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## Voltage Noise in a Superconducting Wire with a Constriction

Journal of Superconductivity and Novel Magnetism. 2018. Vol. 31. No. 3. P. 711-714.

We analyze voltage fluctuations in superconducting nanowires with constrictions. We argue that quantum phase slips occurring in the constriction area are responsible for both equilibrium and non-equilibrium voltage noise in such systems. We evaluate the power spectrum of the voltage noise identifying its non-trivial dependence on both frequency and external bias.

Priority areas:
mathematics

Language:
English

Semenov A. G., Zaikin A., Physical Review B: Condensed Matter and Materials Physics 2016 Vol. 94 No. 1 P. 014512-1 -014512-7

Quantum phase slips (QPSs) generate voltage fluctuations in superconducting nanowires. Employing the Keldysh technique and making use of the phase-charge duality arguments, we develop a theory of QPS-induced voltage noise in such nanowires. We demonstrate that quantum tunneling of the magnetic flux quanta across the wire yields quantum shot noise which obeys Poisson statistics and ...

Added: September 14, 2016

A. G. Semenov, A. D. Zaikin, Physics-Uspekhi 2022 Vol. 65 No. 9 P. 883-919

We review some recent developments in the field of quasi-one-dimensional superconductivity. We demonstrate that low temperature properties of superconducting nanowires are essentially determined by quantum fluctuations. Smooth (Gaussian) fluctuations of the superconducting phase (also associated with plasma modes propagating along a wire) may significantly affect the electron density of states in such nanowires and induce ...

Added: January 29, 2023

Teixeira Saraiva T., Vagov A., Cavalcanti P. J. et al., Physical Review Letters 2020 Vol. 125 No. 21 Article 217003

It is well known that superconductivity in quasi-one-dimensional (Q1D) materials is hindered by large fluctuations of the order parameter. They reduce the critical temperature and can even destroy the superconductivity altogether. Here it is demonstrated that the situation changes dramatically when a Q1D pair condensate is coupled to a higher-dimensional stable one, as in recently ...

Added: November 19, 2020

Denisov A., Bubis A., Piatrusha S. et al., Nanomaterials 2022 Vol. 12 No. 9 Article 1461

Mesoscopic superconductivity deals with various quasiparticle excitation modes, only one of them—the charge-mode—being directly accessible for conductance measurements due to the imbalance in populations of quasi-electron and quasihole excitation branches. Other modes carrying heat or even spin, valley etc. currents populate the branches equally and are charge-neutral, which makes them much harder to control. This ...

Added: April 3, 2023

Golubev D., Zaikin A., Beilstein Journal of Nanotechnology 2023 Vol. 14 P. 61-67

Electrons in two different normal metallic electrodes attached to a sufficiently thin superconducting island may become entangled due to the effect of Cooper pair splitting. This phenomenon is of fundamental importance and may also have serious implications for developing quantum communication technologies. One way to identify Cooper pair splitting is to analyze long-range cross correlations ...

Added: April 17, 2024

Kolesnikov A. L., Georgi N., Budkov Y. et al., Langmuir 2018 Vol. 34 No. 25 P. 7575-7584

Here, we present a new model of adsorption-induced deformation of mesoporous solids. The model is based on a simplified version of local density functional theory in the framework of solvation free energy. Instead of density, which is treated as constant here, we used film thickness and pore radius as order parameters. This allows us to ...

Added: July 1, 2018

Latyshev A., Semenov A. G., Zaikin A., Beilstein Journal of Nanotechnology 2022 Vol. 13 P. 292-297

We investigate plasma oscillations in long electromagnetically coupled superconducting nanowires. We demonstrate that in the presence of inter-wire coupling plasma modes in each of the wires get split into two “new” modes propagating with different velocities across the system. These plasma modes form an effective dissipative quantum environment interacting with electrons inside both wires and ...

Added: June 11, 2022

M. : Association of graduates and employees of AFEA named after prof. Zhukovsky, 2018

The materials of The International Scientific – Practical Conference is presented below.
The Conference reflects the modern state of innovation in education, science, industry and social-economic sphere, from the standpoint of introducing new information technologies.
It is interesting for a wide range of researchers, teachers, graduate students and professionals in the field of innovation and information technologies. ...

