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Zero-point energy (ZPE) is the lowest possible energy that a quantum mechanical system may have. Unlike in classical mechanics, quantum systems constantly...

Hans Albrecht Bethe ForMemRS (German: [ˈhans ˈbeːtə] ; July 2, 1906 – March 6, 2005) was a German-American theoretical physicist who made major contributions...

A metamaterial (from the Greek word μετά meta, meaning "beyond" or "after", and the Latin word materia, meaning "matter" or "material") is a type of material...

Energy transformation, also known as energy conversion, is the process of changing energy from one form to another. In physics, energy is a quantity that...

In condensed matter physics, a time crystal is a quantum system of particles whose lowest-energy state is one in which the particles are in repetitive...

An X-ray tube is a vacuum tube that converts electrical input power into X-rays. The availability of this controllable source of X-rays created the field...

The Lithium Tokamak Experiment (LTX), and its predecessor, the Current Drive Experiment-Upgrade (CDX-U), are devices dedicated to the study of liquid lithium...

Near-field scanning optical microscopy (NSOM) or scanning near-field optical microscopy (SNOM) is a microscopy technique for nanostructure investigation...

Neutron spin echo spectroscopy is an inelastic neutron scattering technique invented by Ferenc Mezei in the 1970s and developed in collaboration with John...

The ekpyrotic universe (/ˌɛkpaɪˈrɒtɪk/) is a cosmological model of the early universe that explains the origin of the large-scale structure of the cosmos...

The Newman–Penrose (NP) formalism is a set of notation developed by Ezra T. Newman and Roger Penrose for general relativity (GR). Their notation is an...

Dynamic nuclear polarization (DNP) results from transferring spin polarization from electrons to atomic nuclei, thereby aligning the nuclear spins to the...

The term subcooling (also called undercooling) refers to a liquid existing at a temperature below its normal boiling point. For example, water boils at...

The word electricity derives from Neo-Latin and ultimately Greek. It first appears in English in Francis Bacon's writings. Depending on context, the word...

Robert Norman was a 16th-century-English mariner, compass builder, and hydrographer who discovered magnetic inclination, the deviation of the Earth's magnetic...

In the Newman–Penrose (NP) formalism of general relativity, Weyl scalars refer to a set of five complex scalars { Ψ 0 , Ψ 1 , Ψ 2 , Ψ 3 , Ψ 4 } {\displaystyle...

Acoustic tweezers (also known as acoustical tweezers) are a set of tools that use sound waves to manipulate the position and movement of very small objects...

Reinhart Ahlrichs (16 January 1940 – 12 October 2016) was a German theoretical chemist. Ahlrichs was born on the 16 January 1940 in Göttingen. He studied...