Nonlocal effects of partial measurements and quantum erasure

  title={Nonlocal effects of partial measurements and quantum erasure},
  author={Avshalom C. Elitzur and Shahar Dolev},
  journal={Physical Review A},
Partial measurement turns the initial superposition not into a definite outcome but into a greater probability for it. The probability can approach 100%, yet the measurement can undergo complete quantum erasure. In the Einstein-Podolsky-Rosen ~EPR! setting, we prove that ~i! every partial measurement nonlocally creates the same partial change in the distant particle, and ~ii! every erasure inflicts the same erasure on the distant particle’s state. This enables an EPR experiment where the… 

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