51 research outputs found
Efficient simulation scheme for a class of quantum optics experiments with non-negative Wigner representation
We provide a scheme for efficient simulation of a broad class of quantum
optics experiments. Our efficient simulation extends the continuous variable
Gottesman-Knill theorem to a large class of non-Gaussian mixed states, thereby
identifying that these non-Gaussian states are not an enabling resource for
exponential quantum speed-up. Our results also provide an operationally
motivated interpretation of negativity as non-classicality. We apply our scheme
to the case of noisy single-photon-added-thermal-states to show that this class
admits states with positive Wigner function but negative P -function that are
not useful resource states for quantum computation.Comment: 14 pages, 1 figur
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