Fast quantum gates based on Landau-Zener-St\"uckelberg-Majorana transitions

Fast quantum gates are of paramount importance for enabling efficient and error-resilient quantum computations. In the present work we analyze Landau-Zener-St\"uckelberg-Majorana (LSZM) strong driving protocols, tailored to implement fast gates with particular emphasis on small gap qubits. We derive analytical equations to determine the specific set of driving parameters for the implementation of single qubit and two qubit gates employing single period sinusoidal pulses. Our approach circumvents the need to scan experimentally a wide range of parameters and instead it allows to focus in fine-tuning the device near the analytically predicted values. We analyze the dependence of relaxation and decoherence on the amplitude and frequency of the pulses, obtaining the optimal regime of driving parameters to mitigate the effects of the environment. Our results focus on the study of the single qubit $X_{\frac{\pi}{2}}$, $Y_{\frac{\pi}{2}}$ and identity gates. Also, we propose the $\sqrt{\rm{bSWAP}}$ as the simplest two-qubit gate attainable through a robust LZSM driving protocol

Editorial: natural compounds in food safety and preservation

Research Areas: Nutrition & Dieteticsinfo:eu-repo/semantics/publishedVersio

Social Knowledge Management From The Social Responsibility Of The University For The Promotion Of Sustainable Development

The aim is to present approaches on social knowledge management from the perspective of the social responsibility of the University to propose strategies aimed at the promotion of sustainable local development. The social management of the knowledge (GSC) should be one of the central functions of the institutions of education (IE), because the attribute work with and on the knowledge is precisely the raison to be and what distinguishes them from other forms of social organization. The development of cognitive abilities, the search for novel approach problems, participation in the resolution of social problems, the development of collective forms of work and, in a Word, become agencies that manage knowledge responsibly is probably one of the ways that has been lost in the IE for internal and external reasons. In the first sense, dominated two options in dispute: the pursuit of knowledge in itself or knowledge subject to results. On the outside, between the subordination to a technical job market and contribution to innovations that meet probable social background. The above, recognizing that around knowledge of power for personal interest reasons and/or group, confrontations occur on political and economic affairs. But, in sum, these disputes in societies like ours - underdeveloped and lagging - in knowledge may be a veil to not move in directions that combine knowledge with problem solving through responsible for knowledge management forms

Nuclear effects in electron reactions and their impact on neutrino processes

We suggest that superscaling in electroweak interactions with nuclei, namely the observation that the reduced electron-nucleus cross sections are to a large degree independent of the momentum transfer and of the nuclear species, can be used as a tool to obtain precise predictions for neutrino-nucleus cross sections in both charged and neutral current-induced processes.Comment: 11 pages, 7 figures, proceedings of NUINT09, 6th International Workshop of Neutrino-Nucleus Interactions in the Few-Gev Region, Sitges (Spain), May 18-22, 200

Strategies towards sustainability environmental from the local areas and the University

El propósito del presente trabajo es explorar un posible arreglo socioambiental pensado desde lo local que propicie el desarrollo sustentable, por medio del privilegio de la articulación de lo social (ciudadanía y educación) con el medio ambiente (capacidad de renovación). El planteamiento central es que ante un modelo social dominante que es insustentable, en el sentido que refuerza la desigualdad socioeconómica y el deterioro ambiental; se demanda pensar y actuar en formas novedosas e integradoras de lo social con la natural y del presente con el futuro para hacer posible sentar bases para un desarrollo sustentable de largo plazo. Para tal fin, se formula un arreglo que articule lo social (ciudadanía y educación) con el medio ambiente (capacidad de renovación) desde ámbitos locales, por medio de estrategias de acción gestionadas socialmente

Confined photon modes with triangular symmetry in hexagonal microcavities in 2D photonic Crystals

We present theoretical and experimental studies of the size and thickness dependencies of the optical emission spectra from microcavities with hexagonal shape in films of two-dimensional photonic crystal. A semiclassical plane-wave model, which takes into account the electrodynamic properties of quasi-2D planar photonic microcavity, is developed to predict the eigenfrequencies of the confined photon modes as a function of both the hexagon-cavity size and the film thickness. Modes with two different symmetries, triangular and hexagonal, are critically analyzed. It is shown that the model of confined photon modes with triangular symmetry gives a better agreement between the predicted eigenmodes and the observed resonances.Comment: 14 pages, 6 figure