Measurement scheme for the Lamb shift in a superconducting circuit with broadband environment
Mesoscale and Nanoscale Physics
2011-11-11 v2 Superconductivity
Abstract
Motivated by recent experiments on quantum mechanical charge pumping in a Cooper pair sluice, we present a measurement scheme for observing shifts of transition frequencies in two-level quantum systems induced by broadband environmental fluctuations. In contrast to quantum optical and related set-ups based on cavities, the impact of a thermal phase reservoir is considered. A thorough analysis of Lamb and Stark shifts within weak-coupling master equations is complemented by non-perturbative results for the model of an exactly solvable harmonic system. The experimental protocol to measure the Lamb shift in experimentally feasible superconducting circuits is analysed in detail and supported by numerical simulations.
Keywords
Cite
@article{arxiv.1109.4572,
title = {Measurement scheme for the Lamb shift in a superconducting circuit with broadband environment},
author = {V. Gramich and P. Solinas and M. Möttönen and J. P. Pekola and J. Ankerhold},
journal= {arXiv preprint arXiv:1109.4572},
year = {2011}
}
Comments
8 pages, 4 figures