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 Xtreme 2 Dead or Alive Xtreme 2 Much like its predecessor "Dead or Alive Xtreme Beach Volleyball", "DOA Xtreme 2" features a two-week vacation mode, where the player can indulge in a variety of activities (listed below). Each day is broken up into three segments (morning, afternoon, and evening), where players can perform a single activity during each. In "Dead or Alive Xtreme 2", players are able to play as any of the nine girls present in the series at the time of the game's release. Each girl in the game has certain items and hobbies which she likes or dislikes, and