Category archives: Theoretical physics

A Talbot carpet of electrons in nanoporous graphene

A Talbot carpet of electrons in nanoporous graphene

Condensed matterMaterialsNanotechnologyQuantum physicsTheoretical physics

By DIPC

Controlling electron waves by harnessing phase-coherence and interference effects is a cornerstone for future nanoelectronics or quantum computing. To this end, design of platforms with well-defined, narrow, and low-loss propagation channels is essential. Nanoporous graphene (NPG) holds great potential for distributing and controlling currents on the nanoscale. But the effects derived from the wave nature […]

The Road to Quantum Gravity (2):  The emergence of Space and Time

The Road to Quantum Gravity (2): The emergence of Space and Time

CosmologyHistoryTheoretical physics

By Daniel Fernández

The division of past and future In Part 1 of this series, we presented the empirical fact that under extreme circumstances, a certain observer’s past can be in another observer’s future. To explain this, we introduced the network of cause and consequence relations as the fixed background structure of reality. This network constitutes Spacetime. Causality […]

The road to quantum gravity (1):  Spacetime as the network of causality

The road to quantum gravity (1): Spacetime as the network of causality

CosmologyHistoryTheoretical physics

By Daniel Fernández

Observations vs intuitions Einstein’s Theory of Relativity introduced us to the concept of Spacetime, as a unified entity. This stands in contrast with the intuition that we develop since birth, which leads to naturally separate space and time. Human intuition is a way to understand how the world works, our brain processes our daily experiences […]

The role of core electrons in the electronic stopping power of heavy ions

The role of core electrons in the electronic stopping power of heavy ions

Condensed matterMaterialsPhysicsTheoretical physics

By DIPC

Spacecraft components potentially exposed to different ionic projectiles in space, new materials used in new energy systems or healthy tissues exposed to cancer therapies are all instances where a full comprehension of how the energy of the incoming ions is dissipated by the matter in the target is of paramount importance. Besides, the dissipative processes […]

Topology of disconnected elementary band representations

Topology of disconnected elementary band representations

Condensed matterMaterialsPhysicsQuantum physicsTheoretical physics

By DIPC

The revolutionary theory of topological quantum chemistry , a description of the universal global properties of all possible band structures and materials, diagnoses topological phases based on elementary band representations. A set of bands is topological if it lacks an “atomic limit” that obeys the crystal symmetry (and time reversal, if desired): formally, an atomic […]

Surface-Enhanced Molecular Electron Energy Loss Spectroscopy

Surface-Enhanced Molecular Electron Energy Loss Spectroscopy

Condensed matterMaterialsNanotechnologyPhysicsQuantum physicsTheoretical physics

By DIPC

Chemists have a range of different spectroscopic techniques to study organic molecules. All of these techniques are based on spectra generated by a range of electronic transitions and vibrations, key excitations in matter, the study of which provides information about characteristics of materials and, therefore, allow their identification. In this context, one of those spectroscopic […]

HOTI bismuth

HOTI bismuth

Condensed matterMaterialsNanotechnologyPhysicsQuantum physicsTheoretical physics

By DIPC

The properties of bismuth have long defied classification, placing it in a category of its own. Now, as if it was not enough, it turns out its electronic structure has higher-order topology. This has been shown by an international team with the participation of Maia G. Vergniory (DIPC, Ikerbasque, UPV/EHU) and coordinated by Titus Neupert […]

The microscopic mechanism behind the vibrational relaxation of adsorbates on metal surfaces

The microscopic mechanism behind the vibrational relaxation of adsorbates on metal surfaces

Condensed matterMaterialsNanotechnologyPhysicsTheoretical physics

By DIPC

Most of the theories describing dynamical processes at surfaces rely on the validity of the adiabatic Born-Oppenheimer approximation. What does this mean? We have already seen that adsorption commonly is understood as the reversible binding of molecules and atoms from the gaseous or liquid phase on surfaces, mostly of highly porous adsorbent media. In chemisorption […]

Has theoretical physics become a sleeping beauty?

Has theoretical physics become a sleeping beauty?

Philosophy of scienceTheoretical physics

By Jesús Zamora Bonilla

The progress that physics experienced during the 20th century was probably one of the greatest and most everlasting successes of the humankind. Discovering the hidden and minute composition of matter and energy, as well as realising that the rules they obey are as further from common sense as quantum theory has revealed, are amongst the […]