Optimal work extraction from quantum states by photo-assisted Cooper pair tunneling

The theory of quantum thermodynamics predicts fundamental bounds on work extraction from quantum states. As these bounds are derived in a very general and abstract setting, it is unclear how relevant they are in an experimental context, where control is typically limited. Here we address this question by showing that optimal work extraction is possible for a realistic engine. The latter consists of a superconducting circuit, where a LC-resonator is coupled to a Josephson junction. The oscillator state fuels the engine, providing energy absorbed by Cooper pairs, thus producing work in the form of an electrical current against an external voltage bias. We show that this machine can extract the maximal amount of work from all Gaussian and Fock states. Furthermore, we consider work extraction from a continuously stabilized oscillator state. In both scenarios, coherence between energy eigenstates is beneficial, increasing the power output of the machine. This is possible because the phase difference across the Josephson junction provides a phase reference.Comment: Published versio

DNA origami assembled nanoantennas for manipulating single-molecule spectral emission

Optical nanoantennas can affect the decay rates of nearby emitters by modifying the local density of photonic states around them. In the weak-coupling limit, and according to the Fermi's Golden Rule, the emission spectrum of a dye is given by the energy of all the possible radiative transitions weighted by the probability of each of them to occur. By engineering the resonance of a nanoantenna, one can selectively enhance specific vibronic transitions of a dye molecule, thus shaping its emission spectrum. Since interactions between emitters and nanoantennas are known to be position dependent, we make here use of DNA origami to precisely place an individual dye at different positions around a gold nanorod. We show how this relative position between the nanorod and the emitter affects the emission spectrum of the latter. In particular, we observe the appearance of a second fluorescence peak whose wavelength and intensity are correlated with the fundamental plasmonic resonance of the nanorod, which we extract from its photoluminescence spectrum. This second peak results from the selective enhancement of transitions to different vibrational levels of the excitonic ground state, whose energies are in resonance with the plasmonic one. Furthermore, we argue that the drastic alteration of the fluorescence spectrum in some of our samples cannot be accounted for with Kasha's rule, which indicates that radiative and vibrational relaxation dye lifetimes can become comparable through the coupling to the gold nanorods

Challenge of upgrading a core banking system in a Private Bank : how Change Management can support the transition ? [sic]

Comptabilité Contrôle Audi

NIRS: a gadget or a must for critically ill patients?

International audienc

Evaluation métabolique et physiologique de la profondeur de la sédation en réanimation

AIX-MARSEILLE2-BU Méd/Odontol. (130552103) / SudocPARIS-BIUM (751062103) / SudocSudocFranceF

Monitorage de la profondeur d'anesthésie (comparaison des activités corticale et sous-corticale lors de l'induction d'une anesthésie)

AIX-MARSEILLE2-BU Méd/Odontol. (130552103) / SudocPARIS-BIUM (751062103) / SudocSudocFranceF

Nouvelles thérapeutiques dans l'ischémie cérébrale (potentialisation par l'érythropoïétine de l'effet neuroprotecteur des progéniteurs endothéliaux circulants tardifs sur un modèle d'ischémie cérébrale transitoire et focale chez le rat)

AIX-MARSEILLE2-BU Méd/Odontol. (130552103) / SudocSudocFranceF

Réalisation de l'analgésie par le médecin d'unité en opération extérieure pour la pathologie traumatique

AIX-MARSEILLE2-BU Méd/Odontol. (130552103) / SudocPARIS-Bib. Serv.Santé Armées (751055204) / SudocPARIS-BIUM (751062103) / SudocSudocFranceF

Syndrome de Guillain-Barré et myasthénie en réanimation (complications et devenir à long terme)

AIX-MARSEILLE2-BU Méd/Odontol. (130552103) / SudocSudocFranceF