| Volume 94, Issue 4 (partial) October - December 2022  | On the Cover Ultrastrong electromagnetic fields occur not only in astrophysical settings but also in dense lepton bunches, special crystals, and at the focus of high peak power lasers. For fields of sufficient magnitude including quantum electrodynamics effects becomes essential. Electron-positron pair creation and interaction of these pairs with the fields results in fascinating phenomena. In this review these particle dynamics are analyzed and shown to exhibit complex behavior including chaotic motion with strange attractors and limit cycles, as well as cascades where the vacuum "explodes" and acts back on the strong fields. An overview of planned experiments points to new discoveries which will challenge long-held theoretical expectations. From the article Charged particle motion and radiation in strong electromagnetic fields
A. Gonoskov, T. G. Blackburn, M. Marklund, and S. S. Bulanov
Rev. Mod. Phys. 94, 045001 (2022) | | | | Advertisement | APS is pleased to announce the launch of the newest Physical Review title, PRX Life, a high impact, fully open access journal dedicated to publishing outstanding research at all scales of biological organization. As the first interdisciplinary journal focused exclusively on quantitative biological research, PRX Life aims to catalyze discoveries that advance our understanding of living systems by publishing research articles, perspectives, reviews, and tutorials by and for scientists working at the interface of physics and biology. Learn more and sign up for alerts » | | | | |
Advertisement | Early bird registration is officially open for March Meeting 2023–one of the largest and most exciting conferences in physics! Witness groundbreaking physics research, network with potential employers, and prepare for career success at March Meeting 2023. Register today » | | | | | | Not an APS member? Join today to start connecting with a community of more than 50,000 physicists. | | | | Jessica Thomas and Michael Thoennessen Rev. Mod. Phys. 94, 040001 (2022) – Published 11 October 2022 | | | Luigi Amico, Dana Anderson, Malcolm Boshier, Jean-Philippe Brantut, Leong-Chuan Kwek, Anna Minguzzi, and Wolf von Klitzing Rev. Mod. Phys. 94, 041001 (2022) – Published 18 November 2022  | Atomtronics refers to the use of ultracold atoms for building circuits that rely on the coherent propagation of matter waves in waveguides. While still in its infancy, this new quantum technology is promising both for applications and for probing the correlated atomic matter itself. This Colloquium explains the current state of the field and discusses possible applications. | | | | | | Sean A. Hartnoll and Andrew P. Mackenzie Rev. Mod. Phys. 94, 041002 (2022) – Published 30 November 2022  | Relaxational processes for conduction electrons in metals come with characteristic temperature dependences; classic examples at low temperatures are the 1/T2 law for the relaxation time in a Fermi liquid, and the Bloch 1/T5 law for electron-phonon scattering. The strange metal phase of cuprate superconductors is governed instead by the Planckian time, which is given in terms of fundamental constants only. This Colloquium discusses the concept of such a fundamental timescale and the degree to which it provides a lower bound for relaxation times, and illustrates these ideas with examples from conventional and unconventional metals. | | | | | | A. Gonoskov, T. G. Blackburn, M. Marklund, and S. S. Bulanov Rev. Mod. Phys. 94, 045001 (2022) – Published 7 October 2022  | Ultrastrong electromagnetic fields occur not only in astrophysical settings but also in dense lepton bunches, special crystals, and at the focus of high peak power lasers. For fields of sufficient magnitude including quantum electrodynamics effects becomes essential. Electron-positron pair creation and interaction of these pairs with the fields results in fascinating phenomena. In this review these particle dynamics are analyzed and shown to exhibit complex behavior including chaotic motion with strange attractors and limit cycles, as well as cascades where the vacuum "explodes" and acts back on the strong fields. An overview of planned experiments points to new discoveries which will challenge long-held theoretical expectations. | | | | | | Cang Zhao, Bo Shi, Shuailei Chen, Dong Du, Tao Sun, Brian J. Simonds, Kamel Fezzaa, and Anthony D. Rollett Rev. Mod. Phys. 94, 045002 (2022) – Published 20 October 2022  | Additive manufacturing, called 3D printing, has become ubiquitous in classrooms, laboratories, and research centers. While printing with plastics has revolutionized prototyping and modeling, it is now possible to fabricate metal parts and devices directly from computer models by fusing metal particles together with high-intensity lasers. This review focusses on the flow of heat and material in the high temperature environment, the instabilities that arise, and the tools to control them. | | | | | | Adam Stokes and Ahsan Nazir Rev. Mod. Phys. 94, 045003 (2022) – Published 3 November 2022  | This article reviews the meaning of gauge freedom in quantum electrodynamics and emphasizes its consistency with examples and analyses. It thus demonstrates that ambiguities and recent controversies are resolved by proper identification of physically relevant observables of field and matter subsystems. Since these observables differ for different gauges, light and matter subsystems can only be defined relative to the choice of gauge, with implications for the identification of effective few-dimensional models, entanglement, phase transitions, and cavity quantum electrodynamics effects beyond weak-coupling regimes. | | | | | | | |
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