Bixuan Fan, Anton F. Kockum, Joshua Combes, Göran Johansson, Io-chun Hoi, Christopher Wilson, Per Delsing, G. J. Milburn, Thomas M. Stace
We show, in the context of single photon detection, that an atomic three-level model for a transmon in a transmission line does not support the predictions of the nonlinear polarisability model known as the cross-Kerr effect. We show that the induced displacement of a probe in the presence or absence of a single photon in the signal field, cannot be resolved above the quantum noise in the probe. This strongly suggests that cross-Kerr media are not suitable for photon counting or related single photon applications. Our results are presented in the context of a transmon in a one dimensional microwave waveguide, but the conclusions also apply to optical systems.
View original:
http://arxiv.org/abs/1210.0991
No comments:
Post a Comment