Category archives: Theoretical physics

The geometry of String Theory compactifications (I): the basics.

The geometry of String Theory compactifications (I): the basics.

PhysicsTheoretical physics

By Carlos Shahbazi

This is first of a series of notes on the geometry of String Theory compactifications. The space-time in String Theory is often described by means of a mathematical object called manifold . Manifolds are very important objects from the mathematical and the physics point of view, not only in String Theory. For example, differential geometry […]

How to measure tiny temperature differences using a Josephson junction

How to measure tiny temperature differences using a Josephson junction

Condensed matterMaterialsPhysicsQuantum physicsTheoretical physics

By DIPC

At low temperatures, the resistivity of a metal (the inverse of its conductivity) is nearly constant. As the temperature of a material is lowered and as we approach absolute zero the resistivity should approach a constant value. Many metals, known as normal metals, behave in this way. The behaviour of another class of metals and […]

Unveiling the origin of the record superconductivity

Unveiling the origin of the record superconductivity

Condensed matterMaterialsPhysicsTheoretical physics

By Ion Errea

Achieving room temperature superconductivity is among the most pursued but elusive goals of scientists. A paper uploaded to the arXiv in December 2014 claims to have observed superconductivity as high as 190 K in hydrogen sulfide at high pressure, breaking all the records thus far. If this observation is confirmed, cuprates will be knocked from […]

Supergravities

Supergravities

PhysicsTheoretical physics

By Invited Researcher

Although pretty much unknown for the public audience, Supergravity theories play an important role in modern Theoretical Physics, specially for the particle physics and (Super)String Theory communities . Loosely speaking, Supergravity is a theory that describes gravity along with other fundamental particles and interactions in such a way that the whole structure is symmetric under […]