Tesi sul tema "Physique de l'électron unique"
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Frechengues, Pierre. "Transposition didactique et compléxification conceptuelle : contribution à l'étude du cas de l'électron". Montpellier 2, 1999. http://www.theses.fr/1999MON20057.
Ruggiero, Jérôme. "Stocker et restituer un photon unique". Phd thesis, Université Paris Sud - Paris XI, 2010. http://tel.archives-ouvertes.fr/tel-00551521.
Hemmerle, Arnaud. "Diffusion de rayons X sur une membrane unique : potentiel d'interaction et effets du champ électrique". Phd thesis, Université de Strasbourg, 2013. http://tel.archives-ouvertes.fr/tel-00876946.
Zhou, Xingxing. "Champ asservi sur un état de Fock par rétroaction quantique utilisant des corrections à photon unique". Phd thesis, Université Pierre et Marie Curie - Paris VI, 2012. http://tel.archives-ouvertes.fr/tel-00737657.
Maisonobe, Romain. "Mesure du coefficient de corrélation angulaire a entre l'électron et l'antineutrino dans la désintégration ß du neutron avec le spectromètre aSPECT". Phd thesis, Université de Grenoble, 2014. http://tel.archives-ouvertes.fr/tel-01060163.
Hermelin, Sylvain. "Transport d'un électron unique dans des nanostructures". Phd thesis, Université de Grenoble, 2012. http://tel.archives-ouvertes.fr/tel-00721761.
Hemmerle, Arnaud. "Diffusion de rayons X sur une membrane unique : potentiel d'interaction et effets du champ électrique". Phd thesis, Université de Strasbourg, 2013. http://tel.archives-ouvertes.fr/tel-00993900.
Darquié, Benoît. "MANIPULATION D'ATOMES DANS DES PIÈGES DIPOLAIRES MICROSCOPIQUES ET ÉMISSION CONTRÔLÉE DE PHOTONS PAR UN ATOME UNIQUE". Phd thesis, Université Paris Sud - Paris XI, 2005. http://tel.archives-ouvertes.fr/tel-00011604.
Nous avons caractérisé la géométrie du potentiel et le mouvement des atomes piégés par des mesures de fréquences d'oscillation et d'énergies moyennes.
Pour prouver que ce système est adapté au traitement quantique de l'information, nous montrons que son extensibilité à grande échelle est envisageable. A l'aide d'un modulateur de phase programmable par ordinateur et à partir d'un seul faisceau laser, nous avons généré holographiquement des réseaux de micro-pièges dipolaires pour atomes uniques, chacun des sites étant adressable individuellement.
En vue de réaliser des portes logiques à deux bits quantiques, nous avons choisi de nous orienter vers leur intrication conditionnelle. Celle-ci passe par le contrôle de l'émission de l'atome à l'échelle du photon unique, obtenue à la suite d'une excitation impulsionnelle. Nous avons conçu une chaîne laser délivrant des impulsions nanosecondes. Elle nous assure un contrôle cohérent de la transition fermée (5S1/2, F = 2, mF = 2) vers (5P3/2, F = 3, mF = 3). Nous avons observé des oscillations de Rabi et des battements quantiques sur des atomes uniques. En ajustant la puissance de la chaîne laser pour réaliser des impulsions pi, on obtient une source déclenchable de photons uniques qui présente un flux de hotons important et un faible taux d'impulsions contenant deux photons.
Dulin, David. "Observation de l'activité traductionnelle d'un ribosome unique par microscopie de fluorescence couplée à un système microfluidique". Phd thesis, Université Paris Sud - Paris XI, 2009. http://tel.archives-ouvertes.fr/tel-00538401.
Lottiaux, Renaud. "Gestion globale de la mémoire physique d'une grappe pour un système à image unique : : mise en oeuvre dans le système Gobelins". Rennes 1, 2001. http://www.theses.fr/2001REN10097.
Pouilly, Jean-Pierre. "Détermination du temps d'endurance à une intensité supérieure au seuil ventilatoire à partir d'une épreuve incrémentale unique avec une augmentation continue de la puissance". Saint-Etienne, 2007. http://www.theses.fr/2007STET006T.
