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Information gain in tomography-A quantum signature of chaos
, Riofrío C.A., Ghose S., Deutsch I.H.
Published in American Physical Society
Volume: 112
Issue: 1
We find quantum signatures of chaos in various metrics of information gain in quantum tomography. We employ a quantum state estimator based on weak collective measurements of an ensemble of identically prepared systems. The tomographic measurement record consists of a sequence of expectation values of a Hermitian operator that evolves under repeated application of the Floquet map of the quantum kicked top. We find an increase in information gain and, hence, higher fidelities in the reconstruction algorithm when the chaoticity parameter map increases. The results are well predicted by random matrix theory. © 2014 American Physical Society.
About the journal
JournalData powered by TypesetPhysical Review Letters
PublisherData powered by TypesetAmerican Physical Society
Open AccessNo