Friday, September 6, 2019

quantum mechanics - Does this Zeilinger group result provide experimental proof of backward-in-time causation?


Does this recent Zeilinger group delayed choice entanglement experiment imply backward-in-time influences? http://arxiv.org/abs/1203.4834
From the abstract: "This can also be viewed as “quantum steering into the past ”."




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classical mechanics - Moment of a force about a given axis (Torque) - Scalar or vectorial?

I am studying Statics and saw that: The moment of a force about a given axis (or Torque) is defined by the equation: $M_X = (\vec r \times \...