20 research outputs found

    Tunnel spectroscopy in ac-driven quantum dot nanoresonators

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    Electronic transport in a triple quantum dot shuttle device in the presence of an ac field is analyzed within a fully quantum mechanical framework. A generalized density matrix formalism is used to describe the time evolution for electronic state occupations in a dissipative phonon bath. In the presence of an ac gate voltage, the electronic states are dressed by photons and the interplay between photon and vibrational sidebands produces current characteristics that obey selection rules. Varying the ac parameters allows to tune the tunneling current features. In particular, we show that coherent destruction of tunneling can be achieved in our device

    Nurses' perceptions of aids and obstacles to the provision of optimal end of life care in ICU

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    Contains fulltext : 172380.pdf (publisher's version ) (Open Access

    Las humanidades ante el reto de la educación en México

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    Los trabajos aquí reunidos dan cuenta de los diversos puntos de vista externados alrededor de esta temática, que esperamos sea retomada con cierta periodicidad, pues su índole, vastedad y complejidad, además de su carácter histórico, en continuo cambio, no puede ser resuelto ni agotado en unas cuantas horas, o contenido en unas cuantas páginas
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