Self-oscillations in a superconducting stripline resonator integrated with a dc superconducting quantum interference device

Segev, Eran; Suchoi, Oren; Shtempluck, Oleg; Buks, Eyal
October 2009
Applied Physics Letters;10/12/2009, Vol. 95 Issue 15, p152509
Academic Journal
We study self-sustained oscillations in a Nb superconducting stripline resonator integrated with a dc superconducting quantum interference device (SQUID). We find that both the power threshold where these oscillations start and the oscillation frequency are periodic in the applied magnetic flux threading the SQUID loop. A theoretical model which attributes the self-sustained oscillations to a thermal instability in the dc-SQUID yields a good agreement with the experimental results. This flux dependant nonlinearity may be used for quantum state reading of a qubit-superconducting resonator integrated device.


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