Journal
NATURE PHYSICS
Volume 5, Issue 8, Pages 541-546Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/NPHYS1309
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Funding
- SCF, GIA, G-COE and PFN
- MEXT of Japan, and the Research Foundation for Opto-Science and Technology
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Quantum computation and communication rely on the ability to manipulate quantum states robustly and with high fidelity. To protect fragile quantum-superposition states from corruption through so-called decoherence noise, some form of error correction is needed. Therefore, the discovery of quantum error correction(1,2) (QEC) was a key step to turn the field of quantum information from an academic curiosity into a developing technology. Here, we present an experimental implementation of a QEC code for quantum information encoded in continuous variables, based on entanglement among nine optical beams(3). This nine-wave-packet adaptation of Shor's original nine-qubit scheme(1) enables, at least in principle, full quantum error correction against an arbitrary single-beam error.
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