Mavrogordatos Th K, Tancredi G, Elliott M, Peterer M J, Patterson A, Rahamim J, Leek P J, Ginossar E, Szymańska M H
Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom.
Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom.
Phys Rev Lett. 2017 Jan 27;118(4):040402. doi: 10.1103/PhysRevLett.118.040402. Epub 2017 Jan 24.
We explore the joint activated dynamics exhibited by two quantum degrees of freedom: a cavity mode oscillator which is strongly coupled to a superconducting qubit in the strongly coherently driven dispersive regime. Dynamical simulations and complementary measurements show a range of parameters where both the cavity and the qubit exhibit sudden simultaneous switching between two metastable states. This manifests in ensemble averaged amplitudes of both the cavity and qubit exhibiting a partial coherent cancellation. Transmission measurements of driven microwave cavities coupled to transmon qubits show detailed features which agree with the theory in the regime of simultaneous switching.
一个腔模振荡器，它在强相干驱动色散 regime 中与一个超导量子比特强耦合。动力学模拟和互补测量表明，在一系列参数下，腔和量子比特都会在两个亚稳态之间突然同时切换。这表现为腔和量子比特的系综平均振幅呈现出部分相干相消。耦合到跨导量子比特的驱动微波腔的传输测量显示出详细特征，与同时切换 regime 中的理论相符。
