Category Archives: Quantum physics
A family of degradable fermionic Gaussian channels
Quantum computing is the future. Or the present, if you believe that some real quantum computers are commercially available already. Because it is hard to admit that any computer system whose design and theoretical basis depend on quantum effects […]
Extreme decoherence in chaotic quantum systems
In physics there are some well-known fictional characters: the experimenters Alice & Bob, Maxwell’s and Laplace’s demons, or some astronauts travelling at incredible speeds, to name a few. But the queen of them all is a cat. Yes, you guess […]
A photonic crystal the size of a single free space wavelength
You can read this article because I have used photonics in order to make it possible. It may sound futuristic, but photonics is a technology we use, one way or the other, on a daily basis. Photonic devices are analogous […]
Detection of the reversal of magnetic moments in an antiferromagnet
Some metals, alloys and transition-element salts exhibit a form of magnetism called antiferromagnetism. This occurs below a certain temperature, named after Louis Néel, when an ordered array of atomic magnetic moments spontaneously forms in which alternate moments have opposite directions. […]
Polariton anomalous Hall effect in transition-metal dichalcogenides
Two-dimensional materials, such as transition-metal dichalcogenides embedded in optical cavities, stand out as an excellent platform where strong light-matter interactions can be studied. Moreover, their band structures bring about nontrivial topological features, including the possibility of inducing some really […]
The protective effect of symmetry in entangled photonic states
One of the most mysterious features of quantum mechanics is that if two particles (or photons) interact at some point in time then the properties of these particles will remain connected at future times. A consequence of this is that […]
Origin of the mysterious blue fluorescence of polymer carbon dots
A quantum dot is a nanometric crystalline structure of semiconductor materials. In a quatum dot electrons are confined in a region of space, thus creating a well defined structure of energy levels that depends very much on the size and […]
Nonequilibrium effects in hybrids of electron systems with spontaneously broken symmetries
Imagine a military regiment in formation. That we will call symmetry. Now imagine the same regiment when it is dismissed by the commanding officer: at once the soldiers disperse and tend to form domains (groups) or pairs. Hence, we can […]
Unlocking graphene’s spintronic potential through spin-valley coupling
Author: José H. García is a postdoctoral researcher at the Catalan Institute of Nanoscience and Nanotechnology (ICN2).
Few materials have drawn as much attention as graphene, it fascinating attributes such as one-atom thickness and relativistic electrons, and its technological properties […]
A route to the directional control of light–matter interactions at the nanoscale
Mobile phones and computers are currently responsible for up to 8% of the electricity use in the world. This figure has been doubling each past decade but nothing prevents it from skyrocketing in the future. Unless we find a way […]