Limits to error correction in quantum chaos

Details Limits to error correction in quantum chaos Limits to error correction in quantum chaos

2000-12-21

arxiv.org/abs/quant-ph/0012119v1

Phys.Rev.Lett. 86, 5192 (2001)

Physics

Quantum Physics

4 pages including 1 figure

Scientific paper

10.1103/PhysRevLett.86.5192

We study the correction of errors that have accumulated in an entangled state of spins as a result of unknown local variations in the Zeeman energy (B) and spin-spin interaction energy (J). A non-degenerate code with error rate kappa can recover the original state with high fidelity within a time kappa^1/2 / max(B,J) -- independent of the number of encoded qubits. Whether the Hamiltonian is chaotic or not does not affect this time scale, but it does affect the complexity of the error-correcting code.

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