Stabilization Effects of Dichotomous Noise on the Lifetime of theSuperconducting State in a Long Josephson Junction
We investigate the superconducting lifetime of a long overdamped current-biasedJosephson junction, in the presence of telegraph noise sources. The analysis is performed byrandomly choosing the initial condition for the noise source. However, in order to investigatehow the initial value of the dichot...
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MDPI AG
2015-05-01
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| Series: | Entropy |
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| Online Access: | http://www.mdpi.com/1099-4300/17/5/2862 |
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| author | Claudio Guarcello Davide Valenti Angelo Carollo Bernardo Spagnolo |
| author_facet | Claudio Guarcello Davide Valenti Angelo Carollo Bernardo Spagnolo |
| author_sort | Claudio Guarcello |
| collection | DOAJ |
| description | We investigate the superconducting lifetime of a long overdamped current-biasedJosephson junction, in the presence of telegraph noise sources. The analysis is performed byrandomly choosing the initial condition for the noise source. However, in order to investigatehow the initial value of the dichotomous noise affects the phase dynamics, we extend ouranalysis using two different fixed initial values for the source of random fluctuations. In ourstudy, the phase dynamics of the Josephson junction is analyzed as a function of the noisesignal intensity, for different values of the parameters of the system and external drivingcurrents. We find that the mean lifetime of the superconductive metastable state as a functionof the noise intensity is characterized by nonmonotonic behavior, strongly related to thesoliton dynamics during the switching towards the resistive state. The role of the correlationtime of the noise source is also taken into account. Noise-enhanced stability is observed inthe investigated system. |
| first_indexed | 2024-04-11T22:18:37Z |
| format | Article |
| id | doaj.art-e7e55994aaf1403fbf259f2eee7ef36c |
| institution | Directory Open Access Journal |
| issn | 1099-4300 |
| language | English |
| last_indexed | 2024-04-11T22:18:37Z |
| publishDate | 2015-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Entropy |
| spelling | doaj.art-e7e55994aaf1403fbf259f2eee7ef36c2022-12-22T04:00:17ZengMDPI AGEntropy1099-43002015-05-011752862287510.3390/e17052862e17052862Stabilization Effects of Dichotomous Noise on the Lifetime of theSuperconducting State in a Long Josephson JunctionClaudio Guarcello0Davide Valenti1Angelo Carollo2Bernardo Spagnolo3Dipartimento di Fisica e Chimica, Interdisciplinary Theoretical Physics Group, Università di Palermo and CNISM, Unità di Palermo, Viale delle Scienze, Edificio 18, I-90128 Palermo, ItalyDipartimento di Fisica e Chimica, Interdisciplinary Theoretical Physics Group, Università di Palermo and CNISM, Unità di Palermo, Viale delle Scienze, Edificio 18, I-90128 Palermo, ItalyDipartimento di Fisica e Chimica, Interdisciplinary Theoretical Physics Group, Università di Palermo and CNISM, Unità di Palermo, Viale delle Scienze, Edificio 18, I-90128 Palermo, ItalyDipartimento di Fisica e Chimica, Interdisciplinary Theoretical Physics Group, Università di Palermo and CNISM, Unità di Palermo, Viale delle Scienze, Edificio 18, I-90128 Palermo, ItalyWe investigate the superconducting lifetime of a long overdamped current-biasedJosephson junction, in the presence of telegraph noise sources. The analysis is performed byrandomly choosing the initial condition for the noise source. However, in order to investigatehow the initial value of the dichotomous noise affects the phase dynamics, we extend ouranalysis using two different fixed initial values for the source of random fluctuations. In ourstudy, the phase dynamics of the Josephson junction is analyzed as a function of the noisesignal intensity, for different values of the parameters of the system and external drivingcurrents. We find that the mean lifetime of the superconductive metastable state as a functionof the noise intensity is characterized by nonmonotonic behavior, strongly related to thesoliton dynamics during the switching towards the resistive state. The role of the correlationtime of the noise source is also taken into account. Noise-enhanced stability is observed inthe investigated system.http://www.mdpi.com/1099-4300/17/5/2862long Josephson junctionmetastabilitydichotomous noisemean switchingtimenonlinear relaxation timenoise enhanced stabilitynonequilibrium statisticalmechanics |
| spellingShingle | Claudio Guarcello Davide Valenti Angelo Carollo Bernardo Spagnolo Stabilization Effects of Dichotomous Noise on the Lifetime of theSuperconducting State in a Long Josephson Junction Entropy long Josephson junction metastability dichotomous noise mean switchingtime nonlinear relaxation time noise enhanced stability nonequilibrium statisticalmechanics |
| title | Stabilization Effects of Dichotomous Noise on the Lifetime of theSuperconducting State in a Long Josephson Junction |
| title_full | Stabilization Effects of Dichotomous Noise on the Lifetime of theSuperconducting State in a Long Josephson Junction |
| title_fullStr | Stabilization Effects of Dichotomous Noise on the Lifetime of theSuperconducting State in a Long Josephson Junction |
| title_full_unstemmed | Stabilization Effects of Dichotomous Noise on the Lifetime of theSuperconducting State in a Long Josephson Junction |
| title_short | Stabilization Effects of Dichotomous Noise on the Lifetime of theSuperconducting State in a Long Josephson Junction |
| title_sort | stabilization effects of dichotomous noise on the lifetime of thesuperconducting state in a long josephson junction |
| topic | long Josephson junction metastability dichotomous noise mean switchingtime nonlinear relaxation time noise enhanced stability nonequilibrium statisticalmechanics |
| url | http://www.mdpi.com/1099-4300/17/5/2862 |
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