Search results for "CDE"
showing 10 items of 157 documents
Note critique de "regards sur l'éducation : les indicateurs de l'OCDE, 2001"
2001
International audience
Measuring charge based quantum bits by a superconducting single-electron transistor
2002
Single-electron transistors have been proposed to be used as a read-out device for Cooper pair charge qubits. Here we show that a coupled superconducting transistor at a threshold voltage is much more effective in measuring the state of a qubit than a normal-metal transistor at the same voltage range. The effect of the superconducting gap is to completely block the current through the transistor when the qubit is in the logical state 1, compared to the mere diminishment of the current in the normal-metal case. The time evolution of the system is solved when the measuring device is driven out of equilibrium and the setting is analysed numerically for parameters accessible by lithographic alu…
Arrays of Josephson junctions in an environment with vanishing impedance
1999
The Hamiltonian operator for an unbiased array of Josephson junctions with gate voltages is constructed when only Cooper pair tunnelling and charging effects are taken into account. The supercurrent through the system and the pumped current induced by changing the gate voltages periodically are discussed with an emphasis on the inaccuracies in the Cooper pair pumping. Renormalisation of the Hamiltonian operator is used in order to reliably parametrise the effects due to inhomogeneity in the array and non-ideal gating sequences. The relatively simple model yields an explicit, testable prediction based on three experimentally motivated and determinable parameters.
Geometric quantum computation with Josephson qubits
2001
The quest for large scale integrability and flexibility has stimulated an increasing interest in designing quantum computing devices. A proposal based on small-capacitance Josephson junctions in the charge regime in which quantum gates are implemented by means of adiabatic geometric phases was discussed. The proposed works, are in the charge regime where the qubit is realized by two nearly degenerate charge states of a single electron box.
Fast SWAP gate by adiabatic passage
2005
We present a process for the construction of a SWAP gate which does not require a composition of elementary gates from a universal set. We propose to employ direct techniques adapted to the preparation of this specific gate. The mechanism, based on adiabatic passage, constitutes a decoherence-free method in the sense that spontaneous emission and cavity damping are avoided.
Jóvenes que no estudian ni trabajan (NEET): el papel de las competencias básicas
2023
Cuestión prioritaria para las políticas públicas nacionales y europeas, los jóvenes que no trabajan, no estudian ni reciben formación (NEET) corren un riesgo de exclusión más o menos importante según los países. Si bien el nivel de educación desempeña un papel central en estas situaciones, el enfoque de las competencias básicas permite afinar la mirada. En efecto, los datos internacionales muestran que el mismo nivel de diploma no certifica el mismo nivel de competencias en todas partes. ¿Cómo se explican estas diferencias? ¿Hasta qué punto estas competencias protegen contra las situaciones de NEET independientemente del título? Jóvenes que no estudian ni trabajan (NEET): el papel de las co…
Heterogeneous contributions of change in population distribution of body mass index to change in obesity and underweight
2021
From 1985 to 2016, the prevalence of underweight decreased, and that of obesity and severe obesity increased, in most regions, with significant variation in the magnitude of these changes across regions. We investigated how much change in mean body mass index (BMI) explains changes in the prevalence of underweight, obesity, and severe obesity in different regions using data from 2896 population-based studies with 187 million participants. Changes in the prevalence of underweight and total obesity, and to a lesser extent severe obesity, are largely driven by shifts in the distribution of BMI, with smaller contributions from changes in the shape of the distribution. In East and Southeast Asia…
Design of MOS Current Mode Logic Gates – Computing the Limits of Voltage Swing and Bias Current
2005
Minimizing a quality metric for an MCML gate, such as power-delay product or energy-delay product, requires solving a system of nonlinear equations subject to constraints on both bias current and voltage swing. In this paper, we will show that the limits of the swing and the bias current are affected by the constraints on maximum area and maximum delay. Moreover, methods for computing such limits are presented.
Minimum power-delay product design of MCML gates
2008
This paper describes a methodology for the minimization of the power-delay product of MCML gates. The method is based on the novel concept of crossing point capacitance. The methodology was been validated by designing several gates using in an IBM 130 nm CMOS process.
Fundamental rights and the proportionality principle
2017
The paper assesses the widespread use of the test of proportionality in fundamental rights adjudication. While constitutional and human rights courts all over the world appear to be consistently engaged in deploying the test of proportionality in order to assess the permissibility of a given rights limitation, this approach is under severe criticism insofar as it is considered an attack to the very idea of fundamental rights. The paper will discuss this criticism of the use of proportionality, and will provide a defense of its use by courts in light of some basic features of the contemporary discourse of fundamental rights. El artículo evalúa el uso generalizado de la prueba de proporcional…