MOSCOW — Vitaly Ginzburg, a Nobel-prize winning Russian physicist and one of the fathers of the Soviet hydrogen bomb, died late Sunday in Moscow at age 93.

The Russian Academy of Sciences said Ginzburg died of cardiac arrest.

Ginsburg won the 2003 Nobel Prize in physics for his contribution to theories on superconductivity, the ability of some materials to conduct electricity without resistance.

In the early 1950s, Ginzburg was part of the Soviet government project to develop a hydrogen bomb.

Ginzburg strongly opposed the growing role of Russian Orthodox Church in state affairs after the Soviet collapse, protesting its attempts to have a say in political and secular matters and introduce religious lessons in schools.