Conditional preparation of non-Gaussian quantum optical states by mesoscopic measurement

Conditional preparation of non-Gaussian quantum optical states by mesoscopic measurement

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Non-Gaussian states of an optical field are important as a proposed resource in quantum information applications.While conditional preparation is a highly successful approach to preparing such states, their quality is limited by detector non-idealities such as dead time, narrow dynamic range, limited quantum efficiency and dark noise.Mesoscopic photon counters, with peak performance at higher photon number, offer many practical advantages over single-photon level conditioning detectors.

Here mozelle riesling we enchanted wonderstruck perfume propose a novel approach involving displacement of the ancilla field into the regime where mesoscopic detectors can be used.We explore this strategy theoretically and present simulations accounting for experimental non-idealities such as loss and amplification noise, showing that precise photon-number resolution is not necessary to herald highly nonclassical states.We conclude that states with strong Wigner negativity can be prepared at high rates by this technique under experimentally attainable conditions.