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Epitaxial growth methods are a key technology used in producing large-area thin films on substrates but as a result of various factors controlling growth processes the rational optimization of growth conditions is rather difficult.…

Statistical Mechanics · Physics 2019-09-26 Kazuhiko Seki

We investigate the mechanisms of formation of stable (2+1)-dimensional optical soliton molecules (SMs) and breather molecules (BMs) in a Rydberg atomic gas, highlighting the distinct roles of nonlocality. The underlying giant, nonlocal…

Optics · Physics 2026-03-24 Lu Qin , Hairu Zhai , Zeyun Shi , Yingying Zhang , Zunlue Zhu , Wuming Liu , Xingdong Zhao

Understanding how patterns and travelling waves form in chemical and biological reaction-diffusion models is an area which has been widely researched, yet is still experiencing fast development. Surprisingly enough, we still do not have a…

Populations and Evolution · Quantitative Biology 2018-05-24 Andrea Cangiani , Emmanuil H. Georgoulis , Andrew Yu. Morozov , Oliver J. Sutton

Reaction-diffusion waves in multiple spatial dimensions advance at a rate that strongly depends on the curvature of the wave fronts. These waves have important applications in many physical, ecological, and biological systems. In this work,…

Pattern Formation and Solitons · Physics 2022-12-28 Pascal R. Buenzli , Matthew J. Simpson

We investigate the abiotic production of oxygen and its photochemical byproduct ozone through water vapor photolysis in moist atmospheres of temperate terrestrial exoplanets. The amount of water vapor available for photolysis in the middle…

Earth and Planetary Astrophysics · Physics 2018-08-08 Armin Kleinböhl , Karen Willacy , A. James Friedson , Pin Chen , Mark R. Swain

We investigate the properties of mixed H/He flames in X-ray bursts using 2D hydrodynamic simulations. We find that as the initial hydrogen abundance of the atmosphere increases, the flame is less energetic and propagates slower. The…

High Energy Astrophysical Phenomena · Physics 2025-05-21 Eric T. Johnson , Michael Zingale

For a better modeling of the importance of the different channels leading to the first aromatic ring, we have compared the structures of laminar rich premixed methane flames doped with several unsaturated hydrocarbons: allene and propyne,…

This study reexamines the excitation of ion-acoustic precursor solitons by a supersonically moving charged debris object, incorporating two previously overlooked physical factors: the dynamic charging of the debris and the impermeable…

Plasma Physics · Physics 2026-02-26 Ajaz Mir , Abhijit Sen , Pintu Bandyopadhyay , Sanat Tiwari , Chris Crabtree , Gurudas Ganguli

Direct interactions between the flow field and the chemical reaction in premixed flames occur when the reaction zone thickness is comparable to, or greater than flow length scales. To study such interactions, a laminar model is considered…

Fluid Dynamics · Physics 2024-07-02 Prabakaran Rajamanickam , Joel Daou

The effect of enhanced UV irradiation associated with stellar flares on the atmospheric composition and temperature of gas giant exoplanets was investigated. This was done using a 1D radiative-convective-chemical model with self-consistent…

Earth and Planetary Astrophysics · Physics 2023-06-21 Harrison Nicholls , Eric Hébrard , Olivia Venot , Benjamin Drummond , Elise Evans

This study presents a probabilistic surrogate model for localized wildfire spread based on a conditional flow matching algorithm. The approach models fire progression as a stochastic process by learning the conditional distribution of fire…

Machine Learning · Computer Science 2026-03-31 Bryan Shaddy , Haitong Qin , Brianna Binder , James Haley , Riya Duddalwar , Kyle Hilburn , Assad Oberai

Studying and interpreting the different flow patterns present in urban areas is becoming essential since they help develop new approaches to fight climate change through an improved understanding of the dynamics of the pollutants in urban…

The effects of chaotic advection and diffusion on fast chemical reactions in two-dimensional fluid flows are investigated using experimentally measured stretching fields and fluorescent monitoring of the local concentration. Flow symmetry,…

Fluid Dynamics · Physics 2009-11-13 P. E. Arratia , J. P. Gollub

In this article we investigate the semiflow properties of a class of state-dependent delay differential equations which is motivated by some models describing the dynamics of the number of adult trees in forests. We investigate the…

Dynamical Systems · Mathematics 2017-05-25 Pierre Magal , Zhengyang Zhang

The stability of interfaces and the mechanisms of thin film growth on semiconductors are issues of central importance in electronic devices. These issues can only be understood through detailed study of the relevant microscopic processes.…

mtrl-th · Physics 2016-09-07 Efthimios Kaxiras

We investigate the influence of convection on the formation of molecular spectral lines in the atmospheres of late-type giants. For this purpose we use the 3D hydrodynamical CO5BOLD and classical 1D LHD stellar atmosphere codes and…

Solar and Stellar Astrophysics · Physics 2011-05-02 A. Ivanauskas , A. Kucinskas , H. -G. Ludwig , E. Caffau

We investigate transport effects in in situ studies of defined model catalysts using a multi-scale modeling approach integrating first-principles kinetic Monte Carlo simulations into a fluid dynamical treatment. We specifically address two…

Materials Science · Physics 2013-07-25 Sebastian Matera , Karsten Reuter

The growth, form, and division of prebiotic vesicles, membraneous bags of fluid of varying components and shapes is hypothesized to have served as the substrate for the origin of life. The dynamics of these out-of-equilibrium structures is…

Soft Condensed Matter · Physics 2019-07-24 Teresa Ruiz-Herrero , Thomas G. Fai , L. Mahadevan

By identifying potential composite states that occur in the Sel'kov-Gray-Scott (GS) model, we show that it can be considered as an effective theory at large spatio-temporal scales, arising from a more \textit{fundamental} theory (which…

Statistical Mechanics · Physics 2013-10-24 Fred Cooper , Gourab Ghoshal , Alec Pawling , Juan Pérez Mercader

We investigate the chemical and observational implications of repetitive transient dense core formation in molecular clouds. We allow a transient density fluctuation to form and disperse over a period of 1 Myr, tracing its chemical…

Astrophysics · Physics 2009-11-11 R. T. Garrod , D. A. Williams , J. M. C. Rawlings