Research NewsQuantum Mechanics

To Send Data, Physicists Resort to Quantum Voodoo

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Science  25 Oct 1996:
Vol. 274, Issue 5287, pp. 504-505
DOI: 10.1126/science.274.5287.504


In a pursuit that holds a vague resemblance to voodoo, physicists are exploiting a quantum-mechanical paradox in which two particles are created simultaneously with their internal quantum states—their spin, for instance, or polarization—irrevocably “entangled.” These particles, linked at birth even though they may be separated by vast distances, can be used to transmit data or even to teleport entire quantum states.