Adecuación periodontal pre-protética

Este trabajo tiene como objetivos restablecer la salud oral integral y las funciones bucales, de un paciente mediante tratamiento periodontal y protésico rehabilitador; analizar la predictibilidad de las expectativas del paciente frente a una nueva propuesta de tratamiento dental; evaluar las posibles razones de la carencia de éxito de las intervenciones profesionales previas; explicar y registrar los avances del paciente respecto con la comprensión de su participación activa en el logro y mantenimiento de la salud dental; planificar y ejecutar un tratamiento acorde a las necesidades del paciente y de la rehabilitación de la salud y funciones bucales mediante las terapias requeridas y un programa de mantenimiento personalizado; evaluar los resultados de la misma.Fil: Faoro, Laura. Universidad Nacional de Cuyo. Facultad de Odontología

Quantum two level systems and Kondo-like traps as possible sources of decoherence in superconducting qubits

We discuss the origin of decoherence in Josephson junction qubits. We find that two level systems in the surrounding insulator cannot be the dominant source of noise in small qubits. We argue that electron traps in the Josephson barrier with large Coulomb repulsion would give noise that agrees both in magnitude and in temperature dependence with experimental data.Comment: 4 pages, no figure

Analysis of high quality superconducting resonators: consequences for TLS properties in amorphous oxides

$1/f$ noise caused by microscopic Two-Level Systems (TLS) is known to be very detrimental to the performance of superconducting quantum devices but the nature of these TLS is still poorly understood. Recent experiments with superconducting resonators indicates that interaction between TLS in the oxide at the film-substrate interface is not negligible. Here we present data on the loss and $1/f$ frequency noise from two different Nb resonators with and without Pt capping and discuss what conclusions can be drawn regarding the properties of TLS in amorphous oxides. We also estimate the concentration and dipole moment of the TLS.Comment: 8 pages, 5 figure

Quantum Logical States and Operators for Josephson-like Systems

We give a formal algebraic description of Josephson-type quantum dynamical systems, i.e., Hamiltonian systems with a cos theta-like potential term. The two-boson Heisenberg algebra plays for such systems the role that the h(1) algebra does for the harmonic oscillator. A single Josephson junction is selected as a representative of Josephson systems. We construct both logical states (codewords) and logical (gate) operators in the superconductive regime. The codewords are the even and odd coherent states of the two-boson algebra: they are shift-resistant and robust, due to squeezing. The logical operators acting on the qubit codewords are expressed in terms of operators in the enveloping of the two-boson algebra. Such a scheme appears to be relevant for quantum information applications.Comment: 12 pages in RevTex. In press, Journal of Physics A/Letter

Models of environment and T_1 relaxation in Josephson Charge Qubits

A theoretical interpretation of the recent experiments of Astafiev et. al. on the T_1-relaxation rate in Josephson Charge Qubits is proposed. The experimentally observed reproducible nonmonotonic dependence of T_1 on the splitting E_J of the qubit levels suggests further specification of the previously proposed models of the background charge noise. From our point of view the most promising is the ``Andreev fluctuator'' model of the noise. In this model the fluctuator is a Cooper pair that tunnels from a superconductor and occupies a pair of localized electronic states. Within this model one can naturally explain both the average linear T_1(E_J) dependence and the irregular fluctuations. The role of fluctuators in the formation of strong resonant peaks in this dependence is also discussed.Comment: 4 pages, 3 figure

Microscopic model of quantum butterfly effect: out-of-time-order correlators and traveling combustion waves

We extend the Keldysh technique to enable the computation of out-of-time order correlators. We show that the behavior of these correlators is described by equations that display initially an exponential instability which is followed by a linear propagation of the decoherence between two initially identically copies of the quantum many body systems with interactions. At large times the decoherence propagation (quantum butterfly effect) is described by a diffusion equation with non-linear dissipation known in the theory of combustion waves. The solution of this equation is a propagating non-linear wave moving with constant velocity despite the diffusive character of the underlying dynamics. Our general conclusions are illustrated by the detailed computations for the specific models describing the electrons interacting with bosonic degrees of freedom (phonons, two-level-systems etc.) or with each other

Ultranarrow CPO resonance in a \Lambda-type atomic system

It is well known that ultranarrow electromagnetically induced transparency (EIT) resonances can be observed in atomic gases at room temperature. We report here the experimental observation of another type of ultranarrow resonances, as narrow as the EIT ones, in a \Lambda-system selected by light polarization in metastable 4He at room temperature. It is shown to be due to coherent population oscillations in an open two-level system (TLS). For perpendicular linearly polarized coupling and probe beams, this system can be considered as two coupled open TLSs, in which the ground state populations exhibit anti-phase oscillations. We also predict theoretically that in case of two parallel polarizations, the system would behave like a closed TLS, and the narrow resonance associated with these oscillations would disappear.Comment: 5 pages, 5 figure

O controle penal no crime de lavagem de capitais

A presente pesquisa tem como escopo analisar de que maneira se estrutura o sistema de controle penal de lavagem de capitais, suas formas de atuação e principais medidas expedidas. Com isso em vista, verificou-se a existência de uma tendência – no âmbito nacional e internacional – de se intensificar as orientações preventivas e repressivas do delito de lavagem de capitais. Tendo em conta esta constatação, realizou-se inspeção nos acórdãos publicados pelo sistema de pesquisa do Tribunal Regional Federal da 4ª Região que versassem, mesmo que indiretamente, sobre lavagem de capitais, a fim de constatar a congruência – ou não – da expressão jurisprudencial do Tribunal aludido, com a intensificação punitiva normativa verificada. O exame das decisões que formaram o banco de dados da pesquisa permitiu concluir ainda ser inexpressiva a incidência do direito penal no âmbito complexo das condutas eventualmente configuradoras do delito de lavagem de capitais. Desta forma, permanece o questionamento relativo ao acerto da utilização do direito penal como medida efetiva e não meramente simbólica no trato desta questão.The present research has as its aim the analysis of how is structured the system of criminal control of money laundering, its ways of performance as well as the main issued measures. Thus, it was verified the existence of a tendency – both in the national and the international fields – to intensify the preventive and repressive measures related to the delict of money laundering. Therefore, considering this finding, it was seeked the accomplish of an inspection on the publicized judgements by the research system of the Federal Regional Court of the 4th Region which were related, even indirectly, about money laundering in order to verify the congruence – or not – of the jurisprudence expression with the normative punitive intensification detected. The examination which took place on the mentioned decisions that formed the database of research allowed to achieve the conclusion that it is still expressionless the incidence of criminal law in the ambit of the complexity of the conducts occasionally outlined as delict of money laundering. In this way, it remains the indagation concerning to the correctness of the use of criminal law in dealing with these issues as effective actions and not merely symbolic

Quantum entanglement and classical communication through a depolarising channel

We analyse the role of entanglement for transmission of classical information through a memoryless depolarising channel. Using the isotropic character of this channel we prove analytically that the mutual information cannot be increased by encoding classical bits into entangled states of two qubits.Comment: 6 pages, 2 figures; contribution to special issue of JMO on the physics of quantum information; 2nd version: slight modifications and improved presentatio