Vincent, Romain. "Spintronique moléculaire : étude de la dynamique d'un spin nucléaire unique". Phd thesis, Université de Grenoble, 2012. http://tel.archives-ouvertes.fr/tel-00945672.
Beugnon, Jérôme. "Contrôle de l'état interne d'un atome unique piégé et expériences d'interférences à deux photons : vers l'information quantique avec des atomes neutres". Phd thesis, Université Paris Sud - Paris XI, 2007. http://tel.archives-ouvertes.fr/tel-00185446.
Müller, Markus. "Repliement d'hétéropolymères". Paris 11, 2003. http://www.theses.fr/2003PA112136.
The folding of biopolymers, and proteins in particular, is a longstanding problem in modern molecular biology. The explanation of the basic mechanism at work as well as the characterization of the specific properties that allow a linear sequence of monomers to fold to its native state on a reasonable timescale constitutes a major challenge for statistical physics. In this thesis, we study several aspects of the folding of heteropolymers. As a toy model for protein folding, we consider the simpler case of RNA as described on the level of its secondary structure. For random base sequences, we predict a coil-globule transition in the molten high temperature phase which is succeeded by a glass transition at lower temperature. In the glass phase the sequence heterogeneity manifests itself in the form of modified geometric properties of typical folds of the molecule. Furthermore, we find the energy landscape to be very rugged, with a complex internal structure. We analyze how the characteristics of the low temperature phase can be seen in single molecule experiments and predict that the most interesting results are to be expected at forces around 1 pN. In a second part, we study the lattice polymer problem with the help of the cavity method. This new approach allows for a deeper insight into the nature of the glass transition from the perspective of the local frustration that the individual monomers experience. As a particular bonus, the role of sequence correlations can be analyzed. In the case of a certain type of correlations that might notably be relevant for proteins, we establish that the "classic" freezing transition is preceded by a continuous glass transition leading to a "soft glass" with only a weak degree of ergodicity breaking. The potential of this technique is by no means exhaustively exploited. A variety of future applications, in particular to designed protein sequences or to the RNA folding problem can be imagined
Ardhuin, Thibault. "Étude par STM et NC-AFM des mécanismes de charge de molécules individuelles sur substrats isolants". Thesis, Toulouse 3, 2018. http://www.theses.fr/2018TOU30315.
In recent years, new techniques have emerged to control the charge of individual nano-objects (atom, molecule, metal aggregate or semiconductor, etc.) deposited on insulating substrates. This achievement has been made possible by the refinement of Tunneling Microscopy (STM) and Atomic Force (AFM) methods. By combining these tools, the precursors succeeded in controlling the state of charge of a gold atom deposited on a NaCl (001) bilayer on a Cu (111) substrate. Subsequently, this type of manipulation has been extended to molecular systems, in particular at the CEMES with Cu(dbm)2. This subject is part of the continuity of these studies. The objective was to analyze the impact of the increase of the thickness of the insulating film on the charge mechanisms. This problem requires a quantification of the state of the system charge as well as a measurement of the insulation thickness. In this work, we have been able to study KBr and NaCl films deposited on Cu(111) and Ag(111) surfaces. For these studies, whether in tunnel current (STM) or force gradient (NC-AFM), the control of the tip state is essential. When working on an insulating substrate, the tip tends to collect contaminants that change their electronic properties. However, to charge a system in a reproducible way, we must imperatively control the metallicity of the apex. This control requires a frequent re-preparation of the tip on a metal surface, difficult to find in the case of a thick film. To overcome this scarcity, we have implemented a deposition mask allowing a control of the gradient of the thickness of the insulating film while preserving clean metal zones. This allowed us to carry out our measurements with a better controlled state of the tip. The instability of the tip state has also led us to perform Z (V) regulated current spectroscopies. By controlling this current, it is then possible to minimize the interaction between the tip and the insulating film, thus making the tip last longer. These Z (V) spectroscopies also make it possible to increase the measurement voltage until reaching the field emission regime. We have observed a variation of the modulation of the field emission resonances (FER) amplitude as a function of the thickness of the insulating film. [...]
Deshpande, Veeresh. "Intégration de transistor mono-électronique et transistor à atome unique sur CMOS". Phd thesis, Université de Grenoble, 2012. http://tel.archives-ouvertes.fr/tel-00844406.
