EPJ

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The European Physical Journal (EPJ) is a series of peer-reviewed journals covering the whole spectrum of physics and related interdisciplinary subjects. EPJ is committed to high scientific quality in publishing and is indexed in all main citation databases.

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EPJ A Topical Collection: Heavy and Super-Heavy Nuclei and Elements: Production and Properties

Details: Published on 12 May 2025

Guest Editors: Nicolas Alamanos, Maria José Garcia Borge, Sigurd Hofmann, Peter Möller, Andrey G. Popeko

Interest in the possible existence of elements (SuperHeavy Elements, SHE) at the next doubly-magic numbers beyond ²⁰⁸₈₂Pb₁₂₆, sufficiently stable to allow experimental studies of their properties, has been around since at least the 1950ies. In analogy with the magic neutron number 126 it was assumed that the next magic proton number would be Z = 126. However in the mid sixties it was realized that already available, calculated single-particle diagrams showed that Z = 114 would be a more plausible next magic proton number. This realization, the advent of the Strutinsky method, and improving experimental facilities led to many theoretical studies of SHE properties and to experimental efforts to form those. However in the next 15 years or so only a very few new elements (up to Z = 106) were discovered, none near the postulated island of stability. In a Nature article in 1979 Hermann reviewed the status and presented a somewhat bleak view of future prospects. Others had even remarked that the earlier Nobel symposium 27 in 1974 seemed to be the funeral services for SHE.

EPJ QT Highlight - Progress in terrestrial very long baseline atom interferometry

Details: Published on 12 May 2025

alt — Atom interferometers (here labelled AION, AEDGE and AEDGE+) fill a crucial frequency gap in gravitational wave detection, in the deci-Herz range.

The second of a series of workshops, held in London in April 2024, saw over 250 experts make progress towards a blueprint for a kilometre-long atom interferometer.

Interferometry is a technique that extracts information from the interference patterns of superimposed waves, most typically electromagnetic waves. However, atom interferometry, as its name implies, instead uses atoms that are treated as waves through wave-particle duality. Atom interferometers can make exceptionally precise measurements, for example to test foundational physical principles or detect gravitational waves. This decade, international experts in terrestrial very long baseline atom interferometry (TVLBAI) have met for two workshops; progress reported at the second of these, held in London in April 2024, has recently been published in EPJ Quantum Technology.

EPJ E Topical Issue: Charged Species in Bulk and at Interfaces: Interaction, Mobility, Transport, and Regulation

Details: Published on 06 May 2025

Guest Editors: Emanuela Bianchi, Jan K.G. Dhont, Gerhard Kahl, Kyongok Kang and Holger Stark.

The topical issue titled “Charged Species in Bulk and at Interfaces: Interaction, Mobility, Transport, and Regulation” is derived from a series of three CECAM workshops held in 2016, 2018, and 2022. The aim of this issue is to advance our understanding of the complex phenomena surrounding charged species in various environments from a fundamental perspective, with some excursions into practical applications. The issue addresses the characterization of the interactions between a broad variety of charged species as well as of the complex macroscopic behaviour arising from these interactions. Modelling pair interactions between highly charged macromolecules and surfaces resulting from (possibly mobile) charges presents significant challenges; equally challenging is understanding how these interactions govern self-assembly, assembly kinetics, transport in dense systems, response to external electric fields, and regulatory mechanisms. In particular, the transport of charged species, both in bulk and at interfaces, has garnered significant attention due to its fundamental and technological implications. The role of electrostatics and dynamics in biological systems – spanning a wide range of length scales has become a rapidly growing area of research.