Intermode dephasing in a superconducting stripline resonator
نویسندگان
چکیده
We study a superconducting stripline resonator SSR made of niobium, which is integrated with a superconducting interference device SQUID . The large nonlinear inductance of the SQUID gives rise to a strong Kerr nonlinearity in the response of the SSR, which in turn results in strong coupling between different modes of the SSR. We experimentally demonstrate that such intermode coupling gives rise to dephasing of microwave photons. The dephasing rate depends periodically on the external magnetic flux applied to the SQUID, where the largest rate is obtained at half integer values in units of the flux quantum . To account for our result we compare our findings with theory and find good agreement.
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