EPJ D Highlight - Atoms slow down more within colder blackbody radiation
- Published on 10 February 2023
New analysis shows that atoms will encounter high frictional forces in the presence of blackbody radiation at lower temperatures. Accounting for this effect could help researchers to improve the accuracy of high-precision experiments.
Blackbody radiation (BBR) contains electromagnetic waves with characteristic spectra, which changes shape depending on the temperature of the body. When moving atoms encounter these fields, they experience a repulsive force which slows down their movement towards the source of the radiation. Through new analysis published in EPJ D, Vipul Badhan and colleagues at Guru Nanak Dev University, India, show that the influence of this ‘blackbody friction force’ (BBFF) is particularly strong at lower temperatures.
EPJ D Topical review - Theory and molecular simulations of plasma sputtering, transport and deposition processes
- Published on 03 February 2023
A new Topical Review published in EPJD provides an overview of the basic theory of sputtering with recent models, focussing in particular on sputtered atom energy distribution functions. Models such as Monte-Carlo, kinetic Monte-Carlo, and classical Molecular Dynamics simulations are presented due to their ability to describe the various processes involved in sputtering, transport and deposition processes.
EPJ D Highlight - Alain Aspect: The physicist who made entanglement an experimental reality
- Published on 23 January 2023
For Einstein and other physicists of his generation, the strongly counter-intuitive features of quantum mechanics were very hard to accept, given that our intuition is based on the classical world around us. This EPJ D Topical Issue examines the discoveries, motivations, and continuing legacy of Alain Aspect: the physicist whose experiments, along with those of John Clauser and Anton Zeilinger, have made that quantum entanglement, an essentially non-classical feature, is now also an experimental reality, exploited in science and technology.
EPJ D Topical Issue: Advances in Multi-Scale Modelling of Intense Electronic Excitation Processes
- Published on 12 December 2022
Guest Editors: Jorge Kohanoff, Antonio Rivera, Eduardo Oliva Gonzalo, Andrey V Solov'yov and Tzveta Apostolova
Processes occurring in a target after irradiation span many orders of magnitude in space and time, which makes them intractable within a single rigorous approach. Typically, only partial aspects related to the radiation-induced effects in matter are treated. The lack of a systematic methodology to simulate the underlying phenomena hinders advances in various fields, and poses challenges to theoreticians, simulators, and experimentalists. It is therefore important to tackle this problem from a multi-scale perspective. This is the realm of this Topical collection, published in the Eur. Phys. J. D (EJPD Topical collection), which includes articles covering a wide range of methods, namely TDDFT, time-dependent Schrödinger equation in one or two-electron approximation, radiation Monte Carlo, Boltzmann transport equation, radiation-hydrodynamics and ab initio and classical Molecular Dynamics.
EPJ D Topical Issue on Quantum Aspects of Attoscience
- Published on 24 October 2022
This collection of articles contains contributions arising from the virtual conference Quantum Battles in Attoscience. The conference attracted more than 300 attendees from 34 different countries, and has spawned a successful series of bimonthly, online seminars – the so called 'AttoFridays'.
The aim of this novel workshop format was to support constructive debate about areas of controversy in attosecond science, and the centrepiece of the conference program were the Quantum Battles - an interactive, structured debate between early career researchers from competing groups in each field. These three battles – on tunnelling, interference and imaging in intense laser fields, and analytical vs ab initio theoretical approaches – have been written up as articles for this collection and each serves as an in-depth review of the topics, and the controversies therein. Alongside these are several articles on the quantum aspects of attosecond science including decoherence and entanglement in strong or tailored fields and ultrafast dynamics in novel materials. The collection is thus unusual in that it spans fundamental atomic and quantum physics all the way up to quantum technologies.
EPJ D Colloquium - Electron scattering processes: fundamentals, challenges, advances, and opportunities
- Published on 05 October 2022
Perspectives of a global team of experts on recent and significant advances and challenges in the electron scattering field
Over the past several decades, significant efforts of the electron-scattering community have been devoted to achieving an in-depth and comprehensive understanding of processes that involve low-energy electron interactions with diverse targets, ranging from atoms to complex systems.
EPJD supports public lecture by Nobel Laureate William D Phillips
- Published on 30 September 2022
EPJD is proud to support the forthcoming public lecture by Nobel Laureate William D Phillips on "Time, Einstein and the Coolest Stuff in the Universe". All are welcomed to join this lecture online at the following
on October 4th 2022
6pm EEST / 5pm CET / 4pm BST / 9am EDT
EPJ D Colloquium - Overview of photo-neutralization techniques for negative ion-based neutral beam injectors in future fusion reactors
- Published on 16 August 2022
The need for safe, carbon-free and abundant sources of energy is becoming more and more pressing. While still under development, nuclear fusion can play a key role in a medium term, decarbonized energy scenario. However, in order for fusion to be commercially competitive, many sub-systems constituting the current experimental reactors need to be optimized in terms of their efficiency: in particular, DEMO and future fusion energy plants will require a substantial increase in the energy performances of the plasma heating systems.
EPJ D Highlight - Investigating the temperature of large biomolecules in ion-storage rings with jellyfish protein
- Published on 24 June 2022
New research introduces a simple way to determine the temperature of a stored biomolecule and assess how it changes over time
The range of applications for ultracold molecular systems has grown impressively over recent years to include interstellar chemistry, spectroscopy, and arguably most excitingly, quantum computing.
One way of cooling molecules is by trapping them in cooled ion traps to which the molecules are thermalised before being injected or by injecting them into a room temperature storage ring and then cooling it. To do this effectively, researchers need a method to determine the temperature of molecular ions in an ion-storage ring.
New research published in EPJ D introduces a relatively simple new way to determine the temperature of stored biomolecular ions produced by electrospray ionization, and measure the time evolution of the temperature. The research is authored by Anne P. Rasmussen, Ricky Teiwes, and Lars H. Andersen of the Department of Physics and Astronomy, Aarhus University, Denmark, along with Dilara A. Farkhutdinova, and Anastasia V. Bochenkova of Lomonosov of the Moscow State University chemistry department, Russia.
EPJ D Highlight - Investigating positron scattering from giant molecular targets
- Published on 24 June 2022
New research looks at positron scattering from rare gas atoms encapsulated in carbon 60 to investigate quantum properties that can’t be tested with electrons.
Particle scattering is an important test of the quantum properties of atoms and larger molecules. While electrons have historically dominated these experiments, their positively charged antimatter counterparts — positrons — can be used in promising applications when the negatively charged particles aren’t suitable.
A new paper published in EPJ D examines the scattering of positrons from rare gas atoms stuffed inside the fullerenes — so-called “rare gas endohedrals.” The paper is authored by Km Akanksha Dubey from the Indian Institute of Technology Patna, Patna, Bihta, India, and Marcelo Ciappina, Guangdong Technion-Israel Institute of Technology, Shantou, China.