Erwin Rudolf Josef Alexander Schrödinger ( , ; 12 August 1887 – 4 January 1961), sometimes written as ' or ', was an Austrian–Irish theoretical physicist who developed fundamental results in quantum theory. In particular, he is recognized for devising the Schrödinger equation, an equation that provides a way to calculate the wave function of a system and how it changes dynamically in time. He coined the term "quantum entanglement" in 1935. Wikipedia