Ara es mostren els items 10-29 de 40

    • Entanglement and non local correlations: quantum resources for information processing 

      Prettico, Giuseppe (Universitat Politècnica de Catalunya, 2013-01-18)
      Tesi
      Accés obert
      Quantum Information Theory (QIT) studies how information can be processed and transmitted when encoded on quantum states. Practically, it can be understood as the effort to generalize Classical Information Theory to the ...
    • Entanglement and non-locality of pure quantum states. 

      Sainz, Ana Belén (Universitat Politècnica de Catalunya, 2010-07-19)
      Projecte Final de Màster Oficial
      Accés obert
      We study the process of majorisation and interconversion of bipartite states, and apply the formalism for analysing the local and non-local content of pure bipartite entangled states. We proved that the states which are ...
    • Entanglement in the graph-state formalism 

      Dhara, Chrirag (Universitat Politècnica de Catalunya, 2009-09-09)
      Projecte Final de Màster Oficial
      Accés obert
      We investigate the decoherence dynamics of a class of multi-particle entangled states - graph states - when subjected to individual noise processes. Recent analytical results for Pauli noise channels are summarized here. ...
    • Experimental tools for quantum networking operations with single photons and sinlge ions 

      Huwer, Jan Henning (Universitat Politècnica de Catalunya, 2014-01-29)
      Tesi
      Accés obert
      One promising approach for future quantum networks is the combination of strings of trapped ions as quantum-information processors with entangled photon pairs produced by spontaneous parametric down conversion (SPDC) to ...
    • Exploring nonlocal correlations in many-body systems 

      López Pastor, Víctor José (Universitat Politècnica de Catalunya, 2018-07-19)
      Projecte Final de Màster Oficial
      Accés obert
      We address the question of how to evaluate the Bell correlations depth, i.e. the number of parties sharing genuinely nonlocal correlations in a multipartite system. Previous work has shown that it is possible to construct ...
    • From quantum foundations to quantum information protocols and back 

      Torre Carazo, Gonzalo de la (Universitat Politècnica de Catalunya, 2015-09-23)
      Tesi
      Accés obert
      Physics has two main ambitions: to predict and to understand. Indeed, physics aims for the prediction of all natural phenomena. Prediction entails modeling the correlation between an action, the input, and what is subsequently ...
    • Hierarchical representations in machine learning and many-body quantum physics 

      Blázquez García, Raúl (Universitat Politècnica de Catalunya, 2017-10-27)
      Projecte Final de Màster Oficial
      Accés obert
      Over the past few years a number of proofs have emerged revealing the many connections between the methods used in quantum-many body physics and those in machine learning. In particular, much attention has been given to ...
    • 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 ...
    • Information-theoretical Secret-key agreement and Bound information 

      Kreissig, Martin (Universitat Politècnica de Catalunya, 2009-02-25)
      Projecte Final de Màster Oficial
      Accés obert
      One big problem of the communication between two parties is the secrecy. That means how much information a third party can obtain by intercepting the messages transmitted from one honest party to the other one. Therefore ...
    • Intrinsic randomness in non-local theories: quantification and amplification 

      Dhara, Chirag (Universitat Politècnica de Catalunya, 2013-06-12)
      Tesi
      Accés obert
      Quantum mechanics was developed as a response to the inadequacy of classical physics in explaining certain physical phenomena. While it has proved immensely successful, it also presents several features that severely ...
    • Investigating quantum many-body systems with tensor networks, machine learning and quantum computers 

      Kottmann, Korbinian Gebhard (Universitat Politècnica de Catalunya, 2022-10-14)
      Tesi
      Accés obert
      (English) We perform quantum simulation on classical and quantum computers and set up a machine learning framework in which we can map out phase diagrams of known and unknown quantum many-body systems in an unsupervised ...
    • Local temperature and correlations in quantum many-body systems 

      Hernández Santana, Senaida (Universitat Politècnica de Catalunya, 2019-04-12)
      Tesi
      Accés obert
      Quantum Mechanics was established as the theory of the microscopic world, which allowed to understand processes in atoms and molecules. Its emergence led to a new scientific paradigm that quickly spread to different research ...
    • Machine learning for quantum physics and quantum physics for machine learning 

      Huembeli, Patrick (Universitat Politècnica de Catalunya, 2021-03-25)
      Tesi
      Accés obert
      Research at the intersection of machine learning (ML) and quantum physics is a recent growing field due to the enormous expectations and the success of both fields. ML is arguably one of the most promising technologies ...
    • Mathematical and Technological Aspects of Quantum Information Processing 

      Tura i Brugués, Jordi (Universitat Politècnica de Catalunya, 2011-03)
      Projecte Final de Màster Oficial
      Accés obert
      Since its genesis, quantum mechanics has proved to be a very accurate model for predicting the behavior of the world below the nanoscale. However, crucial breakthroughs in technology were needed in order to be able to e ...
    • Network nonlocality with continuous variables 

      Guerra Copete, José Carlos (Universitat Politècnica de Catalunya, 2021-09-08)
      Projecte Final de Màster Oficial
      Accés obert
      Since the birth of quantum mechanics, quantum information theory has seen a rise due to the contradiction with classical models. Some new concepts have surged up from the application of quantum models to information theory, ...
    • Nonlocal resources for quantum information tasks 

      Curchod, Florian John (Universitat Politècnica de Catalunya, 2018-10-11)
      Tesi
      Accés obert
      This thesis focusses on the essential features of Quantum Theory that are systems in an entangled state and Bell nonlocal correlations. Here, we take the angle of a resource theory and are interested in understanding better ...
    • Nonlocality in multipartite correlation networks 

      Würflinger, Lars Erik (Universitat Politècnica de Catalunya, 2013-09-18)
      Tesi
      Accés obert
      Despite the success of quantum mechanics in predicting the outcomes of experiments in many branches of physics, the foundations of the theory have remained subject of research and dispute. At the basis of this struggle ...
    • Quantifying randomness from Bell nonlocality 

      Bourdoncle, Boris (Universitat Politècnica de Catalunya, 2019-02-13)
      Tesi
      Accés obert
      The twentieth century was marked by two scientific revolutions. On the one hand, quantum mechanics questioned our understanding of nature and physics. On the other hand, came the realisation that information could be treated ...
    • Quantum algorithms for state reconstruction 

      Pedrol Ripoll, Eric (Universitat Politècnica de Catalunya, 2013-09-09)
      Projecte Final de Màster Oficial
      Accés obert
      [ANGLÈS] We review quantum state reconstruction schemes. We also present a quantum state preparation method by means of single-qubit operations and controlled not (C-NOT) gates. We aim at finding new quantum circuit schemes ...
    • Quantum computing by interrogation 

      Supic, Ivan (Universitat Politècnica de Catalunya, 2014-09-09)
      Projecte Final de Màster Oficial
      Accés obert
      [ANGLÈS] Quantum information theory forms a bridge between the foundations of quantum mechanics and its promising practical potentials. The extensive theoretical research has been conducted during the last decades and the ...