- Published on 15 January 2020
A theoretical analysis of electron spins in slowly moving quantum dots suggests these can be controlled by electric fields.
The name ‘quantum dots’ is given to particles of semiconducting materials that are so tiny – a few nanometres in diameter – that they no longer behave quite like ordinary, macroscopic matter. Thanks to their quantum-like optical and electronic properties, they are showing promise as components of quantum computing devices, but these properties are not yet fully understood. Physicists Sanjay Prabhakar of Gordon State College, Georgia, USA and Roderick Melnik of Wilfrid Laurier University, Waterloo, Canada have now described the theory behind some of these novel properties in detail. This work is published in EPJ B.
- Published on 15 January 2020
A novel thermodynamic model to predict macroscopic viscosity of concentrated extractant systems in the presence of heavy metals is presented. The viscosity increase of monoamides in presence of uranyl is a challenging technological lock for industrial extraction processes. This work presents experimental indications on the origin of the viscosity increase and introduces a model based on the three well-established concepts of molecular packing parameters, supramolecular curvature and elasticity of amphiphilic film, as well as polymer physics extended to “living polymers”.
- Published on 10 January 2020
The new year sees big changes for EPJ B, with two new Editors-in-Chief appointed from January 2020. Prof Dr Heiko Rieger (Saarland University, Germany) and Prof Eduardo Hernandez (ICMM-CSIC, Spain) take on joint EiC roles, with broad responsibility for papers in statistical physics and condensed matter physics respectively. At the same time, Prof Bikas Chakrabarti (Saha Institute of Nuclear Physics, Kolkata, India) and Prof Wenhui Duan (Tsinghua University, China) step down from their roles as Executive Editors on the journal.
- Published on 08 January 2020
The Scientific Advisory Committee of EPJ is delighted to welcome Professor Eduard Boos as the new representative for the Russian Academy of Sciences.
Eduard Boos is Professor at Lomonosov Moscow State University (MSU) and head of high energy experimental physics department in the D.V. Skobeltsyn Institute of Nuclear Physics of MSU.
He is an active member of CMS collaboration at CERN LHC http://www.sinp.msu.ru/en/strukted/1655
His expertise will be highly appreciated for the review of and advice on the publishing strategy of EPJ. His membership of the committee will support the visibility of EPJ in his community.
EPJE Topical review - Viscosity of nanofluids containing anisotropic particles: A critical review and a comprehensive model
- Published on 24 December 2019
When compared to nanofluids with spherical particles, nanofluids with anisotropic particles possess higher thermal conductivity and thus offer a better enhancement option in heat transfer applications. The viscosity variation of such nanofluids becomes of great importance in evaluating their pumping power in thermal systems.
- Published on 23 December 2019
Theoretical calculations reveal that when impacted by positrons of particular energies, spherical nanoparticles release unstable electron-positron pairs, with signals dominating in the same direction as the incoming positrons.
When electrons collide with positrons, their antimatter counterparts, unstable pairs can form in which both types of particle orbit around each other. Named ‘positronium’, physicists have now produced this intriguing structure using a diverse range of positron targets – from atomic gases to metal films. However, they have yet to achieve the same result from vapours of nanoparticles, whose unique properties are influenced by the ‘gases’ of free electrons they contain in well-defined, nanoscopic regions. In new research published in EPJ D, Paul-Antoine Hervieux at the University of Strasbourg, France and Himadri Chakraborty at Northwest Missouri State University, USA, reveal the characteristics of positronium formation within football-shaped nanoparticles, C60, for the first time. At specific positron impact energies, they show that positronium emission dominates in the same direction as the incoming antiparticles.
- Published on 23 December 2019
EPJ is pleased to announce that January 2020 will see the appointment of two new Editors-in-Chief for EPJ E, Prof Fabrizio Croccolo (Université de Pau et des Pays de l'Adour, France) and Prof Dr Holger Stark (Technische Universität Berlin, Germany).
- Published on 18 December 2019
EPJ is pleased to announce that Prof Sylwia Ptasinska of the University of Notre Dame, USA has been appointed as an Editor-in-Chief for EPJ D, effective January 2020. She will be responsible for the plasmas section of the journal, and succeeds Prof Holger Kersten, who steps down after five years in the role. A faculty member at Notre Dame since 2010, her research focuses on understanding the variety of processes occurring in heterogeneous systems, including plasmas and interfaces. Though experimental investigations in her laboratory address fundamental questions, the goal of her team is to apply this research in areas such as energy, medicine, and industry. Sylwia Ptasinska is a member of the Executive Committee for the Gaseous Electronics Conference (GEC) and is also the local chair of the next POSMOL meeting. She has been a member of the Editorial Board for EPJD since 2015.
- Published on 17 December 2019
The incoming Chair for the year 2020 of the Scientific Advisory Committee (SAC) of EPJ, Jef Ongena, President of the Belgian Physical Society, will host the annual SAC meeting in April 2020, in Brussels. The venue of the meeting is the Club Prince Albert in Brussels.
The SAC, with its representatives from physical societies in Europe, advises the Steering Committee in all matters that concern EPJ such as the scientific policy and conduct to ethical standards, nomination of new Editors-in-Chief, publishing strategies and the visibility of EPJ in the physics community. The Chair of the SAC rotates each year among its members. The close proximity of EPJ to physicists and the physical societies undoubtedly contributes to its good reputation, while the direct involvement of physical societies remains an absolute priority to EPJ.
More information here.
- Published on 16 December 2019
A new prototype design doubles the frequencies of widely used telecommunications lasers to study the dynamics of cold atoms while in space.
By tracking the motions of cold atom clouds, astronomers can learn much about the physical processes which play out in the depths of space. To make these measurements, researchers currently use instruments named ‘cold atom inertial sensors’ which, so far, have largely been operated inside the lab. In new work published in EPJ D, a team of physicists at Muquans and LNE-SYRTE (the French national metrology laboratory for time, frequency and gravimetry) present an innovative prototype for a new industrial laser system. Their design paves the way for the development of cold atom inertial sensors in space.