Josephson junction with variable thickness of the dielectric layer

Dobrowolski, Tomasz; Jarmoliński, A.

doi:10.1103/physreve.101.052215

Cited by 5 publications

(2 citation statements)

References 78 publications

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“…In this regard, an intriguing open challenge is the experimental detection of breathers in long Josephson junctions (LJJs) [11]. Indeed, while kinks (or fluxons, since they represent magnetic flux quanta in LJJs) are readily trackable [12,13] and can nowdays be exploited in various ways [14,15,16,17,18,19,20,21,22,23,24], breathers (i.e., kink-antikink oscillatory bound states) have yet to be observed, despite plenty of theoretical works on the subject [25,26,27,28,29,30,31,32,33]. The main problems connected with the breathers' detection are that [25,29,30] (i) time-averaged voltage measurements cannot probe them due to their rapid pulsations, and (ii) dissipation leads to their radiative decay.…”

Section: Introductionmentioning

confidence: 99%

Breather dynamics in a stochastic sine-Gordon equation: evidence of noise-enhanced stability

Santis¹,

Guarcello²,

Spagnolo³

et al. 2022

Preprint

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The dynamics of sine-Gordon breathers is studied in the presence of dissipative and stochastic perturbations. Taking a stationary breather with a random phase value as the initial state, the performed simulations demonstrate that a spatially-homogeneous noisy source can make the oscillatory excitation more stable, i.e., it enables the latter to last significantly longer than it would in a noise-free scenario. Both the frequency domain and the localization of energy are examined to document the effectiveness of the noise-enhanced stability phenomenon, which emerges as a nonmonotonic behavior of an average characteristic time for the breather as a function of the noise intensity. The influence of the mode's starting frequency on the results and their robustness against an additional thermal background are also addressed.

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Section: Introductionmentioning

confidence: 99%

Breather dynamics in a stochastic sine-Gordon equation: evidence of noise-enhanced stability

Santis¹,

Guarcello²,

Spagnolo³

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…If the thickness of the dielectric layer in the junction is position dependent then the kink experiences the effective potential originating in heterogeneities present in the system [16]. The value of transmission critical current in this case is strictly determined by the parameters of the system.…”

Section: Introductionmentioning

confidence: 99%