Fiszman, Nicolas. "Etude de cinétique de la traduction eucaryote à l'échelle de la molécule unique". Phd thesis, Palaiseau, Institut d'optique théorique et appliquée, 2013. http://pastel.archives-ouvertes.fr/pastel-00939858.
Urdampilleta, Matias. "Spintronique moléculaire de la vanne de spin à la détection d'un spin unique". Phd thesis, Université de Grenoble, 2012. http://tel.archives-ouvertes.fr/tel-00770488.
Loumaigne, Matthieu. "Spectroscopie de nanosondes hybrides à coeur métallique". Phd thesis, Université Paris Sud - Paris XI, 2009. http://tel.archives-ouvertes.fr/tel-00841260.
Boukari, Khaoula. "De la molécule unique au tapis supramoléculaire sur surface de silicium passivée : Simulations numériques à l'échelle atomique". Thesis, Mulhouse, 2013. http://www.theses.fr/2013MULH8858/document.
My thesis presents the study of the adsorption of single molecules and molecular self-assembly, by numerical simulations at the atomic scale, on a boron doped silicon surface denoted Si(111)(√(3 ) x√3)R30°-B. After presenting the calculation methods and describing the surface model, this thesis is made of two parts: the first one is about the adsorption of single molecules and the second one is devoted to the formation of supramolecular network. In the first part, I studied the adsorption of single molecules on the silicon surface doped boron Si (111)(√(3 ) x√3)R30°-B. I have investigated the adsorption mechanisms of three different molecules: a molecule of pyridyl-azobenzene, a molecule of the family of porphyrin (Cu-TBBP) and two molecules which belong to the family of phtalocyanine (H2Pc and CuPc). For every molecule, I conducted energetic, structural and electronic studies. In most of the cases, I completed this work by calculating STM images in order to compare with experimental results. The second part of this thesis deals with the study of self assembly of organic molecules on the surface of Si(111)(√(3 ) x√3)R30°-B. Molecular self assembly is a technique which allows the formation of highly organized architectures at the atomic scale. I have studied three different molecules forming self assembly on the surface of Si (111)(√(3 ) x√3)R30°-B : 1,3,5-tri(4-bromophenyl benzene) denoted TBB, 1,3,5-tri(4-iodophenyle benzene) denoted TIB et 1,3,5-triphenylbenzene denoted THB. As the formation of a self organized network is a result of equilibrium between molecule-molecule interaction and molecule-substrate one, I have evaluated the interaction energies by using different approximations (LDA, GGA and GGA+D). Then, I have studied the electronic properties of these assemblies by calculating the projected density of states, the charge difference and the Laplacien of the charge or the ELF function (Electronic Localization Function). In order to compare our results with experimental ones, STM images calculations were performed by using two different approaches: the approach of Tersoff-Hamann and the multi-scattering approach proposed by bSKAN code. Finally, I have studied the growth of C60 molecules on the self organized network formed by the TBB molecules deposited on the Si (111)(√(3 ) x√3)R30°-B surface. The energetic study shows that C60 molecules are adsorbed preferentially in the hexagonal nanopores in agreement with the STM observations
Morin, Olivier. "Mesures et états non-gaussiens en information quantique". Phd thesis, Université Pierre et Marie Curie - Paris VI, 2013. http://tel.archives-ouvertes.fr/tel-01066655.
Le, Gall Antoine. "Pince optique et microscopie de fluorescence pour l'étude de la synthèse des protéines en molécule unique". Phd thesis, Université Paris Sud - Paris XI, 2011. http://tel.archives-ouvertes.fr/tel-00647915.
Fève, Gwendal. "Quantification du courant alternatif : la boîte quantique comme source d'électrons uniques subnanoseconde". Paris 6, 2006. http://www.theses.fr/2006PA066608.
Messin, Gaëtan. "Sources de lumière pour l'information quantique". Habilitation à diriger des recherches, Université Paris Sud - Paris XI, 2008. http://tel.archives-ouvertes.fr/tel-00347157.
