Abstract
It is shown that the low-frequency spectral density of the voltage noise in a current-biased Josephson junction with critical current , shunt resistance , and small capacitance is in the limit and , where is the voltage and is the current. The noise arises from zero-point current fluctuations in the shunt resistor. The rounding of the current-voltage characteristic caused by the quantum fluctuations and the effects of nonzero junction capacitance are calculated.
- Received 25 August 1980
DOI:https://doi.org/10.1103/PhysRevLett.45.2132
©1980 American Physical Society