Tomography of Binary Quantum Detectors

Yuanlong Wang1, Daoyi Dong2, Hidehiro Yonezawa2

  • 1University of New South Wales, Canberra
  • 2University of New South Wales

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Category

Invited Session

Sessions

10:00 - 12:00 | Wed 11 Dec | Gallieni 2 | WeA12

Dynamics, Control and Information Processing of Quantum Systems

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Abstract

A tomography method for binary detectors is developed. In this method, different input states are employed and the measurement data are then collected. First a primary estimation of the detector is obtained through least squares estimation, without considering the restriction on the eigenvalues of the detector. Then this possibly nonphysical estimation is projected onto the physical subspace to obtain a final estimation. We analyze the computational complexity of this algorithm, and present a theoretical error upper bound. Numerical simulation on a two-qubit example validates the effectiveness of the algorithm.

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