Room-Temperature Quantum Bit Memory Exceeding One Second

Stable quantum bits, capable both of storing quantum information for macroscopic time scales and of integration inside small portable devices, are an essential building block for an array of potential applications. We demonstrate high-fidelity control of a solid-state qubit, which preserves its pola...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 2012-06, Vol.336 (6086), p.1283-1286
Main Authors: Maurer, P. C., Kucsko, G., Latta, C., Jiang, L., Yao, N. Y., Bennett, S. D., Pastawski, F., Hunger, D., Chisholm, N., Markham, M., Twitchen, D. J., Cirac, J. I., Lukin, M. D.
Format: Article
Language:English
Subjects:
Blocking
Classical and quantum physics: mechanics and fields
Climate
Coherence
Color
Construction
Depolarization
Diamonds
Electron paramagnetic resonance
Exact sciences and technology
Fluorescence
Impurities
Information Science
Ionization
Lasers
Magnetic fields
Modeling
Nuclear interactions
Nuclear spin
Physics
Quantum communication
Quantum computation
Quantum information
Qubits (quantum computing)
Storage time
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Summary:Stable quantum bits, capable both of storing quantum information for macroscopic time scales and of integration inside small portable devices, are an essential building block for an array of potential applications. We demonstrate high-fidelity control of a solid-state qubit, which preserves its polarization for several minutes and features coherence lifetimes exceeding 1 second at room temperature. The qubit consists of a single ¹³C nuclear spin in the vicinity of a nitrogen-vacancy color center within an isotopically purified diamond crystal. The long qubit memory time was achieved via a technique involving dissipative decoupling of the single nuclear spin from its local environment. The versatility, robustness, and potential scalability of this system may allow for new applications in quantum information science.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.1220513