Added: May 24, 2018

Kolesnikov A. L., Budkov Y., Gor G., Journal of Physical Chemistry C 2020 Vol. 124 No. 37 P. 20046-20054

Adsorption of fluids in nanoporous media causes mechanical stresses which results in deformation. This phenomenon is ubiquitous and its magnitude depends on the pore size and geometry. Adsorption and adsorption-induced deformation are typically modeled in slit-shape or convex (cylindrical or spherical) pores. However, many porous materials are composed of spherical grains, so that the pores ...

Added: August 13, 2020

СПб. : ООО "Издательство ВВМ", 2019

Сборник содержит доклады, представленные на XXIII Всероссийскую ежегодную конференцию по физике Солнца «Солнечная и солнечно-земная физика – 2019» (7 – 11 октября 2019 года, ГАО РАН, Санкт-Петербург). Конференция проводилась Главной (Пулковской) астрономической обсерваторией РАН при финансовой поддержке Российского фонда фундаментальных исследований (грант 19-02-20010), секции «Солнце» Научного совета по астрономии РАН и секции «Плазменные процессы в ...

Added: December 25, 2019

Semenov A. G., Zaikin A., Physical Review B: Condensed Matter and Materials Physics 2019 Vol. 99 No. 9 P. 094516-1-094516-9

We work out a microscopic theory describing complete statistics of voltage fluctuations generated by quantum phase slips (QPS) in superconducting nanowires. We evaluate the cumulant generating function and demonstrate that shot noise of the voltage as well as the thir d and all higher voltage cumulants differ from zero only due to the presence of ...

Added: October 31, 2019

Budkov Y., Physical Chemistry Chemical Physics 2020 Vol. 22 P. 14756-14772

In this article, I summarize my theoretical developments in the statistical field theory of salt solutions of zwitterionic and multipolar molecules. Based on the Hubbard-Stratonovich integral transformation, I represent configuration integrals of dilute salt solutions of zwitterionic and multipolar molecules in the form of functional integrals over the space-dependent fluctuating electrostatic potential. In the mean-field ...

Added: June 11, 2020

Bubis A. V., E. V. Shpagina, Nasibulin A. G. et al., Physical Review B: Condensed Matter and Materials Physics 2021 Vol. 104 No. 12 Article 125409

We investigate diffusive nanowire-based structures with two normal terminals on the sides and a central
superconducting island in the middle, which is either grounded or floating. Using a semiclassical calculation
we demonstrate that both device layouts permit a quantitative measurement of the energy dependent subgap
thermal conductance Gth from the spectral density of the current noise. In the ...

Added: April 3, 2023

Budkov Y., Journal of Physics: Condensed Matter 2020 Vol. 32 No. 5 P. 055101-1-055101-8

In this paper, we formulate a field-theoretical model of dilute salt solutions of electrically neutral spherical colloid particles. Each colloid particle consists of a 'central' charge that is situated at the center and compensating peripheral charges (grafted to it) that are fixed or fluctuating relative to the central charge. In the framework of the random ...

Added: October 12, 2019

Budkov Y., М. : ЛЕНАНД, 2020

Within the presented monograph for the first time statistical approaches, based on the self-consistent field theory, were presented for the theoretical description of the thermodynamic properties of the ion-molecular systems (electrolyte solutions, ionic liquids, dielectric polymers and metal-organic frameworks) in the bulk solution and at the interfaces with the account for their molecular structure. In ...

Added: November 18, 2019

Tikhonov E., Denisov A. O., Piatrusha S. U. et al., Physical Review B: Condensed Matter and Materials Physics 2020 Vol. 102 P. 1-7

Shot-noise measurements are widely used for the characterization of nonequilibrium configurations in
electronic conductors. The recently introduced quantum tomography approach was implemented for the studies
of electronic wave functions of few-electron excitations created by periodic voltage pulses in phase-coherent
ballistic conductors based on the high-quality GaAs two-dimensional electron gas. Still relying on the manifestation
of Fermi correlations in noise, ...

