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Dissertations / Theses on the topic 'Atomo'

Author: Grafiati
Published: 4 June 2021
Last updated: 27 April 2022

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1

Popovas, Jevgenijus. "Atomo orbitalių grafinis vaizdavimas." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2005. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2005~D_20050616_161557-72803.

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2

Ferreira, Cláudia Pio. "Alinhamento Iônico na fotoionização do átomo de hélio por luz polarizada." Universidade de São Paulo, 1997. http://www.teses.usp.br/teses/disponiveis/76/76131/tde-19092008-095832/.

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Neste trabalho, descrevemos os conceitos de alinhamento e orientação baseados no formalismo de Fano e Macek e estudamos a fotoionização do estado fundamental do átomo de Hélio. Para isso usou-se uma função de onda aproximada obtida a partir da diagonalização do operador de Gailitis- Damburg. A anisotropia do sistema formado após a colisão foi caracterizada através do cálculo da densidade eletrônica do íon e através do tensor de alinhamento e do vetor de orientação. O comportamento destes parâmetros para as transições n? -> 1s e n->n-1 em função de n (número quântico principal do íon) foi grafi
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3

Fedurtsya, Anton. "Neutronų ir protonų pasiskirstymo atomo branduolio sluoksniuose skaičiavimas." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2010. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2010~D_20100614_164230-58314.

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Pagrindinis šio baigiamojo darbo tikslas yra pilnas, A. Deveikio realizuoto neutronų ir protonų pasiskirstymo atomo branduolio sluoksniuose algoritmo ir realizuotos programos, išanalizavimas ir vietų, duosiančių reikšmingą pagreitinimą algoritmo skaičiavimams ir konfiguravimams atlikti, paieška. Darbą sudaro penkios struktūrines dalys. Pirmoje dalyje yra aprašyti optimizavimo metodai ir pateikti atliktų bandymų, įrodančių optimizuotų fragmentų privalumus, rezultatai. Antrą darbo dalį sudaro trumpas esamo algoritmo logikos aprašymas. Trečia ir ketvirta darbo dalys yra pagrindinės, jose aprašyta
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4

Juršėnas, Rytis. "Algebrinis daugiadalelės trikdžių teorijos plėtojimas teorinėje atomo spektroskopijoje." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2010. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2010~D_20101223_152955-40113.

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Šis darbas yra skirtas šiuolaikinės atomo trikdžių teorijos matematinio aparato, paremto efektinių operatorių formalizmu, plėtojimui. Darbe nuosekliai ir sistemingai, pradedant nuo pačių bendriausių principų, nagrinėjami Foko erdvės apribojimo į redukavimo grupių neredukuotinus poerdvius metodai bei pateikiama neredukuotinų tenzorinių operatorių, charakterizuojančių fizikines ir efektines sąveikas, klasifikacija bendrais ir tam tikrais atskirais atvejais. Gautos išraiškos ir iš jų išplaukiančios išvados yra grindžiamos matematine kalba. Dauguma esminių rezultatų yra suformuluoti teoremų pavida
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5

Rynkun, Pavel. "Biortogonalių orbitalių metodo plėtojimas ir taikymas atomo teorijoje." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2014~D_20140616_091214-15206.

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Disertacijos tikslai: išplėtoti biortogonalių orbitalių metodą energijų ir kitų svarbių atominių charakteristikų skaičiavimui; gauti tikslesnes atomines charakteristikas (energijos lygmenis, šuolių tikimybes, lygmenų gyvavimo trukmes) ab initio metodu. Disertacija sudaryta iš šešių skyrių. Pirmas skyrius yra įvadinis. Jame pristatomi disertacijos tikslai, uždaviniai ir ginamieji teiginiai. Antras skyrius skirtas disertacijoje naudojamiems ir kuriamiems teoriniams metodams aprašyti. Jame aprašomas naujai sukurtas PCFI artinys paremtas biortogonaliomis transformacijomis ir aprašomi, kokie pakeit
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6

Grybaitė, Rita. "Ce I atomo energijos spektro ir šuolių tyrimas vienkonfigūraciniu Hartrio ir Foko artiniu." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2009. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2009~D_20090629_130243-69770.

