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Generalized overlap quantum state tomography
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DOI：10.1103/PhysRevResearch.2.042002.png)
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Abstract
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We propose and experimentally demonstrate a quantum state tomography protocol that generalizes and improves upon the Wallentowitz-Vogel-Banaszek-Wodkiewicz point-by-point Wigner function reconstruction. The full density operator of an arbitrary quantum state is efficiently reconstructed in the Fock basis, using semidefinite programming, after interference with a small set of calibrated coherent states. This protocol is resource- and computationally efficient, is robust against noise, does not rely on approximate state displacements, and ensures the physicality of results.
Keywords:
HOMODYNE TOMOGRAPHY
WIGNER FUNCTION
DENSITY-MATRIX
GENERATION
OPERATOR
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