Measuring the distribution of current fluctuations through a Josephson junction with very short current pulses
arXiv:0801.3735 · doi:10.1209/0295-5075/83/47009
Abstract
We propose to probe the distribution of current fluctuations by means of the escape probability histogram of a Josephson junction (JJ), obtained using very short bias current pulses in the adiabatic regime, where the low-frequency component of the current fluctuations plays a crucial role. We analyze the effect of the third cumulant on the histogram in the small skewness limit, and address two concrete examples assuming realistic parameters for the JJ. In the first one we study the effects due to fluctuations produced by a tunnel junction, finding that the signature of higher cumulants can be detected by taking the derivative of the escape probability with respect to current. In such a realistic situation, though, the determination of the whole distribution of current fluctuations requires an amplification of the cumulants. As a second example we consider magnetic flux fluctuations acting on a SQUID produced by a random telegraph source of noise.
6 pages, 6 figures; final version
References in corpus (20)
- Electron Counting Statistics and Coherent States of Electric Current
- Counting statistics of single-electron transport in a quantum dot
- Environmental effects in the third moment of voltage fluctuations in a tunnel junction
- Measurement of Counting Statistics of Electron Transport in a Tunnel Junction
- Counting statistics and super-Poissonian noise in a quantum dot
- Coherent oscillations in a superconducting multi-level quantum system
- Josephson junctions as threshold detectors for full counting statistics
- Temperature dependent third cumulant of tunneling noise
- A Josephson junction as a detector of Poissonian charge injection
- Wide-band detection of the third moment of shot noise by a hysteretic Josephson junction
- Stochastic dynamics of a Josephson junction threshold detector
- Shot-noise-driven escape in hysteretic Josephson junctions
- Detecting charge noise with a Josephson junction: A problem of thermal escape in presence of non-Gaussian fluctuations
- Feedback of the electromagnetic environment on current and voltage fluctuations out of equilibrium
- Measuring non-Gaussian fluctuations through incoherent Cooper pair current
- How to detect the fourth order cumulant of electrical noise
- Decoherence processes in a current biased dc SQUID
- Qubits as devices to detect the third moment of current fluctuations
- Nanosecond quantum state detection in a current biased dc SQUID
- Detecting Current Noise with a Josephson Junction in the Macroscopic Quantum Tunneling Regime