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  • 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 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...

  • Open Access English
    Authors: 
    Aad, Georges; Abbott, Braden Keim; Abbott, Dale; Abed Abud, Adam; Abeling, Kira; Abhayasinghe, Deshan Kavishka; Abidi, Haider; AbouZeid, O.S.; Abouzeid, Hass; Abramowicz, Halina; +1,177 more
    Publisher: Springer
    Countries: Spain, Denmark, Germany, Sweden, Switzerland, Norway, Italy, Netherlands, France, Poland

    We thank CERN for the very successful operation of the LHC, as well as the support staff from our institutions without whom ATLAS could not be operated efficiently. We acknowledge the support of ANPCyT, Argentina; YerPhI, Armenia; ARC, Australia; BMWFW and FWF, Austria;...

  • Publication . Article . Preprint . 2021
    Open Access English
    Authors: 
    E. T. Mannila; P. Samuelsson; S. Simbierowicz; J. T. Peltonen; V. Vesterinen; L. Grönberg; J. Hassel; V. F. Maisi; J. P. Pekola;
    Country: Finland
    Project: AKA | Superconducting readout a... (321700), AKA | Finnish Centre of Excelle... (312057), AKA | Finnish Centre of Excelle... (312294), AKA | Finnish Centre of Excelle... (312059), EC | SQH (742559)

    Superconducting devices, based on the Cooper pairing of electrons, play an important role in existing and emergent technologies, ranging from radiation detectors to quantum computers. Their performance is limited by spurious quasiparticle excitations formed from broken ...

  • Open Access English
    Authors: 
    K. Kovalenko; X. Dai; K. Alfaro-Bittner; A. M. Raigorodskii; M. Perc; S. Boccaletti;

    We give evidence that a population of pure contrarians globally coupled D-dimensional Kuramoto oscillators reaches a collective synchronous state when the interplay between the units goes beyond the limit of pairwise interactions. Namely, we will show that the presence ...