News

EPJ C Topical Issue on New frontiers in holographic duality: From quantum complexity and black holes to hydrodynamics and neutron stars

Guest Editor: Ayan Mukhopadhyay

Over the last 25 years, holographic duality has revolutionised our understanding of gauge theories, quantum many-body systems and also quantum black holes. This topical issue is a collection of review articles on recent advances in fundamentals of holographic duality and its applications with special focus on a few areas where it is inter-disciplinary to a large measure. The aim is to provide a sufficient background on relevant phenomenology and other theoretical areas such as quantum information theory to researchers whose primary expertise is in quantum fields, strings and gravity, and also the necessary concepts and methods of holography to researchers in other fields, so that these recent developments could be grasped and hopefully further developed by a wider community.

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Slobodan Žumer joins the EPJ Scientific Advisory Committee (SAC)

Slobodan Žumer

The Scientific Advisory Committee of EPJ is delighted to welcome Professor Slobodan Žumer, who has been an Editor for EPJ E for many years, as the new representative for the Society of Mathematicians, Physicists and Astronomers of Slovenia.

Slobodan Žumer is a professor of physics (University of Ljubljana) and a scientific adviser (Jozef Stefan Institute). He was the president of the International Liquid Crystal Society and is its Honored Member and recipient of the Pierre Gilles de Gennes ILCS Prize. He is an APS Fellow, an APS Outstanding Referee, and a European Academy of Sciences and Arts member. His interests are modeling, simulations, & theory of topological soft matter including liquid crystals, polymers, nematic elastomers, composites, colloids, active systems, and their use in optics & photonics.

EPJ Plus Focus Point on Advances in Photonics for Heritage Science: Developments, Applications and Case Studies

Guest Editors: Daniela Comelli, Austin Nevin & Gianluca Valentini

Photonics is the science of light and is considered one of the key enabling technologies for innovation in all industries. New photonic applications are emerging in various fields, such as environmental monitoring and medicine. The same technological innovation is being adopted in the field of heritage science, where photonics is the foundation for the application of a range of non-invasive, non-contact, and often portable devices for studying works of art and artistic materials.

In this Focus Point on “Advances in Photonics for Heritage Science: Developments, Applications and Case Studies”, the guest editors have selected seventeen papers that present a range of optical and photonics-based techniques, highlighting their advantages and limitations, as well as current and future applications to study our heritage.

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EPJ Plus Highlight - How advanced optical tweezers revolutionized cell manipulation

A ‘tug of war’ set of optical tweezers — separated beams of light that can trap bacterium. Credit: Hu. S., et al, [2022]

A new review looks at devices called optical tweezers and how they are used to better uncover the natural secrets of human life at the single-cell level.

Optical tweezers (OTs), also known as optical traps, are highly focused laser beams that can be used to trap and manipulate microscopic objects with a noncontact force. Employed in a wide range of nano and micro-scale operations, OTs have become particularly useful in the manipulation of biological objects including human cells.

A new review published in EPJ Plus conveys the latest achievements in OTs over recent decades. The review is authored by researchers from the College of Information Science and Engineering, Northeastern University, Shenyang, China — Sheng Hu, Jun-yan Ye, Yong Zhao and Cheng-Liang Zhu .

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EPJ E Topical Issue on Thermal Non-Equilibrium Phenomena in Fluid Mixtures

When a temperature difference, or gradient, is applied over a bulk fluid mixture at equilibrium, the phenomenon known as thermodiffusion, or the Ludwig-Soret effect, may occur. The thermal force will in general cause the components in the mixture to migrate until the thermal force is balanced by concentration gradients. If the thermal force is applied to a colloidal suspension, the colloids drift towards cold or hot regions. This phenomenon is commonly referred to as thermophoresis. If the fluid is soaked in a porous medium, an additional effect known as thermos-osmosis may occur. Thermo-osmosis leads to a pressure difference. These effects are different from normal diffusion and osmosis, where a concentration difference is the driving force.

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EPJ Quantum Technology: New Review Article The Deep Space Quantum Link (DSQL)

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A new review lays out a roadmap for quantum technologies. Credit: Robert Lea

Space-based quantum optical links support future networking applications for quantum sensing, quantum communications, and quantum information science. In addition, such links enable new scientific experiments impossible to reach in terrestrial experiments. The Deep Space Quantum Link (DSQL) is a spacecraft mission concept that aims to use extremely long-baseline quantum optical links to test fundamental quantum physics in novel special and general relativistic regimes.

In a new Review article just published in EPJ Quantum Technology, an international author team provide an overview of a two-year long study of how quantum optics in space could be used to conduct new tests of fundamental physics, in compliment to proposed tests utilizing matter or clocks. The manuscript describes the findings of the NASA-funded study, and describes some of the technology requirements and outstanding mission design studies necessary to move forward with the mission.

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EPJ D Colloquium - Electron scattering processes: fundamentals, challenges, advances, and opportunities

Artistic view of the electron scattering process

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.

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EPJD supports public lecture by Nobel Laureate William D Phillips

William D Phillips

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 link https://www.youtube.com/watch?v=rgErE2FXCgI
on October 4th 2022
6pm EEST / 5pm CET / 4pm BST / 9am EDT

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EPJ ST Highlight - Elastic nozzles could create more stable liquid jets

Liquid jets breaking up.

New experiments show that nozzles which deform as liquid flows through them could help to improve the stability of liquid jets in many different scenarios

When a liquid jet is squirted through a nozzle, it will eventually break up into a string of droplets. Through previous studies, researchers determined that the distance from the nozzle where this breakup occurs depends on a wide range of factors: including the nozzle’s shape, and the movement of air surrounding the jet. So far, however, little attention has been paid to elastic nozzles, which can deform as liquids pass through them. Through new research published in EPJ ST, a team led by Andrew Dickerson at the University of Tennessee, USA, introduces the concept of passively-deforming nozzles, and shows that softer nozzle materials can produce more stable jets across a wide range of flow rates.

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Johan Åkerman joins the EPJ Scientific Advisory Committee (SAC)

Johan Åkerman

The Scientific Advisory Committee of EPJ is delighted to welcome Dr. Johan Åkerman as the new representative for the Swedish Physical Society.

Johan Åkerman is the head of the Applied Spintronics Group at the Physics Department of University of Gothenburg. His expertise is in spintronic devices, such as magnetic tunnel junctions and MRAM, and more recently with spin torque and spin Hall nano-oscillators for microwave and spin wave signal generation, neuromorphic computing, and Ising Machines. He is one of the founding members of the Global Young Academy and the Swedish Young Academy, a fellow of the American Physical Society, and a member of the Royal Swedish Academy of Engineering Sciences.

Editors-in-Chief
Pere Roca i Cabarrocas
and Jean-Louis Lazzari
ISSN: 2105-0716 (Electronic Edition)

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