Gabriel Aeppli (born 25 November 1956) is a Swiss-American electrical engineer, co-founder of the London Centre for Nanotechnology, professor of physics at ETH Zürich and EPF Lausanne, and head of the Synchrotron and Nanotechnology department of the Paul Scherrer Institute, also in Switzerland.

His work has helped to demonstrate that quantum spin fluctuations underlie exotic superconductivity.

Shortly after birth, Gabriel Aeppli moved from Zürich with his father to the United States.

[4] His current technical focus is on the implications of photon science and nanotechnology for information processing and health care.

[7] In addition, he has been a member and chairman of many panels, sponsored by the USDOE, American Physical Society, EPSRC, and National Research Council (US), among others.