Relative Phase Shifts for Metaplectic Isotopies Acting on Mixed Gaussian States

We address in this paper the notion of relative phase shift for mixed quantum systems. We study the Pancharatnam-Sjoeqvist phase shift for metaplectic isotopies acting on Gaussian mixed states. We complete and generalize previous results obtained by one of us while giving rigorous proofs. This gives us the opportunity to review and complement the theory of the Conley-Zehnder index which plays an essential role in the determination of phase shifts.Comment: Corrections and additions. Shorter version accepted for publication in Journal of Mathematical Physic

Capacitive Coupling of Two Transmission Line Resonators Mediated by the Phonon Number of a Nanoelectromechanical Oscillator

Detection of quantum features in mechanical systems at the nanoscale constitutes a challenging task, given the weak interaction with other elements and the available technics. Here we describe how the interaction between two monomodal transmission-line resonators (TLRs) mediated by vibrations of a nano-electromechanical oscillator can be described. This scheme is then employed for quantum non-demolition detection of the number of phonons in the nano-electromechanical oscillator through a direct current measurement in the output of one of the TLRs. For that to be possible an undepleted field inside one of the TLR works as a amplifier for the interaction between the mechanical resonator and the remaining TLR. We also show how how the non-classical nature of this system can be used for generation of tripartite entanglement and conditioned mechanical coherent superposition states, which may be further explored for detection processes.Comment: 6 pages, 5 figure

O MARKETING EDUCACIONAL NO ENSINO SUPERIOR: LEVANTAMENTO DOS TRABALHOS APRESENTADOS NOS COLÓQUIOS INTERNACIONAIS DE GESTÃO UNIVERSITÁRIA

O marketing vem sendo utilizado e aplicado em diversas instituições, com diferentes ênfases, sendo a educacional relativamente recente no Brasil, principalmente quando se trata da aplicação em instituições públicas. Objetivou-se identificar os trabalhos na área de marketing educacional apresentados no principal evento que discute a gestão universitária na América Latina. Para tanto, realizou-se um levantamento de trabalhos que utilizaram o marketing no Colóquio Internacional de Gestão Universitária nas Américas, verificando-se quais pesquisas estão sendo desenvolvidas, assim como em quais instituições. Verificou-se que dentre os 2118 artigos apresentados, nos treze Colóquios realizados, apenas 310 artigos apresentaram a palavra “marketing”, sendo que após a leitura dos mesmos, apenas 50 artigos apresentaram o marketing aplicado a Instituições de Ensino Superior. Destaca-se que destes, 18 apresentavam pesquisas diagnósticas e 16 voltados para gestão. Conclui-se que o marketing vem sendo utilizado em instituições de ensino superior, porém ainda de modo superficial e com necessidade de maior sistematização, utilizando-se dos fundamentos teóricos e procedimentais, ou seja, é um campo que ainda tem muito a ser explorado e potencializado

Determining stationary-state quantum properties directly from system-environment interactions

Considering stationary states of continuous-variable systems undergoing an open dynamics, we unveil the connection between properties and symmetries of the latter and the dynamical parameters. In particular, we explore the relation between the Lyapunov equation for dynamical systems and the steady-state solutions of a time-independent Lindblad master equation for bosonic modes. Exploiting bona-fide relations that characterize some genuine quantum properties (entanglement, classicality, and steerability), we obtain conditions on the dynamical parameters for which the system is driven to a steady-state possessing such properties. We also develop a method to capture the symmetries of a steady state based on symmetries of the Lyapunov equation. All the results and examples can be useful for steady-state engineering process.Comment: 12 pages, 2 figure