Simulation – JPhys+

Image of the week: strong fields with optical waveguides

By Thomas Farrell on May 15, 2017

Showing that strong-field physics can be simulated using an optical waveguide.

A vector plot of the function (10) from the JPhysD article Spin-transfer-driven oscillations of the magnetic quasi-vortex in a dot with crystalline cubic anisotropy Andrzej Janutka and Przemysław Gawroński 2017 J. Phys. D: Appl. Phys. 50 145003, overlapped with a density plot of function (13) for arbitrary parameters. © IOP Publishing, All Rights Reserved.

Image of the week: The oscillatory magnetization dynamics of a vortex-containing nanodot

By Dean Williams on May 3, 2017

This week’s image of the week is a vector plot of the function (10) from the JPhysD article Spin-transfer-driven oscillations of the magnetic quasi-vortex in a dot with crystalline cubic anisotropy Andrzej Janutka and Przemysław Gawroński 2017 J. Phys. D:… Read More ›

Complex light from a photonic chip

By Thomas Farrell on April 28, 2017

A new method to generate complex light beams from integrated-optics circuits is theoretically investigated in a new paper by Andrea Crespi and Francesca Bragheri

$Proposed experimental setup for simulating quantum spin models in atomic ensembles confined in a microtrap array. Two spin states $| \,\downarrow \,\rangle $ and $| \,\uparrow \,\rangle $ are encoded in a single two-step excitation to the Rydberg state $| {n}_{\downarrow }S\rangle $ or $| {n}_{\uparrow }S\rangle $, shared amongst all atoms in an ensemble. The spatial extent of each ensemble is ℓ, the on-site blockade radius is rc and the lattice spacing is a, with $a\gtrsim {r}_{c}\gg {\ell }$. The inset shows the internal level structure of a single atom with the states involved in the detection processes marked with dashed lines. General spin–spin interactions occur via long-range van der Waals interactions between the $| {n}_{\downarrow }S\rangle $ and $| {n}_{\uparrow }S\rangle $ states.$

Image of the Week: simulating quantum spin models in microtraps

By Thomas Farrell on April 18, 2017

A new way of simulating lattice spin models using ultracold Rydberg atoms

Soaked to the skin: tuning ionic liquids for electrochemical devices

By Tom Sharp on October 28, 2016

A recent Journal of Physics: Condensed Matter letter sheds light on the structure of the electrified interface in mixtures of contaminated ionic liquids

Three-dimensional view of condensate density with vortex lattices of purely dipolar BECs with varying rotation frequencies.

Image of the Week: 3D vortices in BECs

By Thomas Farrell on September 6, 2016

Image of the week 05/09/16

Image of the Week: trilobites

By Thomas Farrell on August 15, 2016

Image of the Week 15/08/16

Image of the Week: stars and trajectories

By Thomas Farrell on August 10, 2016

This week’s Image of the Week comes from a recent JPhysA paper, Dynamics of trapped interacting vortices in Bose–Einstein condensates: a role of breathing degree of freedom. Researchers from National University of Uzbekistan, Osaka City University, Turin Polytechnic University in… Read More ›

Interfacial energy-bending within organic semiconductors

By Tom Sharp on July 28, 2016

The validity of the electrostatic model at interfaces is tested.

Shown schematically here is a particle traversing a pixel layer from the lower left and decaying before the next layer, causing multiple hits to appear. For this technique to be effective the particle should decay into many daughter particles. B hadrons have this property. Shown schematically here is a particle traversing a pixel layer from the lower left and decaying before the next layer, causing multiple hits to appear. For this technique to be effective the particle should decay into many daughter particles. B hadrons have this property.Shown schematically here is a particle traversing a pixel layer from the lower left and decaying before the next layer, causing multiple hits to appear. For this technique to be effective the particle should decay into many daughter particles. B hadrons have this property. © IOP Publishing, All Rights Reserved

Finding ultra-high energy B-hadrons in high energy physics

By Colin Adcock on July 1, 2016

Professor Todd Huffman tells us about a new technique that could dramatically, and simply, increase the sensitivity of ATLAS detectors to B hadrons.

The formation of a 'knotted' tube from an unknotted tube. Pulling on the ends would lead to a knotted ribbon

Image of the week: getting in a tangle

By Thomas Farrell on May 16, 2016

Modelling twisted ribbons.

Animal abstract: predator (blue cross) and prey (red dots) on a square lattice. J. Phys. A: Math. Theor. 49 225601.

Theoretical tiger chases statistical sheep to probe immune system behaviour

By Thomas Farrell on May 4, 2016

Physicists update predator–prey model for more clues on how bacteria evade attack from killer cells

Image of the week: molecular butterflies

By Thomas Farrell on March 22, 2016

A butterfly the size of a molecule?

Full size cubic MD simulation box with reactant and solvent.

Image of the week: particles in a box

By Thomas Farrell on December 1, 2015

To be able to control chemical reactions on a quantum level holds huge potential for redesigning chemical synthesis and a host of other applications. An established way of doing this is through the use of laser pulses interacting with molecules. … Read More ›