2022 Impact factor 2.8
Special Topics


EPJ PV Highlight - Communication on the potential of applied PV in the European Union: Rooftops, reservoirs, roads (R3)

Communication on the potential of applied PV in the European Union: Rooftops, reservoirs, roads (R3)

‘Communication on the potential of applied PV in the European Union: Rooftops, reservoirs, roads (R3)’ is a study conducted by the European Commission’s Joint Research Centre (JRC) that aims to assess the technical capacity potential of these three photovoltaic (PV) applications. The results were published recently in EPJ Photovoltaics.
Renewable energy technologies, like solar panels, are important for meeting the increasing demand for electricity and helping to combat climate change. The European Union (EU) has set ambitious targets for PV installation, but there are challenges to overcome, including competition for land and potential environmental drawbacks.
Indeed, the EU Solar Energy Strategy has outlined solid plans for PV installation, aiming for 385 GWDC (320 GWAC) by 2025 and 720 GWDC (600 GWAC) by 2030. While striving to meet these targets, it is crucial to ensure that the adoption of renewable energy sources does not adversely affect the environment and biodiversity, in accordance with EU policies on nature and wildlife conservation.


EPJ H Highlight - Tracing the history of perturbative expansion in quantum field theory

Perturbative expansions enabled the development of the Standard Model. Source: https://upload.wikimedia.org/ wikipedia/commons/0/00/Standard_ Model_of_Elementary_Particles.svg

Contrary to long-standing assumptions, simplified descriptions of quantum systems have played a central role in shaping the foundations of quantum field theory.

Perturbative expansion is a valuable mathematical technique which is widely used to break down descriptions of complex quantum systems into simpler, more manageable parts. Perhaps most importantly, it has enabled the development of quantum field theory (QFT): a theoretical framework which combines principles from classical, quantum, and relativistic physics, and serves as the foundation of the Standard Model of particle physics.

Yet despite its importance in shaping our understanding of the universe, the role of perturbative expansion has often been understated when discussing the mathematical and philosophical foundations of QFT. Through new analysis published in EPJ H: Historical Perspectives on Contemporary Physics, James Fraser at the University of Wuppertal, together with Kasia Rejzner at the University of York, bring the special status of perturbative expansions into sharper focus, by highlighting their deep-rooted relationship with the foundations of QFT.


EPJ Web of Conferences Highlight - CHEP2023: Computing in High Energy and Nuclear Physics

CHEP 2023 group photo in Norfolk, VA.

The 26th International Conference on Computing in High Energy and Nuclear Physics (CHEP), organized by Jefferson Lab, took place in Norfolk, Virginia, from 5–11 May 2023. The conference hosted roughly 600 registered participants from 28 different countries.

The CHEP conference series began in 1985 and has grown to become the largest of its kind, providing the unique opportunity for computing experts across particle and nuclear physics to come together and learn from each other.


EPJ D Highlight - A new simple scheme for atom interferometry

The team’s setup consists of two parallel nano-structured slabs that reflect an incident matter beam three times. Credit: J. Fiedler, B. Holst, EPJ D (2024)

New scheme proposes a simpler method for investigating matter waves with an ease of use that could make it ideal for commercial applications

Atom interferometers are devices that use the wave characteristics of matter to measure the phase between atomic matter waves to separate paths to make high-precision measurements of elements of physics, such as gravitational and magnetic fields. Atom interferometers have also found their way into industry and are used in geological surveys, mineral exploration, environmental monitoring, and for the development of precision atomic clocks.

Atom interferometers usually control matter waves and particularly particle velocity using lasers. Thus, the growth of atom interferometer application has been strongly tied to the development of advanced laser systems, with many current models based on the construction of gratings fashioned from laser beams. That means that an issue with these systems is the fact that they depend on the efficient operation of intricate laser systems. Additionally, while this method has achieved commendable precision, it fails slightly when considering shorter wavelengths.


EPJ B Highlight - A Mathematical Understanding of Project Schedules

A toy project with three interdependent activities A, B and C. The longest activity (A) sets the project duration. Copyright A. Vazquez

Complex projects are made up of many activities, the duration of which vary according to a power law; this model can be used to predict overall project duration and delay.

We have all been frustrated when a project is delayed because one sub-task cannot begin before another ends. It is less well known that the process of scheduling projects efficiently can be described in mathematical terms. Now, Alexei Vazquez, of technology company Nodes & Links and based in Cambridge, UK, has shown that the distribution of activity lengths in a project follows the mathematical relationship of power law scaling. He has published his findings in the journal EPJ B.


EPJ ST: Jingting Luo new Editor on board

The publishers of The European Physical Journal Special Topics are pleased to announce the appointment of Professor Jingting Luo as new Editor in the board.

Jingting Luo received the Ph.D. degree from Tsinghua University, Beijing, China, in 2012.

