Which physicist introduced the term “quantum entanglement” in a 1935 paper?

Erwin Schrödinger introduced the term “quantum entanglement” in a 1935 paper.

Schrödinger used the German term Verschränkung while discussing the consequences of quantum mechanics for composite systems. He argued that measurements on one part of an entangled system can determine correlations with another part, even when the parts are separated.

The same year, Albert Einstein, Boris Podolsky, and Nathan Rosen published the EPR paper, which questioned whether quantum mechanics gave a complete description of reality. Schrödinger’s analysis responded to this broader debate and emphasized entanglement as a central feature rather than a minor oddity.

Entanglement does not allow usable information to travel faster than light. Its correlations become evident when results from measurements are compared, and quantum theory predicts patterns that cannot be reproduced by local hidden-variable theories. John Bell later turned this issue into experimentally testable inequalities in 1964.