Wigner's friend and continuous time evolution of the state of a closed system and the probabilistic, discontinuous collapse of the state of a system upon measurement. Wigner's friend is therefore directly linked to the measurement problem in quantum mechanics with its famous Schrödinger's cat paradox. The thought experiment posits a friend of Wigner in a laboratory and lets him perform a quantum measurement on a physical system (this could be a spin system or also Schrödinger's cat). This system is assumed to be in a superposition of two distinct states, say, state 0 and state 1 (or "dead" and "alive", in the
Dead or Alive 5 Dead or Alive 5 Dead or Alive 5 (abbreviated to DOA5) is a fighting video game in the "Dead or Alive" series, developed by Team Ninja and released by Tecmo Koei simultaneously for the PlayStation 3 and Xbox 360 in 2012. It is the first "Dead or Alive" game to have a multi-platform release since "Dead or Alive 2" as well as the series' first installment that was released for the PlayStation 3. "Dead or Alive 5" features guest characters from Sega's "Virtua Fighter" fighting game series and several new gameplay mechanics, as well as improved graphics and a more