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Control of multi-modal scattering in a microwave frequency comb
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Control of multi-modal scattering in a microwave frequency comb
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Control over the coupling between multiple modes of a frequency comb is an important step toward measurement-based quantum computation with a continuous-variable system. We demonstrate the creation of square-ladder correlation graphs in a microwave comb with 95 modes. The graphs are engineered through precise control of the relative phase of three pumps applied to a Josephson parametric oscillator. Experimental measurement of the mode scattering matrix is in good agreement with theoretical predictions based on a linearized equation of motion of the parametric oscillator. The digital methods used to create and measure the correlations are easily scaled to more modes and more pumps, with the potential to tailor a specific correlation graph topology.
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Cited by 1 Pith paper
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Solving the inverse parametric problem
A closed-form 'pump projection method' computes the pump amplitudes and phases that realize a target scattering matrix in a parametric oscillator, validated numerically and experimentally.
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