Oct. 4, 1916—Nov. 8, 2009

MOSCOW—Vitaly Ginzburg, a co-winner of the 2003 Nobel Prize in physics who helped to develop the hydrogen bomb, died Sunday in Moscow, the Russian Academy of Sciences said in a statement. He was 93.

Mr. Ginzburg shared the Nobel Prize with Alexei Abrikosov and Anthony Leggett for “pioneering contributions to the theory of superconductors and superfluids,” according to the Nobel Web site.

For his work in developing thermonuclear weapons, Mr. Ginzburg received the Stalin Prize and the Order of Lenin, according to his biography on the Russian Academy of Sciences Web site.

Mr. Ginzburg’s contributions to physics also included groundbreaking work in quantum theory, optics, radio astronomy and the origin of cosmic rays.

He published more than 450 scientific works, including more than 10 monographs and textbooks, the academy said.

Superconducting material is used in magnetic resonance imaging for medical examinations and particle accelerators in physics, the Royal Swedish Academy of Sciences said on its Web site.

Studying superfluid liquids “can give us deeper insight into the ways in which matter behaves in its lowest and most ordered state,” the academy said.