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Darbą sudaro 2 skyriai. Pirmajame skyriuje yra pateikiama trumpa literatūros apžvalga. Antrajame skyriuje yra aprašomas rezultatų aptarimas eksperimentinio ir teorinio energijos spektro palyginimas grafiškai ir skaičiavimo metodu; šuolių tipai bei jų pasiskirstymas ir tikimybės. Darbo prieduose pateikiami eksperimentiniai skaičiavimo rezultatai.<br>The work consists of 2 chapters. Chapter 1 deals with a short literature review. Chapter 2 deals with experimental and theoretical energy spectrum comparison in diagram form and calculating form, and their results’ analysis; bound types and their di
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7

Labanauskaitė, Lina. "Elektros srovės, geometrinės optikos, atomo branduolio fizikos mokomieji bandymai ir jų loginė analizė." Bachelor's thesis, Lithuanian Academic Libraries Network (LABT), 2011. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2010~D_20110103_162236-40276.

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Bakalauro dabą „Elektros srovės, geometrinės optikos, atomo branduolio fizikos mokomieji bandymai ir jų loginė analizė“ susideda iš įvado, 3 skyrių, išvadų ir 28 literatūros šaltinių. Darbo apimtis 66 puslapiai. Pirmoje ir antroje dalyje apžvelgiama pedagogikos ir psichologijos literatūros šaltinių analizė. Trečioje dalyje yra aprašomi XII klasės fizikos kurso mokomieji bandymai ir jų loginės samprotavimo schemos iš: • Elektros srovės (9 eksperimentai). • Geometrinės optikos (8 eksperimentai). • Atomo branduolio fizikos (5 eksperimentai). Samprotavimo schemos planai padeda mokiniams: suprasti
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8

Romanelli, Lilavate Izapovitz. "Concepções do professor sobre seu papel mediador na construção do conhecimento do conceito atomo." [s.n.], 1992. http://repositorio.unicamp.br/jspui/handle/REPOSIP/252762.

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Orientador : Maria Cecilia Rafael de Goes<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Educação<br>Made available in DSpace on 2018-07-14T02:23:36Z (GMT). No. of bitstreams: 1 Romanelli_LilavateIzapovitz_D.pdf: 15007989 bytes, checksum: b24c1496ecd9b6b0d536b40731b40730 (MD5) Previous issue date: 1992<br>Resumo: Este Trabalho foi desenvolvido a partir de um interesse nas relações que se estabelecem entre aluno, professor e objeto de conhecimento,no ensino da Química no nível de segundo grau, quando são abordados conceitos que envolvem noções abstratas requerem a conce
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9

D'Emilio, Gianluca. "Applicazioni del metodo variazionale ad alcuni problemi di fisica atomica e nucleare." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amslaurea.unibo.it/15411/.

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Utilizzando il metodo variazionale si studiano alcuni sistemi con l’obiettivo di approssimare l’energia del loro stato fondamentale. I casi trattati in questa tesi vertono su problemi di natura atomica, quali la descrizione degli atomi di idrogeno, elio e dell’atomo muonico, e su problemi di carattere nucleare, quali la stima dell’ampiezza del potenziale di Yukawa e la descrizione del deutone.
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10

Dalla, Filippo. "Campi elettromagnetici generati da cariche accelerate e limiti della elettrodinamica classica." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/18364/.

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Questa tesi analizza il campo elettromagnetico generato da una carica elettrica puntiforme in moto accelerato, con particolare attenzione alla potenza irradiata. Vengono poi mostrate le incongruenze che emergono dall'applicazione dei risultati ottenuti e che hanno portato storicamente al superamento della Elettrodinamica Classica. Infine viene esaminato il modello atomico di Rutherford e viene mostrata l'impossibilità della sua stabilità in Elettrodinamica Classica, come conseguenza della radiazione emessa, giustificando la necessità di una teoria quantistica più avanzata.
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11

Juškėnas, Robertas. "Triciklių heterosistemų, turinčių pirazolo[3,4-d]pirimidino fragmentą, sintezė. Intramolekulinės pirimidino azoto atomo reakcijos su O,O-acetaliais tyrimas." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2014~D_20140630_154058-49723.

