Coherence and Quantization in Nearly Superconducting Rings
Abstract
New experiments demonstrating macroscopic coherence and quantization in partially resistive superconducting rings with point contacts are described. These include: (1) the observation of quantized magnetic transitions for frequencies ω>ω_{1}=RL, where R is the resistance and L the inductance of the ring, and (2) the measurement of coherent oscillations at frequencies limited by thermal noise fluctuations, 8k_{B}TRΦ_{0}^{2}, where k_{B} is Boltzmann's constant, T the absolute temperature, and Φ_{0} the flux quantum. These results are interpreted by introducing into the phenomenological model of weakly connected superconducting rings a continuous time dependence of the quantum states.
 Publication:

Physical Review
 Pub Date:
 March 1968
 DOI:
 10.1103/PhysRev.167.418
 Bibcode:
 1968PhRv..167..418Z