Dennis Geert Bernardus Johan Dieks (born 1 June 1949, in Amsterdam) is a Dutch physicist and philosopher of physics.
In 1982 he proved the no-cloning theorem[1] (independently discovered in the same year by William Wootters and Wojciech H. Zurek).
Dieks is a professor at Utrecht University and a member of the Royal Netherlands Academy of Arts and Sciences since 2008.
In 2024, he received the Langerhuizen oeuvre prize from the Royal Holland Society of Sciences and Humanities (Koninklijke Hollandsche Maatschappij der Wetenschappen).
[5] Dieks was also an able chess player, reaching a maximum Elo rating of 2290 in 1974[6] and even beating Jan Timman in a game played in 1977.