on the contacts of homogeneous areas of the conducting tissue. For study this phenomena we use an axiomatic one-dimensional…

Other Quantitative Biology · Quantitative Biology 2021-07-06 Sergii Kovalchuk

Action potential generation underlies some of the most consequential dynamical systems on Earth, from brains to hearts. It is therefore interesting to develop synthetic cell-free systems, based on the same molecular mechanisms, which may…

Biological Physics · Physics 2024-03-07 Ziqi Pi , Giovanni Zocchi

Plasma processes close to SNR shocks result in the amplification of magnetic fields and in the acceleration of electrons, injecting them into the diffusive acceleration mechanism. The acceleration of electrons and the B field amplification…

High Energy Astrophysical Phenomena · Physics 2015-06-09 M E Dieckmann , G Murphy , A Meli , L O C Drury

A 3D Cellular Automaton model developed by the authors to deal with the dynamics of N-body interactions has been adapted to investigate the head-on collision of two identical bound clusters of particles, and the ensuing process of…

Nuclear Theory · Physics 2011-07-19 A. Lejeune , J. Perdang , J. Richter

We study relativistic collisions between helium-like uranium ions initially in the ground state and atoms in which, in a single collision event, one of the electrons of the ion is emitted and the other is transferred into an excited state…

Atomic Physics · Physics 2009-11-13 B. Najjari , A. B. Voitkiv

This paper proposes a model of interactions between two point processes, ruled by a reproduction function h, which is considered as the intensity of a Poisson process. In particular, we focus on the context of neurosciences to detect…

Statistics Theory · Mathematics 2014-03-07 Laure Sansonnet , Christine Tuleau-Malot

We study the interaction between a single two-level atom and a single-photon probe pulse in a guided mode of a nanofiber. We examine the situation of chiral interaction, where the atom has a dipole rotating in the meridional plane of the…

Quantum Physics · Physics 2020-07-01 Fam Le Kien , Sile Nic Chormaic , Thomas Busch

We use electromagnetic Particle-in-Cell codes to investigate the two-stream instability and Weibel instability when two beams of plasma collide head-on relativistically. We compare the dissipation of kinetic energies in the two cases. We…

Astrophysics · Physics 2008-03-11 Orestes P. Hastings , Edison Liang

Self-propulsion (SP) is a main feature of active particles (AP), such as bacteria or biological micromotors, distinguishing them from passive colloids. A renowned consequence of SP is accumulation at static interfaces, even in the absence…

Soft Condensed Matter · Physics 2017-09-12 U. Marini Bettolo Marconi , A. Sarracino , C. Maggi , A. Puglisi

Within the matrix product state framework, we study the non-Markovian feedback dynamics of a two-level system interacting with the electromagnetic field inside a semi-infinite waveguide where the excitation of an atom-photon bound state is…

Quantum Physics · Physics 2021-03-17 Kisa Barkemeyer , Andreas Knorr , Alexander Carmele

In the past decade, the cell-type specific connectivity and activity of local cortical networks have been characterized experimentally to some detail. In parallel, modeling has been established as a tool to relate network structure to…

Neurons and Cognition · Quantitative Biology 2011-06-29 Tobias C. Potjans , Markus Diesmann

Interactions between crawling cells, which are essential for many biological processes, can be quantified by measuring cell-cell collisions. Conventionally, experiments of cell-cell collisions are conducted on two-dimensional flat…

Biological Physics · Physics 2025-10-24 Yongtian Luo , Amrinder S. Nain , Brian A. Camley

Head-on collisions of ion-acoustic solitary waves in a collisionless plasma consisting of cold ions and Boltzmann electrons are studied using the particle-in-cell simulation. It is shown that the collision of solitary waves can occur under…

Plasma Physics · Physics 2019-09-04 Yu. V. Medvedev

An electron injector concept for laser-plasma accelerator was developed in ref [1] and [2] ; it relies on the use of counter-propagating ultrashort laser pulses. In [2], the scheme is as follows: the pump laser pulse generates a large…

Plasma Physics · Physics 2009-11-13 C. Rechatin , J. Faure , A. Lifschitz , V. Malka , E. Lefebvre