He worked as an Academic Visitor with the Faculty of Engineering and Environment, Northumbria University, Newcastle upon Tyne, U.K., in 2016.

Since 2012, he has been working as a Researcher with Shenzhen University, Shenzhen, China, where he is currently a Professor with the College of Physics and Optoelectronic Engineering. He is the Director of Shenzhen Key Laboratory of Advanced Thin Films and Applications.

He has published over 150 science citation index (SCI) journal articles and more than 20 high cited articles. He has extensive experience in thin film materials and devices, including optoelectronics thin film and solar cells, thermoelectric thin film and devices, smart thin films, biomedical microdevices, lab-on-chip, MEMS, sensors and microfluidics.

EPJ D Highlight - Probing neptunium’s atomic structure with laser spectroscopy

The mass separator used in the experiments. Green: ion trajectory; blue and violet, laser beams. Credit: EPJ, Kaja et al.

A new technique developed by researchers in Germany can measure ionisation states of this element more precisely than before, with implications for its detection and remediation in radioactive waste.

The radioactive element neptunium is one of the principal components of nuclear waste. Mass spectrometry can be used to probe its complex atomic structure, which is of value both for its intrinsic interest and for determining the isotope composition of neptunium waste. Magdalena Kaja at Johannes Gutenberg University, Mainz, Germany and her co-workers have now demonstrated a novel method of laser spectroscopy that can analyse the ionisation potential of neptunium more precisely than earlier methods. This work is now published in the journal EPJ D.


EPJ H Highlight - Quantum Gravity, Effective Field Theory, and Strings


A historical overview of different approaches to the quantum theory of gravitation from the early twentieth century shows how they have been combined to set our modern view of a unified ‘theory of everything’.

Gravity is one of four fundamental interactions. The most precise description of this force is still provided by Einstein’s General Theory of Relativity, published in 1915, an entirely classical theory. This description sets gravity apart from the other three forces - strong, weak, and electromagnetism - all described by quantum fields. Therefore, any attempt to unify the four forces must depend on a description of gravity that uses the principles of quantum mechanics. This has been an active area of theoretical physics since the 1930s. A historian and a physicist, Alessio Rocci from VUB in Brussels and Thomas Van Riet from KU Leuven in Belgium have set out a historical overview of the development of quantum theories of gravity to explain our current view on a future unified theory of the four forces. This work has now been published in the journal EPJ H: Historical Perspectives on Contemporary Physics.


EPJ Plus Highlight - A guide for early-career researchers in computational science

A navigable guide for graduate students. Credit: ErrantScience

A new article offers a valuable guide for new graduate students starting out their careers in computational science.

In recent years, a growing number of students have embraced scientific computation as an integral component of their graduate research. Yet since many of them are new to the field, they often have little to no coding experience, or any prior knowledge of computational tools. For many students starting out in the field, this can seem daunting, and leaves them unsure of where to start.

In a new article published in EPJ Plus, a team led by Idil Ismail, a current graduate student at the University of Warwick, UK, present an introductory guide to the field for researchers embarking on new careers. The team's work will help new graduate students to navigate the complexities of scientific computation science as they begin their journey in computational science research and could ultimately help the wider field to become more transparent and inclusive.


Konstantinos Bachas joins the EPJ Scientific Advisory Committee (SAC)

Konstantinos Bachas

The Scientific Advisory Committee of EPJ is delighted to welcome Professor Konstantinos Bachas, as the new representative for the Hellenic Physical Society.

Konstantinos (Dinos) Bachas is an Associate Professor at the University of Thessaly in Greece, specializing in experimental high energy physics. His research focuses on topics related to the physics of the LHC at CERN and the ATLAS experiment. These include searches for new physics using advanced statistical methods, Standard Model measurements mainly in diboson production channels, and various simulation and reconstruction tasks for the ATLAS Muon Spectrometer. In recent years, his experimental efforts have involved the use of machine learning techniques for analyzing high energy physics data, exploring searches for hypothetical resonances, and searching for new physics within the context of Effective Field Theories.

Outside of his research, Professor Bachas is dedicated to education and outreach, having taught a wide range of courses from accelerators and detectors in nuclear and particle physics to the experimental foundations of elementary particle physics.

Managing Editors
Sandrine Karpe and Vijala Kiruvanayagam (EDP Sciences) and Sabine Lehr (Springer-Verlag)
Dear Sabine,
On this occasion, may I also thank you for your support: collaboration with you is always very pleasant and effective. Have a nice day, yours, Yurij

Yurij Holovatch, National Academy of Sciences, Lviv, Ukraine
Editor EPJ Special Topics 216, 2013

ISSN: 1951-6355 (Print Edition)
ISSN: 1951-6401 (Electronic Edition)

© EDP Sciences and Springer-Verlag