Efficient Quantum Tomography of Two-Mode Wigner Functions
arXiv:1912.12222 · doi:10.1140/epjd/e2020-100649-3
Abstract
We introduce an efficient method to reconstruct the Wigner function of many-mode continuous variable systems. It is based on convex optimization with semidefinite programs, and also includes a version of the maximum entropy principle, in order to yield unbiased states. A key ingredient of the proposed approach is the representation of the state in a truncated Fock basis. As a bonus, the discrete finite representation allows to easily quantify the entanglement.
13 pages, 4 figures
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