L'ensemble de mes activités de recherche s'inscrit dans ce mouvement. Mes travaux ont porté en grande partie sur les sources de photons uniques et les sources de paires de photons, ainsi que leurs applications à la cryptographie quantique, à la téléportation quantique et au calcul quantique. Mes travaux s'ouvrent maintenant sur la suite: variables continues, mémoires quantiques et téléportation d'états non classiques sont probablement les prochaines étapes.
Thalineau, Romain. "Qubits de spin : de la manipulation et déplacement d'un spin électronique unique à son utilisation comme détecteur ultra sensible". Phd thesis, Université de Grenoble, 2012. http://tel.archives-ouvertes.fr/tel-00875970.
Bernaud, Julien. "Propriétés physiques de capsides virales étudiées à l'échelle du virus unique par microscopie à force atomique : exemples du rétrovirus VIH-1 et du parvovirus AAV". Thesis, Lyon, École normale supérieure, 2015. http://www.theses.fr/2015ENSL1028/document.
Viruses are nanometer size biological parasite, which highjack the cellular machinery of the infected cells to replicate and thereby produce new viruses. A virus consists of a protein capsid, protecting the viral genome, a long polymer of DNA or RNA, and in some cases is surrounded by a lipid envelope. Recent work suggests that the physical properties of viruses are important in order to understand the viral cycle. In order to link the biological behavior of the virus to their physical properties, we used an approach combining AFM imaging and mechanical measurements at the nanometer scale, in connection with the physical modeling of viral capsids. We have developed automated image and force curves analysis tools to quantify the physical properties of viral capsids and the effect of the microenvironment. We have focused on two very different viruses: the HIV-1 retrovirus, responsible for AIDS and the AAV vector used in gene therapy. This work has led to the characterization of the morphological and mechanical properties of virus-like particles and cores of HIV-1 at the single virus level and on populations of hundreds of viruses. Focusing on the effect of the nature of the RNA encapsidated inside the viral particles in cellulo, we have highlighted the structural control of the viral RNA, and more precisely the psi packaging signal, on both HIV-1 VLPs and cores. Finally, we have initiated the study of the effect of reverse transcription (conversion of viral genomic RNA into DNA) within the cores HIV-1 on its stability. The study of parvovirus AAV existing form of several natural variants (serotypes) allowed us to compare the capsid physical properties at thermodynamic equilibrium and out of equilibrium. By varying the microenvironment (temperature and pH), we probed its influence on the stability of the AAV capsid. We have shown in particular that the AAV8 virus is stiffer than AAV9 while thermal stability is reduced, in relation to different biological properties for these two serotypes. In addition, the rigidity of AAV8 capsids decreases in an acidic environment mimicking the late endosome transport, and this results in a higher thermal stability. Finally, we quantified the effect of the length and nature of the confined genome on the thermal stability of AAV capsids
Brunet, Annaël. "Etude à l'échelle de la molécule unique des changements conformationnels de la molécule d'ADN : influence de la présence de défauts locaux présents sur l'ADN et de paramètres physico-chimiques de la solution environnante". Thesis, Toulouse 3, 2015. http://www.theses.fr/2015TOU30168/document.
