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Phys Rev Lett. 2016 Jul 22;117(4):040402. doi: 10.1103/PhysRevLett.117.040402. Epub 2016 Jul 21.

Experimental Demonstration of Self-Guided Quantum Tomography.

Author information

1
Quantum Photonics Laboratory, School of Engineering, RMIT University, Melbourne, Victoria 3000, Australia and School of Physics, The University of Sydney, Sydney, New South Wales 2006, Australia.
2
Centre for Engineered Quantum Systems, School of Physics, The University of Sydney, Sydney, New South Wales 2006, Australia.

Abstract

Traditional methods of quantum state characterization are impractical for systems of more than a few qubits due to exponentially expensive postprocessing and data storage and lack robustness against errors and noise. Here, we experimentally demonstrate self-guided quantum tomography performed on polarization photonic qubits. The quantum state is iteratively learned by optimizing a projection measurement without any data storage or postprocessing. We experimentally demonstrate robustness against statistical noise and measurement errors on single-qubit and entangled two-qubit states.

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