Physics
Scientific paper
Aug 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996rpph...59..935k&link_type=abstract
Reports on Progress in Physics, Volume 59, Issue 8, pp. 935-992 (1996).
Physics
68
Scientific paper
The design of zero-bias Josephson voltage standards is presented as a case study in nonlinear dynamics. Based on superconducting tunnel junctions, such standards rely on nonlinearity to create a phase lock between an internal junction variable and an applied rf bias. In the terminology of nonlinear dynamics, phase lock corresponds to motion on a periodic attractor. Not all attractors of the rf-biased junction are periodic, however, and both quasiperiodic and chaotic attractors must be avoided in voltage standards. Surprisingly, the optimum operating point for zero-bias standards is near a region of chaos. Thus, the Josephson coupling energy 0034-4885/59/8/001/img1, a measure of the junction's nonlinearity, must be chosen much larger than the thermal energy 0034-4885/59/8/001/img2 to avoid disruption by intrinsic noise but not so large that chaos is evoked. The optimum 0034-4885/59/8/001/img1 maximizes the activation energy 0034-4885/59/8/001/img4 required for thermally induced escape from the phase-locked attractor. For nonequilibrium systems like the rf-biased junction, 0034-4885/59/8/001/img4 is a difference in quasipotential that can be calculated by finding the most probable path for escape from a basin of attraction in the limit of low temperature.
No associations
LandOfFree
Noise, chaos, and the Josephson voltage standard does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Noise, chaos, and the Josephson voltage standard, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Noise, chaos, and the Josephson voltage standard will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-774590