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Correlated oscillations in Kerr parametric oscillators with tunable effective coupling

T. YamajiS. MasudaA. Yamaguchi ...+4 T. Yamamoto
Dec 2022
摘要
We study simultaneous parametric oscillations in a system composed of twodistributed-element-circuit Josephson parametric oscillators in thesingle-photon Kerr regime coupled via a static capacitance. The energy of thesystem is described by a two-bit Ising Hamiltonian with an effective couplingwhose amplitude and sign depend on the relative phase between parametric pumps.We demonstrate that the binary phases of the parametric oscillations arecorrelated with each other, and that the parity and strength of the correlationcan be controlled by adjusting the pump phase. The observed correlation isreproduced in our simulation taking pure dephasing into account. The presentresult demonstrates the tunability of the Hamiltonian parameters by the phaseof external microwave, which can be used in the the Ising machine hardwarecomposed of the KPO network.
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