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  • 2017-2021
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  • Open Access
    Authors: 
    Wu, Junran; Xu, Ke; Chen, Xueyuan; Li, Shangzhe; Zhao, Jichang;
    Publisher: Elsevier BV

    Great research efforts have been devoted to exploiting deep neural networks in stock prediction. While long-range dependencies and chaotic property are still two major issues that lower the performance of state-of-the-art deep learning models in forecasting future price...

  • Publication . Conference object . Article . Preprint . 2021 . Embargo End Date: 01 Jan 2021
    Open Access
    Authors: 
    Meysam Sadeghi; Emil Björnson; Erik G. Larsson; Chau Yuen; Thomas L. Marzetta;
    Publisher: arXiv

    We study joint unicast and multigroup multicast transmission in single-cell massive multiple-input-multiple-output (MIMO) systems, under maximum ratio transmission. For the unicast transmission, the objective is to maximize the weighted sum spectral efficiency (SE) of t...

  • Open Access English
    Authors: 
    Sucharita Chakraborty; Emil Björnson; Luca Sanguinetti;
    Publisher: IEEE Computer Society
    Country: Italy

    Cell-free Massive MIMO systems consist of a large number of geographically distributed access points (APs) that serve users by coherent joint transmission. Downlink power allocation is important in these systems, to determine which APs should transmit to which users and...

  • Open Access English
    Authors: 
    Marc Vila; Chuang-Han Hsu; Jose H. Garcia; L. Antonio Benítez; Xavier Waintal; Sergio O. Valenzuela; Vitor M. Pereira; Stephan Roche;
    Country: Spain
    Project: EC | GrapheneCore2 (785219), EC | GrapheneCore3 (881603), EC | TOCHA (824140)

    The spin polarization induced by the spin Hall effect (SHE) in thin films typically points out of the plane. This is rooted on the specific symmetries of traditionally studied systems, not in a fundamental constraint. Recently, experiments on few-layer ${\rm MoTe}_2$ an...

  • Open Access English
    Authors: 
    Jordi Picó-Cortés; Gloria Platero;
    Publisher: Verein zur Förderung des Open Access Publizierens in den Quantenwissenschaften

    Quantum dot-based quantum computation employs extensively the exchange interaction between nearby electronic spins in order to manipulate and couple different qubits. The exchange interaction, however, couples the qubit states to charge noise, which reduces the fidelity...

  • Open Access
    Authors: 
    Sean B. S. Miller; Andreas Ekström; Christian Forssén;
    Publisher: IOP Publishing
    Project: EC | PrecisionNuclei (758027)

    In this paper we analyse the efficiency, precision, and accuracy of computing elastic nucleon-nucleon (NN) scattering amplitudes with the wave-packet continuum discretisation method (WPCD). This method provides approximate scattering solutions at multiple scattering ene...

  • Open Access English
    Authors: 
    Hua Yang; B. Emek Abali; Wolfgang H. Müller; Salma Barboura; Jia Li;
    Countries: Sweden, Germany

    Strain gradient theory is an accurate model for capturing the size effect and localization phenomena. However, the challenge in identification of corresponding constitutive parameters limits the practical application of the theory. We present and utilize asymptotic homo...

  • Open Access English
    Authors: 
    Ahdida, C.; Akmete, A.; Albanese, R.; Alt, J.; Alexandrov, A.; Anokhina, A.; Aoki, S.; Arduini, G.; Atkin, E.; Azorskiy, N.; +190 more
    Countries: Denmark, Sweden, Italy, Switzerland
    Project: EC | NuBSM (694896)

    In July 2018 an optimization run for the proposed charm cross section measurement for SHiP was performed at the CERN SPS. A heavy, moving target instrumented with nuclear emulsion films followed by a silicon pixel tracker was installed in front of the Goliath magnet at ...

  • Publication . Preprint . Article . 2021
    Open Access English
    Authors: 
    Jolin, Shan W.; Andersson, Gustav; Hern��ndez, J. C. Rivera; Strandberg, Ingrid; Quijandr��a, Fernando; Aumentado, Joe; Borgani, Riccardo; Thol��n, Mats O.; Haviland, David B.;
    Publisher: KTH, Nanostrukturfysik
    Country: Sweden

    Significant progress has been made with multipartite entanglement of discrete qubits, but continuous variable systems may provide a more scalable path toward entanglement of large ensembles. We demonstrate multipartite entanglement in a microwave frequency comb generate...

  • Publication . Article . Preprint . Other literature type . Research . 2021
    Open Access English
    Authors: 
    Aaij, R.; Abdelmotteleb, A. S. W.; Beteta, C. Abellan; Abudinen, F.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Afsharnia, H.; Agapopoulou, C.; Aidala, C. A.; +192 more
    Countries: Italy, Germany, Italy, Russian Federation, France, Switzerland, Netherlands, United Kingdom, Germany, United Kingdom ...

    A combination of measurements sensitive to the CP violation angle �� of the Cabibbo-Kobayashi-Maskawa unitarity triangle and to the charm mixing parameters that describe oscillations between D$^{0}$ and $ \overline{D} ^{0}$ mesons is performed. Results from the charm an...