Charging of Superconducting Layers in Arrays of Coupled Josephson Junctions for Overcritical Currents

Cuzminschi, Marina; Zubarev, Alexei

doi:10.3390/cryst9070327

Cited by 5 publications

(4 citation statements)

References 34 publications

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“…Second, if the the coupling between the junctions is low, but the dissipation parameter increase over 1, we have another type of IV characteristic without any hysteresis. 5 And in the last case, if the coupling between the junctions is strong enough and the dissipation parameter increase over the critical value specific for this coupling parameter, we can observe branching in the IV characteristic for the overcritical currents.…”

Section: Introductionmentioning

confidence: 84%

“…Theoretical description of the observed phenomena is provided in the article. 5 The additional branch called the traveling wave branch is characterized by lower voltage. More clear, the average voltage on a junction from the stack corresponding to the traveling wave branch is lower than the voltage on a separated junction for the same current.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Study of charge density waves generated in strongly coupled highly dissipative Josephson junctions arrays

Cuzminschi¹,

Zubarev²

2023

Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies XI

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Strongly coupled, highly dissipative arrays of Josephson junctions are characterized by presence of two branches for the currents greater then the critical one in their IV characteristic. Additional branch, called traveling wave branch is characterized by low voltage, generation of charge density waves in the stack. Traveling wave branch appears on the IV characteristic only if coupling and dissipation parameters have the values above their thresholds. In this work we focused on the study of charge density waves behavior in the specified type of Josephson junction arrays in order to explain the stability of the traveling wave branch. Were performed numerical simulations using Capacity Coupled Josephson Junctions with Diffusion Current (CCJJ+DC) model which gives good agreement with the experimental results and were obtained IV-characteristics and charge density temporal evolution profiles for different currents corresponding to traveling wave branch. Was shown that the form of charge density waves changes with the increase of current. Moreover was studied spectral structure of charge density waves and dependence of Lissajous correlations between charge accumulated on the neighbor superconducting layers on the current. thought the stack.

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Section: Introductionmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Study of charge density waves generated in strongly coupled highly dissipative Josephson junctions arrays

Cuzminschi¹,

Zubarev²

2023

Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies XI

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“…Until the last decades of the XX century no experimental implementations of Szilard engine were possible, due to the weak development of micro-technologies and low precision of measurement techniques 13 , 14 . However, with the fast development of nanotechnologies 15 – 17 , enhancement of ion traps technology and implementation of the first quantum computers 18 , the design of the Szilard engine became a practical challenge. Besides the classical schemes of Szilard engine, associated with Maxwell demon, there were proposed memoryless models, where the measurement is used only to localise the particle in its part of the box 19 , 20 .…”

Section: Introductionmentioning

confidence: 99%

Extractable quantum work from a two-mode Gaussian state in a noisy channel

Cuzminschi

Zubarev

Исар

2021

Sci Rep

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We study a Szilard engine based on a Gaussian state of a system consisting of two bosonic modes placed in a noisy channel. As the initial state of the system is taken an entangled squeezed thermal state, and the quantum work is extracted by performing a measurement on one of the two modes. We use the Markovian Kossakowski-Lindblad master equation for describing the time evolution of the open system and the quantum work definition based on the second order Rényi entropy to simulate the engine. We also study the information-work efficiency of the Szilard engine as a function of the system parameters. The efficiency is defined as the ratio of the extractable work averaged over the measurement angle and the erasure work, which is proportional to the information stored in the system. We show that the extractable quantum work increases with the temperature of the reservoir and the squeezing between the modes, average numbers of thermal photons and frequencies of the modes. The work increases also with the strength of the measurement, attaining the maximal values in the case of a heterodyne detection. The extractable work is decreasing by increasing the squeezing parameter of the noisy channel and it oscillates with the phase of the squeezed thermal reservoir. The efficiency mostly has a similar behavior with the extractable quantum work evolution. However information-work efficiency decreases with temperature, while the quantity of the extractable work increases.

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“…Until the last decades of the XX century no experimental implementations of Szilard engine were possible, due to the weak development of micro-technologies and low precision of measurement techniques 13,14 . However, with the fast development of nanotechnologies [15][16][17] , enhancement of ion traps technology and implementation of the first quantum computers 18 , the design of the Szilard engine became a practical challenge. Besides the classical schemes of Szilard engine, associated with Maxwell demon, there were proposed memoryless models, where the measurement is used only to localise the particle in its part of the box 19,20 .…”

Section: Introductionmentioning

confidence: 99%