Ions play an important role in many biological processes affecting the DNA molecule, both for binding activities of DNA-protein interaction, and the DNA packaging in viral capsids or in the cell nucleus. Proteins actions on DNA are also often associated to the double helix curvature, be it because of an intrinsic curved sequence, or of the ability of the proteins, to curve the sequence they are trying to bind. Being able to characterize and understand the effects on the DNA conformation of ions present in solution, DNA local curvature, and local denaturation bubble is essential and crucial for the thorough understanding of many biological processes. Many experimental, and theoretical studies have already been conducted to address these questions. However they remain highly debated. To answer then one must notably develop experimental approaches that minimize alteration of the conformation of the DNA molecule or the complex protein-DNA, as well as associated theoretical models that permit a precise analysis of experimental data as well as their physical understanding. The goal of this work is to develop and propose experimental and theoretical tools which would provide a physical description of the influence of DNA local defects on the DNA molecule as well as of physicochemical conditions of the DNA environmental solution. For this purpose, experimental data have been collected, at a single molecule level, using the High-Throughput Tethered Particle Motion" (HT-TPM) technique. TPM consists of recording the location of a particle grafted by one end of a single DNA molecule and immobilized, at the other end, to a glass surface. The use of a biochip that enables the parallelization of DNA/particle complexes and the ensuing high-throughput data acquisition permitted to obtain a large accumulation of individual statistics. A strong analysis procedure has been developed to extract and quantify the amplitude of motion of the valid DNA/particle complexes . Alongside that, simulations have been run, based on a mesoscopic statistical mechanics model in which the DNA molecule is related to a chain of monomers with varying radius and in which the amplitude of motion is governed by both the Brownian motion and by the interaction potential associated to stretching and bending energies of the polymer. A first study was conducted on the effect of the ionic strength induced by surrounding ions in solution on the DNA persistence length (Lp) which characterizes the DNA polymer rigidity. The extracted Lp values of HT-TPM measurement decrease from 55 to 30 nm when the ionic strength increases. A stronger decrease was observed in presence of divalent ions Mg2+ than with monovalent ions Na+. This quantification of Lp dependence, on a large and strongly prospected range of ionic strengthes, tends to validate the theoretical approach proposed in 2006 by Manning in presence of monovalent ions Na+. A second project allows us to develop a method of evaluation and quantification of local DNA bending angles, induced either by specific intrinsic sequence, or by the binding of proteins on DNA. Constructs made of 575 base-pair DNAs with in-phase assemblies of one to seven sequences CAAAAAACGG was used. A theoretical description of the polymer chain, named "kinked Worm-Like Chain" was proposed which leads to a simple formulation of the end-to-end distance of DNA molecules allowing to extract local bend angles from HT-TPM measurement. As a result, we find that the sequence CAAAAAACGG induces a bend angle of 19° ± 4° in agreement with other value from the literature. A third study concerning the influence of temperature-induced partial denaturation on the global apparent rigidity parameters of the polymer was conducted. Preliminary results are proposed
Reymond, Georges-Olivier. "Etudes expérimentales d'atomes dans un piège dipolaire microscopique". Phd thesis, Université Paris Sud - Paris XI, 2002. http://tel.archives-ouvertes.fr/tel-00002178.
Au, Thi Huong. "Optimisation et manipulation d'une source de photons uniques par des structures photoniques 2D et 3D à base de matériau polymère à température ambiante". Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLN046.
The thesis has been devoted to study the controlled coupling of a colloidal quantum dot (QD) based single photon source (SPS) into multidimensional polymeric photonic structures by using low-one photon absorption (LOPA) direct laser writing (DLW) technique. The thesis consists of three main parts:The first part addresses the characteristic optimization of the CdSe/CdS based SPS. The excitation wavelength dependence of the QDs was investigated. By using 532 nm, only the core of the QD is excited with the suppression of the Auger effects. Thus, this approach allows for obtaining the suppression of fluorescence intermittency and a stable single-photon emission at ambient conditions. In order to obtain the long-term high fluorescence quality of the QDs, we then studied the influence of the local dielectric medium on the optical properties of the QDs. By incorporating the QDs into a photoresist (SU-8), we demonstrated that the polymeric environment not only enables the long-term preservation of the QD with high photostability but also provides us excellent accessibility to fabricate polymeric structures containing SPS.In the second part, the LOPA-based DLW is employed for the coupling of single QD into various photonic structures. Two devices including submicropillar dielectric antenna and 3D membrane bulleye cavity are theoretically and experimentally investigated to enhance the fluorescence emission of the single QD in terms of far-field angular radiation pattern and the spontaneous radiative emission of the emitter.In the third part, the manipulation of SPS is demonstrated by coupling the single QD into multidimensional magneto-photonic structures. With the aid of an external magnetic field, the controllable movement of the coupled QD was performed in the fluidic environment. The position and orientation of the SPS coupled in the structure were manipulated on demand. The mechanical, magnetic and optical properties of the device are investigated showing the multifunctional capabilities of magneto-photonic structures
Meglio, Adrien. "Micro-manipulation de l'ADN : vers une visualisation directe par microscopie de fluorescence". Phd thesis, Université Pierre et Marie Curie - Paris VI, 2010. http://tel.archives-ouvertes.fr/tel-00558689.
