Quantum fluctuations in Josephson junction comparators.

  title={Quantum fluctuations in Josephson junction comparators.},
  author={Thomas J Walls and Timur V. Filippov and Konstantin K. Likharev},
  journal={Physical review letters},
  volume={89 21},
We have developed a method for calculation of quantum fluctuation effects, in particular, of the uncertainty zone developing at the potential curvature sign inversion, for a damped harmonic oscillator with arbitrary time dependence of frequency and for arbitrary temperature, within the Caldeira-Leggett model. The method has been applied to the calculation of the gray zone width Delta Ix of Josephson-junction balanced comparators. The calculated temperature dependence of Delta Ix in the range 1… CONTINUE READING