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Einride
Einride is a Stockholm-based freight technology company, founded in 2016, that operates autonomous all-electric trucks and was the first to run a cabless heavy vehicle on public roads in Europe.
Einsatzgruppen
Einsatzgruppen (task forces; Einsatzgruppen des SD und der Sipo) were SS Security Police and SD mobile killing squads that followed the Wehrmacht, murdering over one million civilians, mostly Jews, by mass shooting in the occupied Soviet Union from 1941.
Einselection
Einselection, short for environment-induced superselection, is a quantum-mechanical process introduced by Wojciech Zurek in 1981 in which interaction with an environment selects stable pointer states.
Einsiedeln Abbey
Einsiedeln Abbey (Kloster Einsiedeln) is a Benedictine monastery in the canton of Schwyz, Switzerland, founded in 934 and famous for its Chapel of Grace and Black Madonna.
Einstein (American TV series)
Einstein is an upcoming CBS comedic crime procedural adapted from a German series, starring Matthew Gray Gubler as Lewis Einstein, Albert Einstein's directionless great-grandson turned police consultant.
Einstein (crater)
Einstein is a large lunar impact crater on the Moon, about 181 km across, named for physicist Albert Einstein, with the name approved by the IAU in 1964.
Einstein and Eddington
Einstein and Eddington refers to the scientific relationship between Albert Einstein and Cambridge astronomer Arthur Eddington, whose 1919 eclipse expedition gave general relativity its first observational confirmation.
Einstein Bros. Bagels
Einstein Bros. Bagels: American fast-casual bagel chain founded 1995 in Lakewood, Colorado by Boston Chicken/Boston Market; also Einstein/Noah Bagel Corp. Largest US retail bagel chain, owned since 2014 by JAB Holding's Bagel Brands under Panera Brands; plans 300 new bakeries by 2030.
Einstein cluster
The Einstein cluster is a static, spherically symmetric solution of general relativity introduced by Albert Einstein in 1939, describing a spherical shell of massive particles on circular geodesic orbits with no material pressure.
Einstein coefficients
Einstein coefficients are three constants quantifying the rates of spontaneous emission, absorption, and stimulated emission between two energy levels of an atom or molecule, introduced by Albert Einstein in 1916–1917.
Einstein constraint equations
The Einstein constraint equations are four of the ten Einstein field equations that contain no time derivatives, instead restricting the geometry and matter prescribed on a spacelike hypersurface.
Einstein equivalence principle
The Einstein equivalence principle (EEP) combines universality of free fall, local Lorentz invariance, and local position invariance; if it holds, gravity must be curved spacetime.
Einstein family
Einstein family: German-Jewish family of Albert Einstein from Kappel, Buchau, and Cannstatt, settled in Ulm from 1864; parents Hermann and Pauline, sister Maja, wives Mileva Marić and Elsa Einstein, children Lieserl, Hans Albert, Eduard, Nazi-era losses, Princeton household.
Einstein field equations
The Einstein field equations, or Einstein's equations, are the central equations of general relativity, relating spacetime curvature to matter and energy, published by Einstein in 1915.
Einstein manifold
An Einstein manifold is a manifold with a pseudo-Riemannian metric whose Ricci tensor is proportional to the metric, the analog of vacuum solutions of general relativity's field equations.
Einstein notation
Einstein notation, also called the Einstein summation convention, is a notational convention in which an index appearing twice in a term is implicitly summed, omitting the summation sign.
Einstein Observatory
The Einstein Observatory, originally designated HEAO-2, was a NASA X-ray astronomy satellite launched in 1978 that carried the first fully imaging X-ray telescope into space, operating until 1981.
Einstein Probe
Einstein Probe is a Chinese Academy of Sciences X-ray astronomy satellite launched on January 9, 2024, to discover high-energy transients and monitor variable X-ray sources.
Einstein relation (kinetic theory)
The Einstein relation, also called the Stokes–Einstein or Einstein–Smoluchowski relation, connects diffusion coefficient D and mobility μ by D = μkBT, the first fluctuation-dissipation theorem, derived in 1905.
Einstein ring
An Einstein ring, also called a Chwolson ring, is a ring-shaped image of a distant light source formed by gravitational lensing when source, lens, and observer align.
Einstein solid
The Einstein solid is a mathematical model treating each atom of a crystal as an identical quantum harmonic oscillator, introduced by Albert Einstein in 1907.
Einstein static universe
The Einstein static universe is a cosmological model proposed by Albert Einstein in 1917, in which a finite, motionless universe is held static by a cosmological constant.
Einstein synchronisation
Einstein synchronisation is a convention for setting distant clocks to the same time by exchanging light signals, introduced in §1 of Albert Einstein's 1905 paper on special relativity.
Einstein Telescope
The Einstein Telescope is a proposed European third-generation gravitational-wave observatory, an underground laser interferometer with 10 km arms designed to be about 10 times more sensitive than current detectors.
Einstein tensor
The Einstein tensor, or Einstein curvature tensor, is a symmetric tensor built from the metric and its curvature that appears on the left side of the Einstein field equations.
EinStein Wurfelt Nicht
EinStein würfelt nicht! (Ewn) is a 2004 dice board game by Ingo Althöfer on a 5×5 grid with six numbered stones per player; win by reaching the opponent's corner or capturing all enemy stones.
Einstein–Bergson debate
The Einstein–Bergson debate was the 6 April 1922 Paris confrontation between physicist Albert Einstein and philosopher Henri Bergson over the nature of time, relativity, and lived duration; it split intellectual communities, influenced Bergson's reputation, and remains relevant to the problem of time in quantum gravity.
Einstein–Brillouin–Keller method
The Einstein–Brillouin–Keller (EBK) method, also called torus quantization, is a semiclassical quantization scheme that assigns an action condition with a Maslov phase correction to each invariant torus of an integrable classical system.
Einstein–Cartan theory
Einstein–Cartan theory is a modification of general relativity in which spacetime has torsion tied to the spin of matter, proposed by Élie Cartan in 1922.
Einstein–Hilbert action
The Einstein–Hilbert action is the functional in general relativity whose metric variation yields the Einstein field equations, built from the Ricci scalar and introduced by Hilbert in 1915.