Adaptive quantum state estimation of an entangled qubit state

The uncertainty on the estimation of unknown parameters of a quantum state can be reduced by using adaptive measurements. Here we perform adaptive quantum-state estimation of the phase in an entangled two-qubits state. We experimentally demonstrate that the adaptive method outperforms nonadaptive me...

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Bibliographic Details
Published in:Optics letters 2014-09, Vol.39 (18), p.5399-5402
Main Authors: Lerch, Stefan, Stefanov, André
Format: Article
Language:English
Subjects:
Qubits (quantum computing)
State estimation
Uncertainty
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Summary:The uncertainty on the estimation of unknown parameters of a quantum state can be reduced by using adaptive measurements. Here we perform adaptive quantum-state estimation of the phase in an entangled two-qubits state. We experimentally demonstrate that the adaptive method outperforms nonadaptive methods.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.39.005399