Open Access

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2019-03-21
13:39
OpenAccess [FZJ-2019-02029] Contribution to a book

Noise-Free Rapid Approach to Solve Kinetic Equations for Hot Atoms in Fusion Plasmas
Plasma Science and Technology - Basic Fundamentals and Modern Applications / Jelassi, Haikel (Editor) ; : IntechOpen, , Chapter 1 ; ISBN: 978-1-78985-239-4 ; doi:10.5772/intechopen.72359 London : IntechOpen 1-20 () [10.5772/intechopen.76681]
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2019-03-21
11:31
OpenAccess [FZJ-2019-02023] Journal Article
et al
Solar Neutrinos Spectroscopy with Borexino Phase-II
Universe 4(11), 118 - () [10.3390/universe4110118]
Solar neutrinos have played a central role in the discovery of the neutrino oscillation mechanism. They still are proving to be a unique tool to help investigate the fusion reactions that power stars and further probe basic neutrino properties [...]
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2019-03-21
11:26
OpenAccess [FZJ-2019-02019] Journal Article

Solar neutrino analysis with the Borexino detector
The first simultaneous measurement of the interaction rates of pp, 7Be, and pep solar neutrinos has been completed using the Borexino data and will soon be published. The results were obtained by performing a global fit to the Borexino Phase-II data in an extended energy range (0.186-2.97 MeV). [...]
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2019-03-21
09:56
OpenAccess [FZJ-2019-02014] Journal Article
et al
Interfacing spin qubits in quantum dots and donors—hot, dense, and coherent
Semiconductor spins are one of the few qubit realizations that remain a serious candidate for the implementation of large-scale quantum circuits. Excellent scalability is often argued for spin qubits defined by lithography and controlled via electrical signals, based on the success of conventional semiconductor integrated circuits. [...]
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2019-03-21
09:40
Embargoed OpenAccess [FZJ-2019-02011] Journal Article
et al
A micro-SQUID with dispersive readout for magnetic scanning microscopy
Applied physics reviews 112(25), 252601 - () [10.1063/1.5030489]
We have designed and characterized a micro-SQUID with dispersive readout for use in low temperature scanning probe microscopy systems. The design features a capacitively shunted RF SQUID with a tunable resonance frequency from 5 to 12 GHz, micrometer spatial resolution, and integrated superconducting coils for local application of magnetic fields. [...]
Published on 2018-06-20. Available in OpenAccess from 2019-06-20.: Download fulltextPDF Download fulltextPDF (PDFA);
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2019-03-21
09:39
OpenAccess [FZJ-2019-02010] Journal Article
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Calculation of tunnel couplings in open gate-defined disordered quantum dot systems
Quantum computation based on semiconductor electron-spin qubits requires high control of tunnel couplings between the quantum dots and the electron reservoirs. Potential disorder and the increasing complexity of the two-dimensional gate-defined quantum computing devices set high demands on the gate design and the voltage tuning of the tunnel barriers. [...]
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2019-03-21
09:38
Embargoed OpenAccess [FZJ-2019-02009] Journal Article
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30 GHz-voltage controlled oscillator operating at 4 K
Solid-state qubit manipulation and read-out fidelities are reaching fault-tolerance, but quantum error correction requires millions of physical qubits and therefore a scalable quantum computer architecture. To solve signal-line bandwidth and fan-out problems, microwave sources required for qubit manipulation might be embedded close to the qubit chip, typically operating at temperatures below 4 K. [...]
Published on 2018-11-13. Available in OpenAccess from 2019-11-13.: 1804.09522 - Download fulltextPDF Download fulltextPDF (PDFA); 1.5038258 - Download fulltextPDF Download fulltextPDF (PDFA);
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2019-03-21
09:37
OpenAccess [FZJ-2019-02008] Journal Article
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Tuning Methods for Semiconductor Spin Qubits
We present efficient methods to reliably characterize and tune gate-defined semiconductor spin qubits. Our methods are developed for double quantum dots in GaAs heterostructures, but they can easily be adapted to other quantum-dot-based qubit systems. [...]
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2019-03-21
09:11
OpenAccess [FZJ-2019-02006] Journal Article
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Modelling of tungsten erosion and deposition in the divertor of JET-ILW in comparison to experimental findings
The erosion, transport and deposition of tungsten in the outer divertor of JET-ILW has been studied for an H-Mode discharge with low frequency ELMs. For this specific case with an inter-ELM electron temperature at the strike point of about 20 eV, tungsten sputtering between ELMs is almost exclusively due to beryllium impurity and self-sputtering. [...]
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2019-03-21
05:48
OpenAccess [FZJ-2019-01999] Journal Article
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Direct Assessment of Tube Dilation in Entangled Polymers
A key ingredient within theories focusing on the rheology of entangled polymers is the way how the topological constraints of an entangled chain are lifted by unconstrained segments, i.e., how the constraining tube is dilated. This important question has been addressed by directly measuring the tube diameter d at the scale of the tube by neutron spin echo spectroscopy. [...]
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