Added: January 26, 2021

Doronin S., Budkov Y., Itkis D., Carbon 2021 Vol. 175 P. 202-214

Based on the quantum-mechanical theory of electron transfer (ET), the parameter was proposed to describe the electrochemical activity of doped graphenes. The parameter is calculated using the density of states (DOS), local density of state (LDOS) values, which are in turn obtained from the density functional theory (DFT) calculations and reorganization energies of redox system. ...

Added: January 12, 2021

Alex Latyshev, Andrew G. Semenov, Andrei D. Zaikin, Condensed Matter 2023 Vol. 8 No. 1 Article 5

Employing charge–flux duality for Josephson junctions and superconducting nanowires, we predict a novel effect of fluxon cotunneling in SQUID-like nanorings. This process is strictly dual to that of Cooper pair cotunneling in superconducting transistors formed by a pairs of Josephson tunnel junctions connected in series. Cooper pair cotunneling is known to lift Coulomb blockade in ...

Added: March 16, 2024

Budkov Y., Journal of Physics: Condensed Matter 2018 Vol. 30 No. 34 P. 1-9

We present a nonlocal statistical field theory of a dilute electrolyte solution with a small
additive of dipolar particles. We postulate that every dipolar particle is associated with an
arbitrary probability distribution function (PDF) of distance between its charge centers.
Using the standard Hubbard–Stratonovich transformation, we represent the configuration
integral of the system in the functional integral form. We ...

Added: July 31, 2018

Kryzhanovskaya N., Scherbak, S., Maximov M. et al., Journal of the Optical Society of America B: Optical Physics 2019 Vol. 36 No. 8 P. 2285-2291

Microdisk lasers having III-V core coated with TiO2 shell are studied under optical pumping. Initial core microdisk lasers with 5-10 µm diameter comprising five layers of InAs/In0.15Ga0.85As quantum dots demonstrate room temperature lasing with excellent characteristics at the ground state optical transition in the 1.28-1.30 µm spectral range. Deposition of the TiO2 dielectric shell results ...

Added: October 1, 2020

Kolesnikov A. L., Budkov Y., Mollmer J. et al., Journal of Physical Chemistry C 2019 Vol. 123 No. 16 P. 10333-10338

In this manuscript, we study the electrically induced breathing of Metal-Organic Framework (MOF) within a 2D lattice model. The Helmholtz free energy of the MOF in electric eld consists of two parts: the electrostatic energy of the dielectric body in the external electric eld and elastic energy of the framework. The rst contribution is calculated ...

Added: April 1, 2019

Switzerland : Springer, 2020

This book comprises high-quality, refereed research papers presented at the 2019 International Symposium on Computer Science, Digital Economy and Intelligent Systems (CSDEIS2019): The symposium, held in Moscow, Russia, on 4–6 October 2019, was organized jointly by Moscow State Technical University and the International Research Association of Modern Education and Computer Science. The book discusses the ...

Added: March 15, 2020

Prazdnichnykh A., Glazov M., Ren L. et al., Physical Review B: Condensed Matter and Materials Physics 2021 Vol. 103 No. 8 P. 085302-1-085302-12

The exciton valley dynamics in van der Waals heterostructures with transition metal dichalcogenide monolayers is driven by the long-range exchange interaction between the electron and the hole in the exciton. It couples the states active in the opposite circular polarizations resulting in the longitudinal-transverse splitting of excitons propagating in the monolayer plane. Here we study ...

Added: March 5, 2021

Zhukov A. A., Shapiro D. S., Pogosov W. V. et al., Physical Review B: Condensed Matter and Materials Physics 2016 Vol. 93 P. 063845

Superconducting circuits provide a new platform for study of nonstationary cavity QED phenomena. An example of such a phenomenon is the dynamical Lamb effect, which is the parametric excitation of an atom due to nonadiabatic modulation of its Lamb shift. This effect was initially introduced for a natural atom in a varying cavity, while we ...

Added: October 18, 2016