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RESEARCH PRODUCT
Quantum error correction and detection: Quantitative analysis of a coherent-state amplitude-damping code
Ricardo WickertRicardo WickertPeter Van LoockPeter Van LoockPeter Van Loocksubject
PhysicsQuantum PhysicsFOS: Physical sciencesUpper and lower boundsAtomic and Molecular Physics and OpticsQuantum error correctionCyclic codeQubitQuantum mechanicsCode (cryptography)Coherent statesConstant-weight codeQuantum Physics (quant-ph)Entanglement distillationAlgorithmdescription
We re-examine a non-Gaussian quantum error correction code designed to protect optical coherent-state qubits against errors due to an amplitude damping channel. We improve on a previous result [Phys. Rev. A 81, 062344 (2010)] by providing a tighter upper bound on the performance attained when considering realistic assumptions which constrain the operation of the gates employed in the scheme. The quantitative characterization is performed through measures of fidelity and concurrence, the latter obtained by employing the code as an entanglement distillation protocol. We find that, when running the code in fully-deterministic error correction mode, direct transmission can only be beaten for certain combinations of channel and input state parameters, whereas in error detection mode, the usage of higher repetition encodings remains beneficial throughout.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-03-01 | Physical Review A |