Preprints

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2019-03-25
09:45
OpenAccess [FZJ-2019-02066] Preprint
et al
Excitons in InGaAs Quantum Dots without Electron Wetting Layer States
The Stranski-Krastanov (SK) growth-mode facilitates the self-assembly of quantum dots (QDs) using lattice-mismatched semiconductors, for instance InAs and GaAs. SK QDs are defect-free and can be embedded in heterostructures and nano-engineered devices. [...]
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2019-03-25
09:34
OpenAccess [FZJ-2019-02065] Preprint
et al
Transfer of a quantum state from a photonic qubit to a gate-defined quantum dot
Interconnecting well-functioning, scalable stationary qubits and photonic qubits could substantially advance quantum communication applications and serve to link future quantum processors. Here, we present two protocols for transferring the state of a photonic qubit to a single-spin and to a two-spin qubit hosted in gate-defined quantum dots (GDQD). [...]
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2019-03-21
09:32
[FZJ-2019-02007] Preprint
et al
A Machine Learning Approach for Automated Fine-Tuning of Semiconductor Spin Qubits
ddc:530
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2019-03-08
15:19
OpenAccess [FZJ-2019-01790] Preprint
et al
Dense Fiber Modeling for 3D-Polarized Light Imaging Simulations
3D-Polarized Light Imaging (3D-PLI) is a neuroimaging technique used to study the structural connectivity of the human brain at the meso- and microscale. In 3D-PLI, the complex nerve fiber architecture of the brain is characterized by 3D orientation vector fields that are derived from birefringence measurements of unstained histological brain sections by means of an effective physical model. [...]
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2019-01-25
20:28
OpenAccess [FZJ-2019-00785] Preprint
et al
The DEEP-ER project: I/O and resiliency extensions for the Cluster-Booster architecture
The recently completed research project DEEP-ER has developed a variety of hardware and software technologies to improve the I/O capabilities of next generation high-performance computers, and to enable applications recovering from the larger hardware failure rates expected on these machines.The heterogeneous Cluster-Booster architecture – first introduced in the predecessor DEEP project – has been extended by a multi-level memory hierarchy employing non-volatile and network-attached memory devices. Based on this hardware infrastructure, an I/O and resiliency software stack has been implemented combining and extending well established libraries and software tools, and sticking to standard user-interfaces. [...]
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2019-01-25
19:19
OpenAccess [FZJ-2019-00778] Preprint
et al
Self-consistent formulations for stochastic nonlinear neuronal dynamics
Neural dynamics is often investigated with tools from bifurcation theory. However, many neuron models are stochastic, mimicking fluctuations in the input from unknown parts of the brain or the spiking nature of input signals. [...]
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2019-01-17
10:12
[FZJ-2019-00452] Preprint

Improving Superconducting Qubits - Understanding Decoherence
GIT 3, 28-30 ()
ddc:600
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2019-01-17
09:43
OpenAccess [FZJ-2019-00442] Preprint/Book
et al
Novel physics opportunities at the HESR-Collider with PANDA at FAIR
Cornell, High Energy Physics - Phenomenology ()
Exciting new scientific opportunities are presented for the PANDA detector at the High Energy Storage Ring in the redefined p_bar p(A) collider mode, HESR-C, at the Facility for Antiproton and Ion Research(FAIR) in Europe. The high luminosity, L = 10^31 cm^-2 s^-1, and a wide range of intermediate and high energies, sqrt(sNN) up to 30 GeV for p_bar p(A) collisions will allow to explore a wide range of exciting topics in QCD, including the study of the production of excited open charm and bottom states, nuclear bound states containing heavy (anti)quarks, the interplay of hard and soft physics in the dilepton production, andthe exploration of the regime where gluons - but not quarks - experience strong interaction..
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2019-01-15
13:25
OpenAccess [FZJ-2019-00286] Preprint
et al
Diattenuation Imaging reveals different brain tissue properties
()
When transmitting polarised light through histological brain sections, different types of diattenuation (polarisation-dependent attenuation of light) can be observed: In some brain regions, the light is minimally attenuated when it is polarised parallel to the nerve fibres (referred to as D+), in others, it is maximally attenuated (referred to as D-). The underlying mechanisms of these effects and their relationship to tissue properties were so far unknown. [...]
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ddc:910
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2019-01-15
13:19
OpenAccess [FZJ-2019-00285] Preprint
et al
Transmittance assisted interpretation of 3D nerve fibre architectures
()
Transmission microscopy measurements of histological brain sections provide usually only 2D (in-plane) information about the spatial nerve fibre architecture. To access the third dimension (out-of-plane orientation) of the nerve fibres, more advanced techniques are required, such as Three-dimensional Polarized Light Imaging (3D-PLI) which uses birefringence measurements to derive the 3D fibre orientations. [...]
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