Quantum superposition the eigenvector corresponding to the measured eigenvalue. It is natural to ask why ordinary everyday objects and events do not seem to display quantum mechanical features such as superposition. Indeed, this is sometimes regarded as "mysterious", for instance by Richard Feynman. In 1935, Erwin Schrödinger devised a well-known thought experiment, now known as Schrödinger's cat, which highlighted this dissonance between quantum mechanics and classical physics. One modern view is that this mystery is explained by quantum decoherence. A macroscopic system (such as a cat) may evolve over time into a superposition of classically distinct quantum states (such as "alive" and
Dead or Alive Ultimate 2", some changes to the music and remixes were added. Each character except Hitomi (which was introduced in "DOA3") has their own remix. The remixes only appear in the Dance Floor stage, The Ray House. The story mode of "Dead or Alive Ultimate" plays out as it did in the original. However, a new CG sequence is added further explaining the relationship and history of Ayane, Kasumi and Hayate leading into the first two Dead or Alive games. In 2004, after the release of "Dead or Alive 3", Team Ninja once again remade "Dead or Alive 2", this time for