Details

Autor(en) / Beteiligte

• Saeedi, Kamyar
• Simmons, Stephanie
• Salvail, Jeff Z.
• Dluhy, Phillip
• Riemann, Helge
• Abrosimov, Nikolai V.
• Becker, Peter
• Pohl, Hans-Joachim
• Morton, John J. L.
• Thewalt, Mike L. W.

Titel

Room-Temperature Quantum Bit Storage Exceeding 39 Minutes Using Ionized Donors in Silicon-28

Ist Teil von

• Science (American Association for the Advancement of Science), 2013-11, Vol.342 (6160), p.830-833

Ort / Verlag

Washington, DC: American Association for the Advancement of Science

Erscheinungsjahr

2013

Quelle

Science Online_科学在线

Beschreibungen/Notizen

• Quantum memories capable of storing and retrieving coherent information for extended times at room temperature would enable a host of new technologies. Electron and nuclear spin qubits using shallow neutral donors in semiconductors have been studied extensively but are limited to low temperatures (<̰10 kelvin); however, the nuclear spins of ionized donors have the potential for high-temperature operation. We used optical methods and dynamical decoupling to realize this potential for an ensemble of phosphorous-31 donors in isotopically purified silicon-28 and observed a room-temperature coherence time of over 39 minutes. We further showed that a coherent spin superposition can be cycled from 4.2 kelvin to room temperature and back, and we report a cryogenic coherence time of 3 hours in the same system.