Detection of signals in presence of noise through Josephson junction switching currents
Abstract
Josephson junctions can be employed to reveal a sinusoidal signal in presence of Gaussian noise. To mimic realistic setups, the detection is performed linearly ramping the bias current until a switch to the finite voltage occurs; the analysis of the resulting switching currents can be exploited to decide about the presence of the harmonic drive. The signal is applied in two conditions: with an unknown initial phase (incoherent strategy) and with a known initial phase (coherent strategy). In both conditions, the analysis of the efficiency of the detection, performed through the signal-to-noise ratio, as estimated by the Kumar-Carrol index, shows that the dependence upon the Josephson junction ramp rate is beneficial, especially for relatively fast speed. One can conclude that the collection of the switching currents is a robust technique, and thus it is possible to exploit the advantages of a predetermined finite time to collect the data.
Versions
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BibTeX
@misc{pountougnigni2026detection,
title = {{Detection of signals in presence of noise through Josephson junction switching currents}},
author = {O. V. Pountougnigni and R. Yamapi and C. Tchawoua and V. Pierro and G. Filatrella},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.24533},
eprint = {2609.24533},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.24533},
note = {CC BY-NC-ND 4.0},
}
RIS
TY - UNPB
TI - Detection of signals in presence of noise through Josephson junction switching currents
AU - O. V. Pountougnigni
AU - R. Yamapi
AU - C. Tchawoua
AU - V. Pierro
AU - G. Filatrella
PY - 2026
DA - 2026/09/21
PB - arXiv
DO - 10.48550/arxiv.2609.24533
UR - https://arxiv.org/abs/2609.24533
AB - Josephson junctions can be employed to reveal a sinusoidal signal in presence of Gaussian noise. To mimic realistic setups, the detection is performed linearly ramping the bias current until a switch to the finite voltage occurs; the analysis of the resulting switching currents can be exploited to decide about the presence of the harmonic drive. The signal is applied in two conditions: with an unknown initial phase (incoherent strategy) and with a known initial phase (coherent strategy). In both conditions, the analysis of the efficiency of the detection, performed through the signal-to-noise ratio, as estimated by the Kumar-Carrol index, shows that the dependence upon the Josephson junction ramp rate is beneficial, especially for relatively fast speed. One can conclude that the collection of the switching currents is a robust technique, and thus it is possible to exploit the advantages of a predetermined finite time to collect the data.
ER -