Tunneling spectroscopy using a probe qubit
Superconductivity
2013-01-04 v2 Quantum Physics
Abstract
We describe a quantum tunneling spectroscopy technique that requires only low bandwidth control. The method involves coupling a probe qubit to the system under study to create a localized probe state. The energy of the probe state is then scanned with respect to the unperturbed energy levels of the probed system. Incoherent tunneling transitions that flip the state of the probe qubit occur when the energy bias of the probe is close to an eigenenergy of the probed system. Monitoring these transitions allows the reconstruction of the probed system eigenspectrum. We demonstrate this method on an rf SQUID flux qubit.
Cite
@article{arxiv.1210.6310,
title = {Tunneling spectroscopy using a probe qubit},
author = {A. J. Berkley and A. J. Przybysz and T. Lanting and R. Harris and N. Dickson and F. Altomare and M. H. Amin and P. Bunyk and C. Enderud and E. Hoskinson and M. W. Johnson and E. Ladizinsky and R. Neufeld and C. Rich and A. Yu. Smirnov and E. Tolkacheva and S. Uchaikin and A. B. Wilson},
journal= {arXiv preprint arXiv:1210.6310},
year = {2013}
}