Quantum error correction beyond qubits

Details Quantum error correction beyond qubits Quantum error correction beyond qubits

2008-11-24

arxiv.org/abs/0811.3734v1

Nature Physics 5, 541 (2009)

Physics

Quantum Physics

realization of a Gaussian error correction protocol suitable for non-Gaussian error correction

Scientific paper

Quantum computation and communication rely on the ability to manipulate quantum states robustly and with high fidelity. Thus, some form of error correction is needed to protect fragile quantum superposition states from corruption by so-called decoherence noise. Indeed, the discovery of quantum error correction (QEC) turned the field of quantum information from an academic curiosity into a developing technology. Here we present a continuous-variable experimental implementation of a QEC code, based upon entanglement among 9 optical beams. In principle, this 9-wavepacket adaptation of Shor's original 9-qubit scheme allows for full quantum error correction against an arbitrary single-beam (single-party) error.

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