Lev Petrovich Pitaevskii (Russian: Лев Петро́вич Пита́евский [ˈlʲef pʲɪˈtrovʲɪtɕ pʲɪˈtajɪfskʲɪj]; 18 January 1933 – 23 August 2022) was a Russian theoretical physicist, who made contributions to the theory of quantum mechanics, electrodynamics, low-temperature physics, plasma physics, and condensed matter physics. Together with his PhD supervisor Evgeny Lifshitz and with Vladimir Berestetskii, he was also the co-author of a few volumes of the influential Landau–Lifschitz Course of Theoretical Physics series. His academic status was professor. Source: Wikipedia (en)