333 research outputs found
Modelos de internacionalización de las multilatinas
The following paper addresses an issue that has been gaining importance in today’s world: Multilatinas. Those are companies that have emerged from Latin American developing economies and that during the last decades have been growing really fast in the national and the international field. Through this paper we studied the importance of Multilatinas in the region, their common characteristics and their internationalization processes in order to identify if there is a common pattern in their international moves. Actually, the economic openness of Latin America in the 90s left two options for enterprises: to modernize or to disappear. Therefore, Multilatinas represent the survivors from this phenomenon that flourished in adverse conditions through a process of “learning-by-doing”.El presente trabajo aborda un tema que ha ido ganando importancia en el mundo actual: las Multilatinas. Estas empresas han surgido de las economías en desarrollo de América Latina y durante las últimas décadas han crecido exponencialmente tanto en el ámbito nacional como internacional.A través de este trabajo se estudia la importancia de las Multilatinas en la región, sus características comunes y sus procesos de internacionalización con el fin de identificar si existe un patrón común en sus movimientos internacionales. De hecho, la apertura económica que vivió América Latina en los años 90 dejó dos opciones para las empresas: modernizarse o desaparecer. Por lo tanto, las Multilatinas son las sobrevivientes de este fenómeno que se desarrolló en condiciones adversas a través de un proceso de “Aprender-haciendo”
Modelos de internacionalización de las multilatinas
The following paper addresses an issue that has been gaining importance in today’s world: Multilatinas. Those are companies that have emerged from Latin American developing economies and that during the last decades have been growing really fast in the national and the international field. Through this paper we studied the importance of Multilatinas in the region, their common characteristics and their internationalization processes in order to identify if there is a common pattern in their international moves. Actually, the economic openness of Latin America in the 90s left two options for enterprises: to modernize or to disappear. Therefore, Multilatinas represent the survivors from this phenomenon that flourished in adverse conditions through a process of “learning-by-doing”.El presente trabajo aborda un tema que ha ido ganando importancia en el mundo actual: las Multilatinas. Estas empresas han surgido de las economías en desarrollo de América Latina y durante las últimas décadas han crecido exponencialmente tanto en el ámbito nacional como internacional. A través de este trabajo se estudia la importancia de las Multilatinas en la región, sus características comunes y sus procesos de internacionalización con el fin de identificar si existe un patrón común en sus movimientos internacionales. De hecho, la apertura económica que vivió América Latina en los años 90 dejó dos opciones para las empresas: modernizarse o desaparecer. Por lo tanto, las Multilatinas son las sobrevivientes de este fenómeno que se desarrolló en condiciones adversas a través de un proceso de “Aprender-haciendo”
A robust one-step catalytic machine for high fidelity anti-cloning and W-state generation in a multi-qubit system
We propose a physically realizable machine which can either generate
multiparticle W-like states, or implement high fidelity () anti-cloning of an arbitrary qubit state, in a single step. Moreover
this universal machine acts as a catalyst in that it is unchanged after either
procedure, effectively resetting itself for its next operation. It also
possesses an inherent {\em immunity} to decoherence. Most importantly in terms
of practical multi-party quantum communication, the machine's robustness in the
presence of decoherence actually {\em increases} as the number of qubits
increases.Comment: 4 pages, 2 figure
Ultrafast deterministic generation of entanglement in a time-dependent asymmetric two-qubit-cavity system
We present an efficient scheme for the controlled generation of pure
two-qubit states possessing {\em any} desired degree of entanglement and a {\em
prescribed} symmetry in two cavity QED based systems, namely, cold trapped ions
and flying atoms. This is achieved via on-resonance ion/atom-cavity couplings
which are time-dependent and asymmetric, leading to a trapping vacuum state
condition which does not arise for identical couplings. A duality in the role
of the coupling ratio yields states with a given concurrence but opposing
symmetries. The experimental feasibility of the proposed scheme is also
discussed.Comment: 4 pages, 4 figure
Isolating the chiral contribution in optical two-dimensional chiral spectroscopy using linearly polarized light
The full development of mono- or multi-dimensional time-resolved spectroscopy
techniques incorporating optical activity signals has been strongly hampered by
the challenge of identifying the small chiral signals over the large achiral
background. Here we propose a new methodology to isolate chiral signals
removing the achiral background from two commonly used configurations for
performing two dimensional optical spectroscopy, known as BOXCARS and GRadient
Assisted Photon Echo Spectroscopy (GRAPES). It is found that in both cases an
achiral signal from an isotropic system can be completely eliminated by small
manipulations of the relative angles between the linear polarizations of the
four input laser pulses. Starting from the formulation of a perturbative
expansion of the signal in the angle between the beams and the propagation
axis, we derive analytic expressions that can be used to estimate how to change
the polarization angles of the four pulses to minimize achiral contributions in
the studied configurations. The generalization to any other possible
experimental configurations has also been discussed. %We derive analytic
expressions to changes required to the polarizations in terms of a perturbative
expansion in the angle between the beams and the colinear axis. We also
numerically estimate higher order coefficients which cover arbitrarily large
angles and thus any experimental configuration.Comment: 7 figure
Renormalization scheme for a multi-qubit-network
We present a renormalization scheme which simplifies the dynamics of an
important class of interacting multi-qubit systems. We show that a wide class
of M+1 qubit systems can be reduced to an equivalent n+1 qubit system with n
equal to, or greater than, 2, for any M. Our renormalization scheme faithfully
reproduces the overall dynamics of the original system including the
entanglement properties. In addition to its direct application to atom-cavity
and nanostructure systems, the formalism offers insight into a variety of
situations ranging from decoherence due to a spin-bath with its own internal
entanglement, through to energy transfer processes in organic systems such as
biological photosynthetic units.Comment: 4 pages, 4 figure
Work, heat and entropy production in bipartite quantum systems
In bipartite quantum systems commutation relations between the Hamiltonian of
each subsystem and the interaction impose fundamental constraints on the
dynamics of each partition. Here we investigate work, heat and entropy
production in bipartite systems characterized by particular commutators between
their local Hamiltonians and the interaction operator. We consider the
formalism of [Weimer, EPL, 83:30008, 2008], in which heat (work) is identified
with energy changes that (do not) alter the local von Neumann entropy, as
observed in an effective local measurement basis. We demonstrate the
consequences of the commutation relations on the work and heat fluxes into each
partition, and extend the formalism to open quantum systems where one, or both,
partitions are subject to a Markovian thermal bath. We also discuss the
relation between heat and entropy in bipartite quantum systems out of thermal
equilibrium, and reconcile the aforementioned approach with the second law of
thermodynamics.Comment: 16 pages, 2 figures (to appear in NJP
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