Bose-Einstein condensate, a gaseous superfluid phase formed by atoms cooled to temperatures very near to absolute zero
Bose-Einstein statistics, a statistics that determines the statistical distribution of identical indistinguishable bosons over the energy states in thermal equilibrium
Einstein notation, a notational convention useful when dealing with coordinate equations or formulas
Einstein shift, the effect that clocks in a gravitational field tick slower when observed by a distant observer
Einstein-Podolsky-Rosen paradox, a thought experiment which demonstrates that the result of a measurement performed on one part of a quantum system can have an instantaneous effect on the result of a measurement performed on another part
Einstein (unit), a unit used in irradiance and photochemistry