Enviaments recents

  • Quantum metrology with high-density atomic vapors and squeezed states of light 

    Lucivero, Vito Giovanni (Universitat Politècnica de Catalunya, 2016-10-14)
    Tesi
    Accés obert
    Nowadays there is a considerable progress in optical magnetometry and spin noise spectroscopy, which use magnetically-sensitive atomic ensembles and optical read-out, approaching the limits set by quantum mechanics. In ...
  • Towards the generation of isolated attosecond pulses in the water window 

    Cousin, Seth Lucien (Universitat Politècnica de Catalunya, 2016-09-12)
    Tesi
    Accés obert
    Attosecond science investigates the realm of processes that happen in fleetingly short passages of time. One attosecond to one second, is what one second is to the age of the universe! Advances in lasers and specifically ...
  • Photodetectors based on low-dimensional materials and hybrid systems 

    Kuffer, Dominik (Universitat Politècnica de Catalunya, 2016-06-13)
    Tesi
    Accés obert
    In the last decade, two-dimensional (2D) materials have attracted attention both in the nascent field of flexible nanotechnology as well as in more conventional semiconductor technol-ogies. Within the rapidly expanding ...
  • Impact of imperfections on correlation-based quantum information protocols 

    Passaro, Elsa (Universitat Politècnica de Catalunya, 2016-05-30)
    Tesi
    Accés obert
    Quantum information science is a rapidly evolving field both from the theoretical and the experimental viewpoint, motivated by the fact that protocols exploiting quantum resources can perform tasks that are unfeasible in ...
  • Generation of intense few-cycle phase-stable electric fields: from the mid-IR to soft X-rays 

    Silva, Francisco José Maia da (Universitat Politècnica de Catalunya, 2016-02-29)
    Tesi
    Accés obert
    Devising new tools that expand our capabilities to sense and manipulate the world enables much of the scientific and technological progress around us. For example, light is increasingly more important as a tool for humanity. ...
  • Sources of photonic entanglement for applications in space 

    Steinlechner, Fabian (Universitat Politècnica de Catalunya, 2015-12-14)
    Tesi
    Accés obert
    The nonlocal correlations of entangled systems are a feature inherent to quantum theory that is fundamentally at odds with our common-sense notions of realism and locality. Additionally, entanglement is an essential resource ...
  • Graphene optoelectronics from the visible to the mid-infrared 

    Badioli, Michela (Universitat Politècnica de Catalunya, 2015-12-04)
    Tesi
    Accés obert
    Since its discovery in 2004, graphene, a one-atom-thick layer of carbon atoms arranged in a hexagonal lattice, has attracted huge interest from the scientific community due to its extraordinary electronic, mechanical, and ...
  • Entanglement and state characterisation from two-photon interference 

    Beduini, Federica A. (Universitat Politècnica de Catalunya, 2015-11-03)
    Tesi
    Accés obert
    This thesis analyses the effects of two-photon interference in a polarisation squeezed state under two different points of view: on one hand, it presents a new method to obtain the temporal wavefunction of a state of two ...
  • Quantum control of single spin excitations in cold atomic quantum memories 

    Albrecht, Boris (Universitat Politècnica de Catalunya, 2015-12-01)
    Tesi
    Accés obert
    Optical quantum memories are important devices in quantum information science. In particular, they are building blocks of quantum repeater architectures that have been proposed to increase the range of quantum communication ...
  • High-power, fiber-laser-pumped frequency conversion sources for the ultraviolet 

    Sánchez Bautista, Enrique (Universitat Politècnica de Catalunya, 2015-11-26)
    Tesi
    Accés obert
    High-power, stable, high-repetition-rate, picosecond ultraviolet (UV) sources are of crucial importance for a variety of applications, such as atmospheric sensing, spectroscopy or optical data storage. Further, precise ...

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