Most downloaded papers of 2015

As Rebecca discussed in her Friday post What are we looking forward to in 2016?, it’s been rather a successful year for the Journal of Physics series of journals, and there’s much to look forward to in 2016. But what were JPhys readers downloading in 2015? Let’s have a look for each of the journals.


First up is a popular Topical Review, Johannes M Henn’s “Lectures on differential equations for Feynman integrals” in which he discusses developments in computation of Feynman integrals using differential equations (DE). Of particular note is the fact this review assumes no prior knowledge of the subject as well as outlining a number of approaches for Feynman integrals and DEs.

Evolution of the total density N(t) and the monomer density in the mass exchange process with product kernel and homogeneous input from P L Krapivsky 2015 J. Phys. A: Math. Theor. 48 205003P L Krapivsky’s research paper “Mass exchange processes with input” also proved well-read. Krapivsky investigates a system of interacting clusters which evolve through mass exchange, looking specifically at localized input, which, it turns out, is simpler than homogeneous input.


simulations of the classical stochastic equations from A Mari et al 2015 J. Phys. B: At. Mol. Opt. Phys. 48 175501Many were interested in A Mari et al‘s study of quantum optomechanical piston engines, in which two different models are examined. A temperature gradient induces oscillations of a mechanical resonator. Thermodynamically-speaking, these can be viewed as nanoscale analogues of macroscopic piston engines. Who doesn’t like the sound of that?! The models can be applied in energy-efficient nanotechnology as well as laboratory testing.

We couldn’t have this post without featuring some lasers of some description (my favourite!) and in this Fast Track Communication, D Dimitrovski et al show experimentally and theoretically how circularly polarized laser pulses can create the presence of low-energy photoelectrons in naphthalene molecules. The results highlight the importance of the dipole induced in the molecular cation in order to create such low-energy electrons.


In their paper “The physical size of transcription factors is key to transcriptional regulation in chromatin domains”, Kazuhiro Maeshima et al employed Monte Carlo simulations to determine the physical size limit of DNA transcription factors which can enter domains of chromatin in order to read the genetic information stored therein. The results have implications for various DNA transaction mechanisms including DNA replication and repair/combination. You can also learn more about the research in this LabTalk: Why are transcription factors so large?

 'Buoy' model for transcriptional regulation from Kazuhiro Maeshima et al 2015 J. Phys.: Condens. Matter 27 064116

Topical Reviews are some of JPCM’s most popular content. In 2015 this included Xu Liu et al‘s review of FeSe superconductors which have attracted a lot of attention due to the simple crystal structure and unusual electronic and physical properties of these iron-based superconductors. This review covers investigation of these superconductors; their electronic structure and conductivity, with a particular focus on FeSe films.


The 2015 super-resolution microscopy roadmap

Back in October, JPhysD published The 2015 super-resolution microscopy roadmap by Stefan W Hell et al: an article comprising fifteen two-page sections written by an expert — including Nobel Laureate Stefan Hell — each describing a particular approach, or an aspect of an approach, to super-resolution microscopy. You can also read more about The 2015 super-resolution microscopy roadmap on JPhys+.

John Timmerwilke et al detail steps in the development of a new magnetic memory technology: using the magnetic permeability to store large amounts of information, reliably and in a high-density form, for decades. In addition, this technology is insensitive to accidental exposure to magnetic fields or temperature changes, thus avoiding corruption. They also discuss how a variant of heat assisted magnetic recording (HAMR) can be used to economically write and read bits as small as 20nm.


Chart of presently (2015) known nuclei from Sigurd Hofmann 2015 J. Phys. G: Nucl. Part. Phys. 42 114001Topping the list for JPhysG is a paper from a focus issue on 40 years of research in the journal: Sigurd Hofman’s “Super-heavy nuclei” which examines the experimental work undertaken to identify and produce super-heavy nuclei (SHN). Hofman compares the experimental results to theoretical predictions and interpretations, and finishes with an outlook for this research area.

Also popular in JPhysG was a research paper numerically investigating muon-neutron and anti-muon-neutrino quasi-elastic scattering from 12C and the in-medium effect. Myung-Ki Cheoun et al compare their results with (neutrino oscillation magnetic detector) NOMAD experimental data and are able to explain most of these data using the density-dependent elementary process.

CC-BY logo This work is licensed under a Creative Commons Attribution 3.0 Unported License.

  1. JPhysA image from P L Krapivsky 2015 J. Phys. A: Math. Theor. 48 205003
  2. JPhysB image from A Mari et al 2015 J. Phys. B: At. Mol. Opt. Phys. 48 175501
  3. JPCM image adapted from Kazuhiro Maeshima et al 2015 J. Phys.: Condens. Matter 27 064116
  4. JPhysD image adapted from Stefan W Hell et al 2015 J. Phys. D: Appl. Phys. 48 443001
  5. JPhysG image from Sigurd Hofmann 2015 J. Phys. G: Nucl. Part. Phys. 42 114001

All copyright IOP Publishing 2015.

Categories: Journal of Physics A: Mathematical and Theoretical, Journal of Physics B: Atomic, Journal of Physics B: Atomic, Molecular and Optical Physics, Journal of Physics D: Applied Physics, Journal of Physics G: Nuclear and Particle Physics, Journal of Physics: Condensed Matter, JPhys+

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