Quantum error correction beyond qubits

Aoki, Takao; Takahashi, Go; Kajiya, Tadashi; Yoshikawa, Jun-ichi; Braunstein, Samuel L.; van Loock, Peter; Furusawa, Akira

doi:10.1038/NPHYS1309

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Quantum error correction beyond qubits

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van Loock, Peter
van Loock Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;

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Citation

Aoki, T., Takahashi, G., Kajiya, T., Yoshikawa, J.-i., Braunstein, S. L., van Loock, P., et al. (2009). Quantum error correction beyond qubits. NATURE PHYSICS, 5(8), 541-546. doi:10.1038/NPHYS1309.

Cite as: https://hdl.handle.net/11858/00-001M-0000-002D-6BC3-A

Abstract

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.