Exploració per tema "Quantum theory"
Ara es mostren els items 32-51 de 103
-
Klein's paradox and the relativistic d-shell interaction in R3
(Mathematical Sciences Publishers, 2017-12-20)
Article
Accés obertUnder certain hypotheses of smallness on the regular potential V, we prove that the Dirac operator in Unexpected text node: 'R', coupled with a suitable rescaling of V, converges in the strong resolvent sense to the ... -
Large-scale cuantum computing simulation using tensor networks
(Universitat Politècnica de Catalunya, 2021-06-29)
Projecte Final de Màster Oficial
Accés obertResource usage of traditional quantum computing simulation techniques scale exponentially fast either with the number of qubits or the depth of the circuit. Simulations of medium-sized circuits are then intractable but ... -
Llenguatges de Programació Quàntica
(Universitat Politècnica de Catalunya, 2009-06)
Projecte/Treball Final de Carrera
Accés obertAprofundir en els coneixements de computació quàntica, tant des del vessant de la física com des del vessant de la teoria de la computació, que em situïn en un punt de "pre-recerca". Tenir un mapa de les diferents ... -
Local discrimination of rotationally invariant states
(Universitat Politècnica de Catalunya / Universitat Autònoma de Barcelona, 2010)
Projecte Final de Màster Oficial
Accés obertWe provide lower bounds for the minimum error discrimination probability of multipartite rotationally invariant states using separable measurements. The separability of the measurement operators has been investigated, ... -
Loophole-free Bell inequality violation using electron spins separated by 1.3 kilometres
(Nature Publishing Group, 2015-10-21)
Article
Accés restringit per política de l'editorialMore than 50 years ago1, John Bell proved that no theory of nature that obeys locality and realism2 can reproduce all the predictions of quantum theory: in any local-realist theory, the correlations between outcomes of ... -
Macroscopic Quantum State Analyzed Particle by Particle
(ACS Publications, 2015-03-27)
Article
Accés obertMacroscopic quantum phenomena, e.g., superconductivity and squeezing, are believed to result from entanglement of macroscopic numbers of particles. We report the first direct study of this kind of entanglement: we use ... -
Many-body bound states and induced interactions of charged impurities in a bosonic bath
(2023-12-01)
Article
Accés obertInduced interactions and bound states of charge carriers immersed in a quantum medium are crucial for the investigation of quantum transport. Ultracold atom-ion systems can provide a convenient platform for studying this ... -
Matter Bounce Scenario in F(T) gravity
(2016)
Article
Accés obertIt is shown that teleparallel F(T) theories of gravity combined with holonomy corrected Loop Quantum Cosmology (LQC) support a Matter Bounce Scenario (MBS) which is a potential alternative to the inflationary paradigm. The ... -
Maximally Nonlocal Theories Cannot Be Maximally Random
(APS, 2015-04-22)
Article
Accés obertCorrelations that violate a Bell inequality are said to be nonlocal; i.e., they do not admit a local and deterministic explanation. Great effort has been devoted to study how the amount of nonlocality (as measured by a ... -
Methods for solving 1D Stefan problems with application to contact melting
(Universitat Politècnica de Catalunya, 2011-05)
Projecte Final de Màster Oficial
Accés obertContact melting is the process during which a phase change material is placed in contact with a substrate that is at a temperature above the phase change temperature. This leads to melting of the phase change material and ... -
Modeling interference with particle detectors in Quantum Field Theory
(Universitat Politècnica de Catalunya, 2023-05-26)
Treball Final de Grau
Accés restringit per acord de confidencialitat
Realitzat a/amb: University of WaterlooL'òptica quàntica és la branca de la física que estudia la interacció entre la llum i la matèria. Aquesta teoria ha estat utilitzada per donar fonament teòric a molts experiments, però és comú fer servir moltes aproximacions. ... -
Monte Carlo simulation of recent experiments with ultracold dipolar atoms in one dimension
(Universitat Politècnica de Catalunya, 2022-01-27)
Treball Final de Grau
Accés obert -
Monte Carlo simulation of recent experiments with ultracold dipolar atoms in one dimension
(Universitat Politècnica de Catalunya, 2021-06-28)
Treball Final de Grau
Accés obertIn a recent experiment (https://arxiv.org/abs/2002.10475) with ultracold dysprosium atoms, it was possible to realize a dipolar gas in one-dimensional geometry at low temperature. The goal of the project is to provide ... -
Observation of the topological Anderson insulator in disordered atomic wires
(2018-11-23)
Article
Accés obertTopology and disorder have a rich combined influence on quantum transport. In order to probe their interplay, we synthesized one-dimensional chiral symmetric wires with controllable disorder via spectroscopic Hamiltonian ... -
Observing subradiant dynamics in atomic arrays
(Universitat Politècnica de Catalunya, 2020-09-08)
Projecte Final de Màster Oficial
Accés obertIn recent years, there has been an increasing interest in subradiance in ordered atomic arrays, both for its rich phenomenology and its potential importance in realizing robust quantum optical applications. However, the ... -
One qubit as a universal approximant
(American Physical Society, 2021-07)
Article
Accés obertA single-qubit circuit can approximate any bounded complex function stored in the degrees of freedom defining its quantum gates. The single-qubit approximant presented in this work is operated through a series of gates ... -
One-shot capacity bounds on the simultaneous transmission of classical and quantum information
(2019-10-07)
Article
Accés obertWe study the communication capabilities of a quan- tum channel under the most general channel model known as the one-shot model. Unlike classical channels that can only be used to transmit classical information (bits), a ... -
Partículas huérfanas
(1997-11)
Article
Accés obert -
Passive decoy-state quantum key distribution with coherent light
(2015-06-12)
Article
Accés obertSignal 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 ... -
Past, present and challenges in Yang-Mills theory
(Universitat Politècnica de Catalunya, 2012-07)
Projecte Final de Màster Oficial
Accés obertAquest treball tracta sobre les teories gauge de la física teòrica, la seva evolució des de el primer treball de Weyl (1918) fins als nostres dies tenint en compte el treball fonamental elaborat el 1954 per Yang i Mills que ...