Characterization of complex quantum dynamics with a scalable NMR information processor

Details Characterization of complex quantum dynamics with a scalable NMR information processor Characterization of complex quantum dynamics with a scalable NMR information processor

2005-06-10

arxiv.org/abs/quant-ph/0506085v2

Physical Review Letters, 95, 250502 (2005)

Physics

Quantum Physics

4pages, 3 figures, revtex4, updated with version closer to that published

Scientific paper

10.1103/PhysRevLett.95.250502

We present experimental results on the measurement of fidelity decay under contrasting system dynamics using a nuclear magnetic resonance quantum information processor. The measurements were performed by implementing a scalable circuit in the model of deterministic quantum computation with only one quantum bit. The results show measurable differences between regular and complex behaviour and for complex dynamics are faithful to the expected theoretical decay rate. Moreover, we illustrate how the experimental method can be seen as an efficient way for either extracting coarse-grained information about the dynamics of a large system, or measuring the decoherence rate from engineered environments.

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