Parent, Samuel. "Conception, caractérisation et optimisation de SPAD en technologie Dalsa HV CMOS 0.8 μm pour intégration dans un 3D-SiPM". Mémoire, Université de Sherbrooke, 2016. http://hdl.handle.net/11143/8850.
Abstract : Single Photon Avalanche Diodes (SPAD) generate much interest in applications which require single photon detection and excellent timing resolution, such as high energy physics and medical imaging. In fact, SPAD arrays such as Silicon PhotoMultipliers (SiPM) are gradually replacing PhotoMultiplier Tubes (PMT) and Avalanche PhotoDiodes (APD). There is now a trend moving towards SPAD arrays in CMOS technologies with smart pixels control for high timing demanding applications. Making SPAD in commercial CMOS technologies provides several advantages over optoelectronic processes such as lower costs, higher production capabilities, easier electronics integration and system miniaturization. However, the major drawback is the lack of flexibility when designing the SPAD architecture because all fabrication steps are fixed by the CMOS technology used. Another drawback of CMOS SPAD arrays is the loss of photosensitive areas caused by the CMOS circuits integration. This document presents SPAD design, characterization and optimization made in a commercial CMOS technology (Teledyne DALSA 0.8 µm HV CMOS - TDSI CMOSP8G). Custom process variations have been performed in partnership with the CMOS foundry to optimize the SPAD while keeping the CMOS line compatibility. The realized SPAD and SPAD arrays are dedicated to 3D integration with either low-cost TDSI CMOS electronics or advanced deep sub-micron CMOS electronics to perform a 3D digital SiPM (3D-SiPM). The novel 3D-SiPM is intended to replace PMT, APD and commercially available SiPM in timing demanding applications. The group main objective is to develop a 10 ps timing resolution 3D-SiPM for use in high energy physics and medical imaging applications. Those applications require reliable technologies with a certified production capability, which justifies the actual effort to use commercial CMOS line to develop our 3D-SiPM. This dissertation focuses on SPAD design, characterization and optimization made in the TDSI-CMOSP8G technology.
Meunier, Nathalie. "Caractérisations de détecteurs à base de tellurure de cadmium pour l'imagerie radiologique". Université Joseph Fourier (Grenoble), 1994. http://www.theses.fr/1994GRE10123.
Biadala, Louis. "Propriétés optiques de nanocristaux de CdSe/ZnS individuels à basse température". Phd thesis, Université Sciences et Technologies - Bordeaux I, 2010. http://tel.archives-ouvertes.fr/tel-00654493.
Bounouar, Samir. "Corrélation de photons sur un émetteur de photons uniques semi-conducteur à température ambiante". Phd thesis, Université de Grenoble, 2012. http://tel.archives-ouvertes.fr/tel-00727393.
Nguyen, Ngoc viet. "Synthèse et transport électronique dans des nanotubes de carbone ultra-propres". Phd thesis, Université de Grenoble, 2012. http://tel.archives-ouvertes.fr/tel-00859810.
Yeo, Inah. "Une boite quantique dans un fil photonique : spectroscopie et optomécanique". Phd thesis, Université de Grenoble, 2012. http://tel.archives-ouvertes.fr/tel-00809344.
Karim, Yacin. "Vers une vérification expérimentale de la théorie de la relativité restreinte : réplication des expériences de Charles-Eugène Guye (1907-1921)". Phd thesis, Université Claude Bernard - Lyon I, 2011. http://tel.archives-ouvertes.fr/tel-00839315.
Ferhat, Karim. "Fluctuations quantiques dans des systèmes de spins et de charges en interaction". Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAY087/document.
