Now showing items 1-13 of 13

    • Comparison of beam wander correction by quadrant and ideal detectors for aerial quantum communication links 

      Gómez-García, Jorge (Universitat Politècnica de Catalunya, 2015-10-15)
      Master thesis
      Open Access
      We report an analysis of beam wander correction by both a quadrant and an ideal detector in a close loop configuration. The analysis is performed with the aim of finding the optimum detector for beam tracking of free space ...
    • Exciton engineering with 2D heterostructures. 

      Moreno Abajo, Álvaro (Universitat Politècnica de Catalunya, 2020-09-08)
      Master thesis
      Open Access
      Quantum emitters have an important role in many quantum technologies as quantum sensing and metrology, quantum computation or quantum information. They must be isolated from their environment, but paradoxically some external ...
    • Inequivalence of entanglement, steering, and Bell nonlocality for general measurements 

      Quintino, Marco Tulio; Vértesi, Tamas; Cavalcanti, Daniel; Augusiak, Remigiusz; Demianowicz, Maciej; Acín, Antonio; Brunner, Nicolas (APS, 2015-09-08)
      Article
      Open Access
      Einstein-Podolsky-Rosen steering is a form of inseparability in quantum theory commonly acknowledged to be intermediate between entanglement and Bell nonlocality. However, this statement has so far only been proven for a ...
    • Modelling short-range quantum teleportation for scalable multi-core quantum computing architectures 

      Rodrigo Muñoz, Santiago; Abadal Cavallé, Sergi; García Almudever, Carmen; Alarcón Cot, Eduardo José (Association for Computing Machinery (ACM), 2021)
      Conference report
      Open Access
      Multi-core quantum computing has been identified as a solution to the scalability problem of quantum computing. However, interconnecting quantum chips is not trivial, as quantum communications have their share of quantum ...
    • Passive Decoy-State Quantum Key Distribution with Coherent Light 

      Curty, Marcos; Jofre Cruanyes, Marc; Pruneri, Valerio; Mitchell, Morgan W. (MDPI, 2015-06-12)
      Article
      Open Access
      Signal state preparation in quantum key distribution schemes can be realized using either an active or a passive source. Passive sources might be valuable in some scenarios; for instance, in those experimental setups ...
    • Passive decoy-state quantum key distribution with coherent light 

      Curty, M.; Jofre Cruanyes, Marc; Pruneri, Valerio; Mitchell, Morgan W. (2015-06-12)
      Article
      Open Access
      Signal state preparation in quantum key distribution schemes can be realized using either an active or a passive source. Passive sources might be valuable in some scenarios; for instance, in those experimental setups ...
    • Quantum annealing: near future applications 

      Escolano Rubio, Oscar (Universitat Politècnica de Catalunya, 2020-11)
      Bachelor thesis
      Open Access
      Introduction to quantum computing with a description of the current state-of-the-art. The practical part consists in a qubit simulation with Rabi cycles under continuous measurements.
    • Quantum nonlocality certification from Bell inequalities in three-level many-body systems 

      MÜller Rigat, Guillem-Jacob (Universitat Politècnica de Catalunya, 2020-09-09)
      Master thesis
      Open Access
      In this work, we aim at studying the applicability of the recently discovered multipartite permutationally invariant three-outcome Bell inequality involving at most second order correlation functions (3-outcome PIBI) ...
    • Quantum Resistant Authenticated Key Exchange for OPC UA using Hybrid X.509 Certificates 

      Scheible, Patrik (Universitat Politècnica de Catalunya, 2020-04)
      Master thesis
      24 months embargo
      While the current progress in quantum computing opens new opportunities in a wide range of scientific fields, it poses a serious threat to today?s asymmetric cryptography. New quantum resistant primitives are already ...
    • Single-serving quantum broadcast channel with common, individualized, and confidential messages 

      Salek Shishavan, Farzin; Hsieh, Min-Hsiu; Rodríguez Fonollosa, Javier (2020-12)
      Article
      Open Access
      The two-receiver broadcast channel with primary and third party receivers is studied. The sender wishes to reliably communicate a common (or public) message to both receivers as well as individualized and confidential ...
    • Space QUEST mission proposal: experimentally testing decoherence due to gravity 

      Joshi, Siddarth Koduru; Pienaar, Jacques; Ralph, Timothy C.; Pérez Torres, Juan (2018-06-12)
      Article
      Open Access
      Models of quantum systems on curved space-times lack sufficient experimental verification. Some speculative theories suggest that quantum correlations, such as entanglement, may exhibit different behavior to purely classical ...
    • Will quantum computers scale without inter-chip comms? A structured design exploration to the monolithic vs distributed architectures quest 

      Rodrigo Muñoz, Santiago; Abadal Cavallé, Sergi; Alarcón Cot, Eduardo José; García Almudéver, Carmen (Institute of Electrical and Electronics Engineers (IEEE), 2020)
      Conference report
      Open Access
      Being a very promising technology, with impressive advances in the recent years, it is still unclear how quantum computing will scale to satisfy the requirements of its most powerful applications. Although continued progress ...
    • Work distributions on quantum fields 

      Ortega González, Álvaro (Universitat Politècnica de Catalunya, 2019-05-31)
      Bachelor thesis
      Open Access
      Covenantee:   Institute for Quantum Computing
      We study the work cost of processes in quantum fields without the need of projective measurements, which are always ill-defined in quantum field theory. Inspired by interferometry schemes, we propose a work distribution ...