Edouard B. Sonin
Racah Institute of Physics, Hebrew University of Jerusalem, Givat Ram, Jerusalem 91904, Israel
Theory and experiment have demonstrated that the Coulomb blockade of a mesoscopic Josephson junction in high-impedance environment can be strongly suppressed by shot noise from an adjacent junction.
1 The effect is very sensitive to asymmetry of non-Gaussian noise and therefore provides valuable information on odd moments, which it is difficult to obtain with other methods. The present report extends the theoretical analysis on other types of junction (normal tunnel junction) and of noise (phase noise of the monochromatic microwave). It is shown that at high noise current its effect on the IV curve of the
Coulomb blockaded junction is strongly different for Poissonian statistics and for a periodic sequence of current pulses. This demonstates sensitivity to the full counting statistics of the electron transport.
Altogether it proves that a Coulomb blockaded tunnel junction in high impedance environment can be used as an effective noise probe.
Using duality relations the effect of shot noise on the superconducting Josephson junction has been investigated in the strong Josephson coupling limit. The analysis shows that this junction can also be used for noise detection. There are theoretical evidences that in this regime the time necessary for an electron to cross the junction can be measured experimentally.
1 R.K. Lindell et al.
, Phys. Rev. Lett.
93 , 197002 (2004); E.B. Sonin, Phys. Rev. B 70 , 140506(R)
(2004).
Sorting category: Da Conducting electrons in condensed matter
Keywords: Coulomb blockade, shot noise, full counting statistics, tunnel junction
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