Phys.org April 13, 2020
An international team of researchers (USA – University of Colorado, NIST, Caltech, Australia, Singapore) fabricated a periodic, nano-patterned 10 micron-long cavity with the ion at its centre. Light bounces back and forth many times in the cavity, greatly increasing the chance of the light interacting with the ion. The researchers then manipulated their ion qubit using laser and microwave pulses. The result is the emission of a photon that is entangled with the qubit – a photon that itself is a flying qubit of quantum information. More than 99% of the time, they found that this entangled photon remained inside the cavity, bouncing back and forth. The photon and ion can remain entangled for up to 30 ms…read more. TECHNICAL ARTICLEÂ
Caught in a trap: the nanophotonic cavity used to create the ytterbium ion qubit. (Courtesy: Faraon lab/Caltech)