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La nacionalidad de las personas jurÃdicas
Fil: Tenaillon, Alberto M. Universidad de Buenos Aires. Facultad de Derecho. Cátedra Derecho Internacional Público. Buenos Aires, Argentin
Generation of Rb-resonant bright two-mode squeezed light with four-wave mixing
Squeezed states of light have found their way into a number of applications
in quantum-enhanced metrology due to their reduced noise properties. In order
to extend such an enhancement to metrology experiments based on atomic
ensembles, an efficient light-atom interaction is required. Thus, there is a
particular interest in generating narrow-band squeezed light that is on atomic
resonance. This will make it possible not only to enhance the sensitivity of
atomic based sensors, but also to deterministically entangle two distant atomic
ensembles. We generate bright two-mode squeezed states of light, or twin beams,
with a non-degenerate four-wave mixing (FWM) process in hot Rb in a
double-lambda configuration. Given the proximity of the energy levels in the D1
line of Rb and Rb, we are able to operate the FWM in Rb in
a regime that generates two-mode squeezed states in which both modes are
simultaneously on resonance with transitions in the D1 line of Rb, one
mode with the to transition and the other one with the to
transition. For this configuration, we obtain an intensity difference
squeezing level of dB. Moreover, the intensity difference squeezing
increases to dB and dB when only one of the modes of the squeezed
state is resonant with the D1 to or to transition of
Rb, respectively
The good faith principle in contract law and the precontractual duty to disclose: comparative analysis of new differences in legal cultures.
The purpose of this paper is to delineate new similarities and future differences between legal systems, using pre-contractual liability and good faith. Instead of focusing on the differences between common law and civil law, we focus our attention on the gap between Europe, England included, and United States. All over Europe, under the influence of good faith jurisprudence, duty to inform has been extremely broadened. Contemporary debate confirms that European Legal Academia overemphasizes the importance of the quest for central common principles of European private law, like Good Faith and obligation de renseignement, and ignores questions regarding cost-benefit effects of disclosure, parties informational rent seeking and general policy considerations. A stereotyped legal doctrine, concentrating on the influence of EU directives on national legal system and, in some cases, unification as a forthcoming national-positive law can create an undesirable effect in the creation of future case law.
A Micromechanical Model of Hardening, Rate Sensitivity and Thermal Softening in BCC Single Crystals
The present paper is concerned with the development of a micromechanical
model of the hardening, rate-sensitivity and thermal softening of bcc crystals.
In formulating the model we specifically consider the following unit processes:
double-kink formation and thermally activated motion of kinks; the close-range
interactions between primary and forest dislocations, leading to the formation
of jogs; the percolation motion of dislocations through a random array of
forest dislocations introducing short-range obstacles of different strengths;
dislocation multiplication due to breeding by double cross-slip; and
dislocation pair annihilation. The model is found to capture salient features
of the behavior of Ta crystals such as: the dependence of the initial yield
point on temperature and strain rate; the presence of a marked stage I of easy
glide, specially at low temperatures and high strain rates; the sharp onset of
stage II hardening and its tendency to shift towards lower strains, and
eventually disappear, as the temperature increases or the strain rate
decreases; the parabolic stage II hardening at low strain rates or high
temperatures; the stage II softening at high strain rates or low temperatures;
the trend towards saturation at high strains; the temperature and strain-rate
dependence of the saturation stress; and the orientation dependence of the
hardening rate.Comment: 27 pages (LaTeX) and 15 Figures (jpg
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