Category Archives: Quantum physics
How chirality information can transfer over long distances
Usually, optical activity is understood as the ability some substances have to change the handedness of polarized light when it goes through them. Molecules that show optical activity have no plane of symmetry. The commonest case of this is in […]
Metal atoms enhance quantum dot coupling in metal-organic nanoporous networks
A quantum dot (QD) is a nanometric crystalline structure of semiconductor materials. In a QD electrons are confined in a region of space, thus creating a well defined structure of energy levels that depends very much on the size […]
Quantum atomic fluctuations stabilize the crystal responsible for superconductivity at 250 K
Achieving room temperature superconductivity is among the most pursued but elusive goals of scientists. In December 2014 researchers claimed to have observed superconductivity as high as 200 K in hydrogen sulfide at high pressure, breaking all the records thus […]
A local quantum emitter can be used to sense the environment of a molecule with the minimal quantum of energy
Plasmonic nanostructures confine light to dimensions far smaller than the free-space wavelength, as they mix optical fields with electronic excitations. It was not until the 1990s, with the appearance of accurate and reliable nanofabrication techniques, that plasmonics blossomed. It […]
First ever antiferromagnetic topological insulator discovered
Topological insulators are materials with special universal properties, which are protected against perturbations. Such properties are theoretically described by topology, a branch of mathematics concerned with the properties of geometrical objects that are unchanged by continuous deformations. Topological insulators are […]
Next generation nanoprobes for the microspectroscopic study of biosystems
Nonlinear processes are attractive in microscopy and spectroscopy since they can be excited with light in the near‐infrared, which offers several advantages, from a deep tissue penetration capability or a reduced photodamage due to the lower photon energy, to a […]
Atomic-scale spin sensing with a single molecule
Scanning tunneling microscopy (STM) is a technique in which a fine conducting probe is held close to the surface of a sample. Electrons tunnel between the sample and the probe, producing an electrical signal. The probe is slowly moved across […]
Quantum physics: our study suggests objective reality doesn’t exist
Authors: Alessandro Fedrizzi is professor of quantum physics and Massimiliano Proietti is a PhD candidate in quantum physics at Heriot-Watt University Gearoid Hayes/Flickr, CC BY-SA
Alternative facts are spreading like a virus across society. Now it seems they […]
A theory of spin hall magnetoresistance to study magnetism at interfaces
The interactions between moving charges and magnetic fields can be quite complicated; more if we consider the quantum effects. One example is the collection of Hall effects.
Imagine that we have a conductor or a semiconductor through which a current […]
Spin chains on surfaces, a thriving field of research
A collection of local magnetic moments arranged in a linear fashion that interact via some spin-spin coupling is generally known as a spin chain. This seemingly simple object is one of the most complex and rich physical systems that […]