Browsing by Author "Orszag Posa, Miguel"
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- ItemA comparative study of the optical and circuit representation of the unambiguous quantum state discriminator(2010) Hernández Gaete, Maritza Lisette; Orszag Posa, Miguel
- ItemA Single-Ion Stochastic Quantum Processor(2006) Blackburn, P.; Orszag Posa, Miguel
- ItemCavity Qed: a Quantum Trajectory Point of View(2003) Spehner D; Orszag Posa, Miguel
- ItemCoherence and entanglement in a two-qubit system(2010) Orszag Posa, Miguel; Hernández Gaete, Maritza Lisette
- ItemCoherently controlled emission from two atoms dressed via a standing wave laser field(2011) Enaki, N.; Orszag Posa, Miguel
- ItemComment on "Instability and Entanglement of the Ground State of the Dicke Model" - Reply(2006) Buzek, V.; Orszag Posa, Miguel
- ItemContinuous Teleportation of the Photon Statistics of Squeezed States(2005) Orszag Posa, Miguel
- ItemControl of interference and diffraction of a three-level atom in a double-slit scheme with cavity fields(2020) Miranda Rojas, Mario Ernesto Brayan; Orszag Posa, Miguel
- ItemControl of wave-particle duality via atom-field interaction in double-slit schemes(2022) Miranda Rojas, Mario Ernesto Brayan; Orszag Posa, Miguel; Pontificia Universidad Católica de Chile. Instituto de FísicaThe dual nature of light and matter represents an important challenge for science. Since the origins of quantum mechanics, several theoretical and experimental works have studied the wave and corpuscular properties of photons, atoms, electrons, etc. The main model that has been considered in the development of them has been the Young's double-slit scheme, by means of which the wave nature of light was demonstrated. However, it also can be used to obtain the particle-like properties of the systems. In case of considering identical slits, this model allows to obtain total fringe visibility on a screen located at a certain distance from the double-slit, and thus, null knowledge about the path followed by the object that crosses the scheme. Therefore, the system shows a wave behavior. In order to obtain information about the path taken by the objects (photons, atoms, electrons, etc), several authors have studied the coupling of external systems to double-slit schemes, which allows to know the path followed by the particle. As a consequence, the implementation of any type of path-detector results in the loss of fringe visibility, according to the principle of complementarity postulated by Bohr. In this research, we have considered the use of double-slit schemes and atom-field interactions to control the balance between fringe visibility and which-path information. We consider field cavities which act as path-detectors and they are represented by different quantum states. Instead of photons, our schemes are crossed by atoms, whose internal levels are correlated to the paths of the schemes. Therefore, based on the peparation of both, field and atom, we can study the balance between distinguishability, visibility and the concurrence present in the system. Our results show that the wave-particle duality can be controlled by atomic and field parameters, depending on the behavior that the experimenter wishes to observe, wave-like or particle-like. Additionally, we present a model in which a classical field can control the quantum atom-field interaction. Therefore, the amplitude of the classical field can also be considered as a controlling parameter of the wave-particle duality. Finally, based on our results, we propose a theoretical model to be implemented in quantum eraser and delayed choice experiments, which nowadays arouses great interest among researchers. Our results suggest that the wave-particle duality can be controlled even at times after the atom is registered on a screen, which allows us to choose the behavior of the system, wave-like or particle-like, at any moment.
- ItemCooperative effects in a one-photon micromaser with atomic polarization(1997) Ladrón De Guevara, L.; Orszag Posa, Miguel; Ramírez Leiva, Ricardo
- ItemCooperative emission from two atoms localized in a standing wave field(2012) Ciobanu, N.; Orszag Posa, Miguel
- ItemCreation of entanglement of two atoms coupled to two distant cavities with losses(2011) Montenegro Tobar, Víctor Alejandro; Orszag Posa, Miguel
- ItemCurrent and entanglement in a three-site Bose-Hubbard ring(2012) Morales Molina, Luis Yansi; Reyes Swett, Sebastián Andrés; Orszag Posa, Miguel
- ItemDeath and revival of the quantum discord and the measurement-induced disturbance(2012) Gallego Mingo, María de los Angeles; Orszag Posa, Miguel
- ItemDecoherence and disentanglement for two qubits in a common squeezed reservoir(2008) Hernández Gaete, Maritza Lisette; Orszag Posa, Miguel
- ItemDecoherence-free subspace and entanglement by interaction with a common squeezed bath(2007) Mundarain, D.; Orszag Posa, Miguel
- ItemDetermination of the maximum global quantum discord via measurements of excitations in a cavity QED network(2014) Coto Cabrera, Raúl; Orszag Posa, Miguel
- ItemDinámica fuera del equilibrio de polaritones en cavidades QED(2021) Tancara Álvarez, Diego Andrés; Orszag Posa, Miguel; Pontificia Universidad Católica de Chile. Facultad de FísicaLos sistemas cuánticos basados en interacción de luz con materia en el régimen de acoplamiento fuerte sirven como plataformas físicas para estudiar dinámicas coherentes e incoherentes de estados cuánticos. Esto permite un amplio rango de parámetros de control que son ajustables experimentalmente y permiten explorar simulaciones cuánticas de sistemas físicos de muchos cuerpos, propagación de correlaciones cuánticas, y procesamiento de información cuántica. En esta tesis se estudia, mediante simulaciones numéricas, la dinámica de estados cuánticos de naturaleza híbrida entre átomo y fotón que describen cuasipartículas conocidas como polaritones. Estos se estudian en una y dos cavidades QED fuera del equilibrio. Primero, exploramos cuatro escenarios en donde establecemos condiciones para la transición entre ramas de polaritones, incluyendo mecanismos puramente coherentes en sistemas cerrados y mecanismos incoherentes correspondientes a procesos de decaimiento de la cavidad. Para los mecanismos coherentes obtenemos una condición para el cambio en el tiempo del detuning observando una oscilación de Rabi entre las ramas de polaritones de un mismo nivel. Luego aplicamos lo obtenido para estudiar curvas de transición de estados tipo Aislante-Mott y Superfluido en distintos tipos de dinámicas. Para los mecanismos incoherentes observamos una asimetría dependiente del detuning en las ramas de polaritones durante el proceso de relajación, lo que permite un cambio de rama en el proceso. Finalmente incluimos un bombeo externo para controlar oscilaciones de Rabi entre las ramas de polaritones a un mismo nivel.
- ItemDriven particle in an infinite square well: Representation and breakdown of the invariant tori in a multiple-resonance case(1995) Fuka, M.; Orszag Posa, Miguel; Ramírez Leiva, Ricardo
- ItemDynamical features of the quantum correlations in atom-cavity-fibre network(2014) Eremeev, Vitalie; Ciobanu, Nellu; Coto Cabrera, Raúl; Orszag Posa, Miguel