Quantum multipartite entangled states, classical and quantum error correction 

    Raissi, Zahra (Fecha de defensa: 2020-10-08)

    Studying entanglement is essential for our understanding of such diverse areas as high-energy physics, condensed matter physics, and quantum optics. Moreover, entanglement allows us to surpass classical physics and ...

    Quantum nonlinear optics at the single-photon level with cold Rydberg atoms 

    Padrón Brito, María Auxiliadora (Fecha de defensa: 2021-04-08)

    Photons are good candidates for carrying quantum information because they are very stable particles: they interact weakly with the medium and barely with each other. However, this has drawbacks when you want to process ...

    Quantum Optics at its best: from quantum interferometry to quantum metrology 

    Almeida, Jessica Oliveira de (Fecha de defensa: 2022-07-28)

    Quantum optics experiments are currently the most advanced techniques to under- stand, verify and simulate quantum phenomena. However, to access all the perfor- mance available in quantum states of light, one needs to ...

    Quantum random number generators for industrial applications 

    Abellán Sánchez, Carlos (Fecha de defensa: 2018-06-19)

    Randomness is one of the most intriguing, inspiring and debated topics in the history of the world. It appears every time we wonder about our existence, about the way we are, e.g. Do we have free will? Is evolution a result ...

    Quantum simulations with ultracold atoms: beyond standard optical lattices 

    Hauke, Philipp Hans-Jürgen (Fecha de defensa: 2013-04-05)

    Many outstanding problems in quantum physics, such as high-Tc superconductivity or quark confinement, are still - after decades of research - awaiting commonly accepted explanations. One reason is that such systems are ...

    Quantum-based spectroscopy and efficient energy transport with biomolecules 

    León Montiel, Roberto de Jesús (Fecha de defensa: 2014-09-30)

    For many years, the fields of quantum optics and biology have rarely shared a common path. In quantum optics, most of the concepts and techniques developed over the years stand for systems where only a few degrees of freedom ...

    Quantum-enhanced imaging with SPAD array cameras 

    Camphausen, Robin (Fecha de defensa: 2023-04-12)

    (English) Entangled photon pairs can enhance optical imaging capabilities. Phase imaging allows detecting fine detail of transparent samples without potentially invasive fluorescent labelling, and here entanglement enables ...

    Quasi-perfect codes for the classical-quantum channel 

    Blasco Coll, Andreu (Fecha de defensa: 2023-09-27)

    (English) Quantum computers use the laws of quantum mechanics to do complex operations that classical computers can't solve. Quantum computers and other physical quantum systems require quantum information to be completely ...

    Query expansion by relying on the structure of knowledge bases 

    Guisado Gámez, Joan (Fecha de defensa: 2017-09-28)

    Query expansion techniques aim at improving the results achieved by a user's query by means of introducing new expansion terms, called expansion features. Expansion features introduce new concepts that are semantically ...

    Quick assessment through analytical solutions of induced seismicity in geo-energy applications 

    Wu, Haiqing (Fecha de defensa: 2023-07-28)

    (English) Understanding the triggering mechanisms of induced seismicity remains one of the most critical challenges in geo-energy applications. This Thesis aims at assessing (1) fault stability and induced seismicity ...

    Radar de subsuelo.Evaluación para aplicaciones en arqueología y en patrimonio histórico-artístico 

    Pérez Gracia, María de la Vega (Fecha de defensa: 2001-10-26)

    .<br/>El georradar es una herramienta cada vez más utilizada en diferentes ámbitos geológicos, medioambientales y de Ingeniería Civil, así como en estudios de caracterización de yacimientos arqueológicos y de diagnóstico ...

    Radiated transient interferences in digital communication systems 

    Pous Solà, Marc (Fecha de defensa: 2015-04-24)

    In the Electromagnetic Compatibility research area, an unsolved interference problem is the measurement and evaluation of the distortion produced by radiated transient disturbances on digital communication systems. This ...

    Radiation pattern reconfigurable microfabricated planar millimeter-wave antennas 

    Balcells Ventura, Jordi (Fecha de defensa: 2011-05-20)

    Els serveis de telecomunicacions i sistemes radar estan migrant a freqüències mil•limètriques (MMW), on es disposa d 'una major amplada de banda i conseqüentment d'una major velocitat de transmissió de dades. Aquesta ...

    Radiation Transport Modelling in a Tokomak Plasma: Application to Performance Prediciton and Design of Future Machines 

    Albajar Viñas, Ferran (Fecha de defensa: 2001-06-14)

    The understanding and modelling of heat and radiation transport in tokamak plasmas is essential in order to progress in the development of thermonuclear fusion towards a practical energy source which meets all the future ...

    Radio access network optimization with proactive resource management for 5G and beyond 

    Guerra Gómez, Rolando (Fecha de defensa: 2023-05-19)

    (English) The Fifth-Generation (5G) of cellular networks significantly increases the performance and flexibility of the offered services to users and service providers. The strict network requirement of 5G use cases has ...

    Radio and computing resource management in SDR clouds 

    Gómez, Ismael (Fecha de defensa: 2013-12-19)

    The aim of this thesis is defining and developing the concept of an efficient management of radio and computing resources in an SDR cloud. The SDR cloud breaks with today's cellular architecture. A set of distributed ...

    Radio frequency interference detection and mitigation techniques for navigation and Earth observation 

    Querol Borràs, Jorge (Fecha de defensa: 2018-11-09)

    Radio-Frequency Interference (RFI) signals are undesired signals that degrade or disrupt the performance of a wireless receiver. RFI signals can be troublesome for any receiver, but they are especially threatening for ...

    Radio frequency interference in microwave radiometry: statistical analysis and study of techniques for detection and mitigation 

    Tarongí Bauzá, José Miguel (Fecha de defensa: 2013-03-06)

    Microwave radiometry field has been increasing its performance with higher accuracy measurements, leading to a more presence in the remote sensing field. Several space-borne, air-borne and ground-based radiometers have ...

    Radio resource management for V2X in cellular systems 

    Albonda, Haider Daami R. (Fecha de defensa: 2020-07-21)

    The thesis focuses on the provision of cellular vehicle-to-everything (V2X) communications, which have attracted great interest for 5G due to the potential of improving traffic safety and enabling new services related to ...

    Radio resource management strategies for interference mitigation in 4G heterogeneous wireless networks 

    Koutlia, Aikaterini (Fecha de defensa: 2016-05-18)

    The new era of mobile communications is dictated by the user demand for robust and high speed connections, data hungry applications and seamless connectivity. Operators and researchers all over the world are challenged to ...