Quantum State Sensitivity of an Autoresonant Superconducting Circuit
Murch, KW, Ginossar, E, Weber, SJ, Vijay, R, Girvin, SM and Siddiqi, I (2012) Quantum State Sensitivity of an Autoresonant Superconducting Circuit Physics Review B .
Available under License : See the attached licence file.
When a frequency chirped excitation is applied to a classical high-Q nonlinear oscillator, its motion becomes dynamically synchronized to the drive and large oscillation amplitude is observed, provided the drive strength exceeds the critical threshold for autoresonance. We demonstrate that when such an oscillator is strongly coupled to a quantized superconducting qubit, both the effective nonlinearity and the threshold become a non-trivial function of the qubit-oscillator detuning. Moreover, the autoresonant threshold is sensitive to the quantum state of the qubit and may be used to realize a high fidelity, latching readout whose speed is not limited by the oscillator Q.
|Additional Information:||Murch, K. W., et al. "Quantum State Sensitivity of an Autoresonant Superconducting Circuit. arXiv preprint arXiv:1208.4646 (2012).|
|Divisions:||Faculty of Engineering and Physical Sciences > Physics|
|Deposited By:||Symplectic Elements|
|Deposited On:||06 Dec 2012 11:27|
|Last Modified:||08 Jun 2013 15:56|
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