Ion-Photon Entanglement Demonstrated
Researchers at the
University of Michigan in Ann Arbor, have demonstrated quantum entanglement between a single trapped cadmium ion and a photon emitted by the ion. The work, which was published in the March 11 issue of
Nature, points to potential applications not only in scalable quantum information processing schemes involving multiple and remotely located entangled ions, but also in quantum communication and cryptography.
In the experiment, the researchers used a polarized 214.5-nm laser pulse to initialize a single cadmium ion held in a radio-frequency trap to a particular hyperfine ground state. A second pulse then excited the ion to a higher state, from which it decayed and emitted a photon. After a microwave rotation pulse prepared the ion for measurement, a third laser pulse was used to detect the internal state of the atom.
To observe and quantify entanglement, the researchers compared the polarization of the emitted photon and the state of the ion. Over approximately 1000 trials, the system demonstrated an entanglement fidelity of at least 0.87.
LATEST NEWS
- Exail Signs LLNL Contract, Partners with Eelume
Apr 26, 2024
- Menlo Moves U.S. HQ: Week in Brief: 4/26/2024
Apr 26, 2024
- Optofluidics Platform Keys Label-, Amplification-Free Rapid Diagnostic Tool
Apr 25, 2024
- DUV Lasers Made with Nonlinear Crystals Enhance Lithography Performance
Apr 25, 2024
- Teledyne e2v, Airy3D Collaborate on 3D Vision Solutions
Apr 24, 2024
- One-Step Hologram Generation Speeds 3D Display Creation
Apr 24, 2024
- Innovation Award Winners for Laser Technology Honored in Aachen
Apr 23, 2024
- Intech 2024: AI Arrives on the Shop Floor
Apr 22, 2024