Physicists ‘teleport’ logic operation between separated ions

Science Daily  May 30, 2019
Teleportation of quantum data has been demonstrated previously with ions and a variety of other quantum systems. Now a team of researchers in the US (NIST, University of Colorado) teleported a quantum controlled-NOT (CNOT) logic operation, or logic gate, between two beryllium ion qubits located more than 340 micrometers apart in separate zones of an ion trap, a distance that rules out any substantial direct interaction. A “messenger” pair of entangled magnesium ions is used to transfer information between the beryllium ions (infographic ). They found that its teleported CNOT process entangled the two magnesium ions with a 95% success rate, while the full logic operation succeeded 85% to 87% of the time. In addition to generating a truth table, the researchers checked the consistency of the data over extended run times to help identify error sources in the experimental setup. This technique is expected to be an important tool in characterizing quantum information processes in future experiments…read more.

Quantum computing concept (stock image). Credit: © Siarhei / Adobe Stock

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