This thesis focuses on two different spin and charge systems, interacting under the effect of quantum fluctuations.The first project highlights the phase diagram of interacting electrons on a kagome lattice. This diagram is driven by two Coulomb repulsions. The first is a on site repulsion, and the second a nearest neighbor one. These two repulsions are in competition with quantum fluctuations of electronic charges. Four phases are depicted, two are unknown and the two other are in agreement with the literature. The two new phases are stabilized in the strong on site repulsion regime. When nearest neighbor repulsions are strong enough to induce a charge local constraint, the system enters in a so called Heisenberg-Loop Phase. These loops are antiferromagnetically arranged and can be described by a Heisenberg-like model in which both charge and spin play surprisingly a role in the exchange interaction. The second new phase is stabilized in the regime where nearest neighbor interactions are too weak to maintain the local constraint. Then, half of the electrons are delocalized in unidimensional Bloch states similar to quantum polarized electronic bubbles. These bubbles are trapped in an inversely polarized electronic cristal formed by the other electrons. This peculiar phase is favored by both quantum charge fluctuations in the bubbles, and antiferromagnetic exchanges between their electrons and the cristal ones.The second project deals with a Terbium Double-Decker molecular magnet. This molecule is modeled by three interacting degrees of freedom. The first is a nuclear spin of the Terbium ion, and the second is the electronic spin of this same ion. The two spins interact via a magnetic exchange.In a first approximation, the effect of the electronic spin is to induce a dipolar field. Finally, the last degree of freedom is carried by two ligands under the influence of the dipolar field. The ligands play the role of a read-out quantum dot, and by conductance measurements through this last one, we can probe the electronic spin and then, the nuclear spin. The first step of this project highlights the modeling of the global system. Then numerical computations are depicted and are in a quantitative agreement with the experimental measurements realized during the thesis of Stefan Thiele and Clément Godfrin.On the other hand, by applying electrical Radio Frequency Fields, we can drive quantum fluctuations on the nuclear spin. This quantum manipulation of the spin is realized by the dynamic deformation of the electron cloud under the effect of the Radio Frequency Field. As a result, we are able to implement a Grover Quantum Algorithm on the nuclear field. This thesis focuses on the realization of a simulation program that was a tool used by Clément Godfrin to successfully implement the Grover Algorithm
Ngalamou, Pideu Lucien Aimé. "Résonateur composite à base de polymère piézoélectrique pour la mesure de forces statiques : instrumentation et étude". Université Joseph Fourier (Grenoble), 1994. http://www.theses.fr/1994GRE10236.
Jelescu, Ileana O. "Magnetic resonance microscopy of Aplysia neurons : studying neurotransmitter-modulated transport and response to stress". Phd thesis, Université Paris Sud - Paris XI, 2013. http://tel.archives-ouvertes.fr/tel-00979419.
Yi, Jue-Min. "Diffraction of single holes through planar and nanostructured metal films". Phd thesis, Université de Strasbourg, 2013. http://tel.archives-ouvertes.fr/tel-01018454.
Lachance, Brigitte. "Exploration de l’impact d’un programme de danse-thérapie sur la mobilité de personnes atteintes de condition neurologique : un devis expérimental à cas unique". Thesis, 2020. http://hdl.handle.net/1866/25202.
Background: Several therapeutic approaches are used to improve mobility in rehabilitation settings. Dance therapy is one of the innovative approaches for populations with neurological disorders. A quasi-experimental study with a control group did not provide evidence to support the effectiveness of a 12-week weekly outpatient dance therapy program for persons with physical disability (DTPD) aimed at improving their mobility. Given the perceived benefits of the intervention, further investigation was important. Method: We conducted a single case experimental design (SCED) with the Tau-U statistic over 28 weeks with repeated measures (4 tools to assess mobility) in the pre-dance phase (A1), dance program phase (B) and post-dance phase (A2). The Flow State Scale and the Activity-specific balance confidence scale (ABC) provided scores pre-and post intervention. Results: Five participants significantly (p <0.05) improved scores for the Mini BESTest (MBT), 2/5 for the 4 Square Step Test (4Sq) and 4/5 for the Multi-Directional Reach Test – Behind (MDRT- behind) with very large effect sizes (ES). Aggregated ES for A1 and A2 went from moderate to very large. Changes on the FSS and ABC scales were not significant. Personal objectives were perceived and measured as attained. Conclusions: These results support the effectiveness of the DTPD program for adults with neurological conditions, and for the use of SCED with the Tau-U statistic to explore effectiveness of dance interventions for heterogeneous cohorts. The tools used to measure mobility appear promising to detect changes due to dance.
Beguin, Lucas. "Mesure de l'interaction de van der Waals entre deux atomes de Rydberg". Phd thesis, 2013. http://pastel.archives-ouvertes.fr/pastel-00936072.