Multiphoton transitions in a macroscopic quantum two-state system
介观与纳米尺度物理
2007-05-23 v1 超导电性
摘要
We have observed multiphoton transitions between two macroscopic quantum-mechanical superposition states formed by two opposite circulating currents in a superconducting loop with three Josephson junctions. Resonant peaks and dips of up to three-photon transitions were observed in spectroscopic measurements when the system was irradiated with a strong RF-photon field. The widths of the multiphoton absorption dips are shown to scale with the Bessel functions in agreement with theoretical predictions derived from the Bloch equation or from a spin-boson model.
引用
@article{arxiv.cond-mat/0403425,
title = {Multiphoton transitions in a macroscopic quantum two-state system},
author = {S. Saito and M. Thorwart and H. Tanaka and M. Ueda and H. Nakano and K. Semba and H. Takayanagi},
journal= {arXiv preprint arXiv:cond-mat/0403425},
year = {2007}
}
备注
4 pages, 3 figures