Arvan Harvat (b. 1958) is a pen name for a Croatian physicist and esotericist. He has an M.Sc from Zagreb University (thesis in physics (elementary particle physics, Quantum Chromodynamics), but finds modern physics, although a valuable enterprise, not nearly cognitively important as he first fancied it to be. He therefore seeks "wisdom" rather than scientific "insight". Through various efforts, from writing to networking, he is "struggling to make his soul" (in Orwell's phrase).
Arvan has written on various subjects, including the Gurdjieff-Ouspensky system, Psychosynthesis, an introduction to Process Physics and a critique of Ken Wilber.