Effective description of tunneling in a time-dependent potential with applications to voltage switching in Josephson junctions
Christian Kraglund Andersen, Klaus Mølmer
DOI 10.1103/PhysRevA.87.052119 · Physical Review A
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We propose to use a time-dependent imaginary potential to describe quantum mechanical tunneling through time-varying potential barriers. We use Gamow solutions for stationary tunneling problems to justify our choice of potential, and we apply our method to describe tunneling of a mesoscopic quantum variable: the phase change across a Josephson junction. The Josephson junction phase variable behaves as the position coordinate of a particle moving in a tilted washboard potential, and our general solution to the motion in such a potential with a time-dependent tilt reproduces a number of features associated with voltage switching in Josephson junctions. Apart from applications as artificial atoms in quantum information studies, the Josephson junction may serve as an electric field sensitive detector, and our studies provide a detailed understanding of how the voltage switching dynamics couples to the electric field amplitude.
Similar papers
Effective description of tunneling in a time-dependent potential with applications to voltage switching in Josephson junctions
similarity 0.92Christian Kraglund Andersen & Klaus Mølmer · 2013 · arXiv:1303.5644
Source status unknown — claims are unverified
Resonant tunneling in small current-biased Josephson junctions
similarity 0.91J. M. Schmidt et al.
Source status unknown — claims are unverified
Dynamical control of the conductivity of an atomic Josephson junction
similarity 0.90Beilei Zhu et al.
Source status unknown — claims are unverified
Quantitative description of Josephson-like tunneling in νT=1 quantum Hall bilayers
similarity 0.89Timo Hyart & Bernd Rosenow
Source status unknown — claims are unverified
Quasiparticle effects in quantum-induced transitions in superconductors
similarity 0.89Jungzae Choi & Jorge V. José
Source status unknown — claims are unverified
High resolution measurements of the switching current in a Josephson tunnel junction: Thermal activation and macroscopic quantum tunneling
similarity 0.88A. Wallraff et al. · 2002 · arXiv:cond-mat/0204527
Source status unknown — claims are unverified