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
Kasumi (Dead or Alive) in her standard fighting outfit on the other. "Dead or Alive 5" pre-order bonuses included an exclusive Kasumi-themed iPhone case from the online retailer ShopTo.Net. Merchandise released for "DOA5" include another Kasumi-themed 3D mousepad and body pillow cases. Kasumi was featured on the covers of "Dead or Alive 5 Postcard School Calendar 2013" and on 2005's comic anthology companion for "Dead or Alive Ultimate". "Dead or Alive 5 Ultimate" "Kasumi-chan Blue" limited edition includes Kasumi-themed 3D mousepad, playing cards, lifesize tapestry and bath poster; the game's collector's edition also contains a Kasumi 3D mousepad and playing cards. She is one