Martin Charles Gutzwiller (12 October 1925 – 3 March 2014[2]) was a Swiss-American physicist, known for his work on field theory, quantum chaos, and complex systems.

He completed a Diploma degree from ETH Zurich, where he studied quantum physics under Wolfgang Pauli.

After graduation, he worked on microwave engineering for Brown, Boveri & Cie, on geophysics for Shell Oil, and eventually for IBM Research in Switzerland, New York City, and Yorktown Heights, until his retirement in 1993.

He also held temporary teaching appointments at Columbia University, ETH Zurich, Paris-Orsay, and Stockholm.

Gutzwiller is also known for finding novel solutions to mathematical problems in field theory, wave propagation, crystal physics, and celestial mechanics.