scholarly journals Nonlocal supercurrent of quartets in a three-terminal Josephson junction

2018 ◽  
Vol 115 (27) ◽  
pp. 6991-6994 ◽  
Author(s):  
Yonatan Cohen ◽  
Yuval Ronen ◽  
Jung-Hyun Kang ◽  
Moty Heiblum ◽  
Denis Feinberg ◽  
...  
Keyword(s):  
Josephson Junction ◽  
Cross Correlation ◽  
Bound State ◽  
Josephson Current ◽  
Nonlinear Regime ◽  
Current Fluctuations ◽  
Andreev Bound State ◽  
Microscopic Origin ◽  
Rule Out ◽  
Made In

A novel nonlocal supercurrent, carried by quartets, each consisting of four electrons, is expected to appear in a voltage-biased three-terminal Josephson junction. This supercurrent results from a nonlocal Andreev bound state (ABS), formed among three superconducting terminals. While in a two-terminal Josephson junction the usual ABS, and thus the dc Josephson current, exists only in equilibrium, the ABS, which gives rise to the quartet supercurrent, persists in the nonlinear regime. In this work, we report such resonance in a highly coherent three-terminal Josephson junction made in an InAs nanowire in proximity to an aluminum superconductor. In addition to nonlocal conductance measurements, cross-correlation measurements of current fluctuations provided a distinctive signature of the quartet supercurrent. Multiple device geometries had been tested, allowing us to rule out competing mechanisms and to establish the underlying microscopic origin of this coherent nondissipative current.

scholarly journals Direct Microwave Measurement of Andreev-Bound-State Dynamics in a Semiconductor-Nanowire Josephson Junction

2018 ◽  
Vol 121 (4) ◽  
Author(s):  
M. Hays ◽  
G. de Lange ◽  
K. Serniak ◽  
D. J. van Woerkom ◽  
D. Bouman ◽  
...  
Keyword(s):  
Josephson Junction ◽  
Bound State ◽  
Microwave Measurement ◽  
Semiconductor Nanowire ◽  
Andreev Bound State

scholarly journals Josephson Current through a Quantum Dot Connected with Superconducting Leads

2019 ◽  
Vol 2019 ◽  
pp. 1-16
Author(s):  
Satoshi Kawaguchi
Keyword(s):  
Quantum Dot ◽  
Coulomb Interaction ◽  
Green's Function ◽  
Electron Correlation ◽  
Bound State ◽  
Josephson Current ◽  
Parameter Range ◽  
Kondo Temperature ◽  
Kondo Physics ◽  
Andreev Bound State

In this study, we consider the Josephson current in a system composed of a superconductor/quantum dot/superconductor junction. In the model, the Coulomb interaction in the quantum dot is taken into consideration, and the Lacroix approximation is applied to study the electron correlation. We derive Green’s function of the quantum dot by applying the Lacroix truncation. Although the Andreev bound state does not occur in our formulations, the π-junction occurs for a restricted parameter range. On comparing the Kondo temperature with that estimated by another method, it is found that our Lacroix approximation does not capture well the Kondo physics in the superconductor/quantum dot/superconductor junction.

New insight into the molecular switch mechanism of human Rho family proteins: shifting a paradigm

2013 ◽  
Vol 394 (1) ◽  
pp. 89-95 ◽  
Author(s):  
Mamta Jaiswal ◽  
Eyad Kalawy Fansa ◽  
Radovan Dvorsky ◽  
Mohammad Reza Ahmadian
Keyword(s):  
Quantitative Analysis ◽  
Bound State ◽  
Molecular Switch ◽  
Nucleotide Exchange ◽  
Gtp Binding ◽  
Switch Mechanism ◽  
Rho Family ◽  
Rho Family Proteins ◽  
Insight Into ◽  
Made In

Abstract Major advances have been made in understanding the structure, function and regulation of the small GTP-binding proteins of the Rho family and their involvement in multiple cellular process and disorders. However, intrinsic nucleotide exchange and hydrolysis reactions, which are known to be fundamental to Rho family proteins, have been partially investigated in the case of RhoA, Rac1 and Cdc42, but for others not at all. Here we present a comprehensive and quantitative analysis of the molecular switch functions of 15 members of the Rho family that enabled us to propose an active GTP-bound state for the rather uncharacterized isoforms RhoD and Rif under equilibrium and quiescent conditions.

scholarly journals Determination of the rotational period of the comet 29P/Schwassmann-Wachmann-1 using dynamics of the dust structures (jets) in the coma

2012 ◽  
Vol 10 (H16) ◽  
pp. 176-176
Author(s):  
Aleksandra Ivanova ◽  
Viktor Afanasiev ◽  
Pavlo Korsun ◽  
Aleksandr Baransky ◽  
Maksim Andreev ◽  
...  
Keyword(s):  
Digital Filters ◽  
Cross Correlation ◽  
Rotation Period ◽  
Correlation Method ◽  
Photometric Data ◽  
Rotational Period ◽  
Water Ice ◽  
Ice Sublimation ◽  
Made In

AbstractWe present analysis of the photometric data of the distant comet 29P/Schwassmann-Wachmann-1, obtained at the 6-m BTA telescope (SAO RAS, Russia) and at the 2-meter telescope Zeiss-2000 (ICAMER, KB). The comet shows significant jets activity at large heliocentric distances, beyond the zone of water ice sublimation. Various digital filters were applied to increase the contrast of the jets and separate them. The rotation period of the nucleus was derived using cross-correlation method. The value of the rotation period is 12.1 ± 1.2 days for observations made in 2008 and 11.7 ± 1.5 days for observations made in 2009.

scholarly journals Singularly Perturbed Fractional Schrödinger Equation Involving a General Critical Nonlinearity

2018 ◽  
Vol 18 (3) ◽  
pp. 487-499 ◽  
Author(s):  
Hua Jin ◽  
Wenbin Liu ◽  
Jianjun Zhang
Keyword(s):  
Variational Approach ◽  
Bound State ◽  
Singularly Perturbed ◽  
Critical Nonlinearity ◽  
Bound State Solution ◽  
Critical Nonlinearities ◽  
Concentration Phenomena ◽  
Fractional Schrödinger Equations ◽  
Concentration Result ◽  
Made In

AbstractIn this paper, we are concerned with the existence and concentration phenomena of solutions for the following singularly perturbed fractional Schrödinger problem:\varepsilon^{2s}(-\Delta)^{s}u+V(x)u=f(u)\quad\text{in }\mathbb{R}^{N},where{N>2s}and the nonlinearityfhas critical growth. By using the variational approach, we construct a localized bound-state solution concentrating around an isolated component of the positive minimum point ofVas{\varepsilon\rightarrow 0}. Our result improves the study made in [X. He and W. Zou, Existence and concentration result for the fractional Schrödinger equations with critical nonlinearities, Calc. Var. Partial Differential Equations 55 2016, 4, Article ID 91], in the sense that, in the present paper, theAmbrosetti–Rabinowitzcondition and themonotonicitycondition on{f(t)/t}are not required.

Andreev bound state in a superconducting double barrier junction: The role of anisotropic dx2−y2-wave pairing potential

2012 ◽  
Vol 152 (24) ◽  
pp. 2133-2137 ◽  
Author(s):  
Shuanwen Jia ◽  
Baolin Ma ◽  
Ke-Wei Wei ◽  
Yanling Yang ◽  
Chunxu Bai
Keyword(s):  
Bound State ◽  
Double Barrier ◽  
Wave Pairing ◽  
Andreev Bound State ◽  
Pairing Potential
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