The Effects of Symmetries on Quantum Fidelity Decay
arXiv:quant-ph/0502012 · doi:10.1103/PhysRevE.71.035203
Abstract
We explore the effect of a system's symmetries on fidelity decay behavior. Chaos-like exponential fidelity decay behavior occurs in non-chaotic systems when the system possesses symmetries and the applied perturbation is not tied to a classical parameter. Similar systems without symmetries exhibit faster-than-exponential decay under the same type of perturbation. This counter-intuitive result, that extra symmetries cause the system to behave in a chaotic fashion, may have important ramifications for quantum error correction.
5 pages, 3 figures, to be published Phys. Rev. E Rapid Communication
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