Macroscopic manifestations of quantum noise

Hermann Grabert, Gert‐Ludwig Ingold

The effects of Macroscopic Quantum Tunneling (MQT) and Coulomb Blockade (CB) in Josephson junctions are of considerable significance both for the manifestations of quantum mechanics on the macroscopic scale and potential technological applications. These two complementary effects are shown to be clearly distinguishable from the associated noise spectra. The current noise is determined exactly and a rather sharp crossover between flux noise in the MQT and charge noise in the CB regions is found as the applied voltage is changed. Related results hold for the voltage noise in current-biased junctions.

J. C. Garrison, R. Y. Chiao

W. H. Louisell

N. Fabricius, Kurt Nattermann, Dietrich von der Linde

The statistical distribution of the Stokes pulse energy is measured for transient stimulated Raman scattering in pressurized hydrogen gas. Large fluctuations of the Stokes energy obeying an exponential distribution law are observed. These macroscopic energy fluctuations are caused by quantum noise in the initial state of the system.

François Chapeau-Blondeau

Katsumi Midorikawa, Hideo Tashiro, Yasuhiro Akiyama +1 more

Stimulated Raman scattering (SRS) is one of the ideal systems which provide a macroscopic manifestation of quantum fluctuation associated with spontaneous noise.