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Heterociklų chemijos vystymasis turi didelę reikšmę įvairioms mokslo sritims ir pramonės raidai. Pagrindinis šios chemijos srities uždavinys – kurti naujus heterociklinių junginių sintezės metodus, leidžiančius paprasčiau, efektyviau gauti norimos struktūros junginius. Tai apima ne tik heterociklų formavimo būdus, bet ir jų funkcionalizavimą, leidžiantį sukurti įvairiomis cheminėmis ir fizikinėmis savybėmis pasižyminčių junginių įvairovę. Šios mokslo srities pasiekimai pritaikomi biochemijoje, farmacijoje, fotofizikoje ir kitose mokslo ir pramonės šakose. Šiame darbe buvo siekiama sukurti efek
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12

Glodenienė, Marina. "Koreliaciniai efektai Fe X jonui." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2007. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2007~D_20070816_171236-90093.

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Magistriniame darbe yra nagrinėjami FeX elemente esantys koreliaciniai efektai. Tuo tikslu šiam elementui buvo išskirtos koreliacinės grupės, atsižvelgiant į tai kokio tipo sužadinimai imami konstruojant atominės būsenos funkciją. Teoriniai nagrinėjimai buvo atliekami naudojantis GRASP2K programą ir Bendrosios fizikos katedros klasterį. Iš gautų darbe rezultatų buvo nustatyta, kad svarbią įtaką Fe X elemento charakteristikoms turi valentinės-valentinės ir kamieno-valentinės koreliacijos. Tuo tarpu kito tipo koreliacijos yra antraeilės. Atsižvelgiant į tai, magistriniame darbe yra sukurta Fe X
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13

Treutlein, Philipp. "Coherent manipulation of ultracold atoms on atom chips." Diss., kostenfrei, 2008. http://edoc.ub.uni-muenchen.de/9153/.

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14

Di, Meco Lorenzo. "Teoria variazionale con alcune applicazioni in fisica atomica e nucleare." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/18374/.

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Il metodo variazionale è uno schema computazionale che permette il calcolo approssimato dell’energia e della funzione d’onda dello stato fondamentale di una grande varietà di sistemi quantistici che compaiono in fisica molecolare, atomica e nucleare. In questa tesi vengono illustrati il metodo variazionale e le sue modalità di implementazione. Vengono poi descritte diverse applicazioni: lo studio di alcuni sistemi atomici, quali l’atomo di idrogeno, di elio e l’atomo muonico, e del deutone, per ricavarne un’approssimazione dell’autovalore di energia dello stato fondamentale; si studia infine
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15

Quichaud, Viviane. "Etude des processus elementaires : de synthese de la molecule no, en post-decharge en ecoulement, de collisions titane-gaz rares, titane-molecules, par perturbation laser resolue en temps." Paris 6, 1987. http://www.theses.fr/1987PA066135.

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I. Etude de la preparation des etats excites de no dans un dispositif de post-decharge en ecoulement a partir de n::(2) excite (prepare par transfert d'excitation a partir d'atomes ar metastables dans une decharge basse pression) et de o (obtenu par dissociation de o::(2) dans une decharge de he). Observation d'une emission intense des bandes gamma de no, qui implique un etat a courte duree de vie (b) de n::(2) et le premier etat metastable de o. Ii. Analyse des processus d'extinction et de transfert d'excitation a partir d'etats a courte duree de vie de ti (crees dans un dispositif a cathode
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16

Pace, Marzia. "L'atomo di idrogeno: righe, serie e sua importanza in astrofisica." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/12821/.

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Nell'elaborato si analizza l'atomo di idrogeno: partendo da osservazioni sulla sua struttura chimico-fisica, si procede verso l'analisi delle sue righe e serie più importanti con riferimenti alle varie teorie formulate in merito, nel corso degli anni. In seguito si tratta il problema dal punto di vista quantistico, con riferimenti generalizzati per atomi idrogenoidi. Si procede quindi con l'analisi degli stati, molecolare,atomico e ionizzato, in cui possiamo trovarlo, riferendoci per ognuno di essi agli ambienti galattici nei quali sono ubicati e all'importanza che hanno nello studio della mat
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17

Ribeiro, Sofia. "Atom-surface interactions with Rydberg atoms : an application to hybrid systems." Thesis, Imperial College London, 2013. http://hdl.handle.net/10044/1/24166.

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This thesis focuses on theoretical quantum optics, with special emphasis on developing protocols in which engineered vacuum forces enable one to construct hybrid systems. In these systems, atoms are combined with solid-state devices in order to take advantage of their unique properties such as long coherence times of atoms and flexibility, tunability, scalability, and fast response offered by solid-state systems. Special attention is given to the study of atom-surface interactions with Rydberg atoms, where exact Fano-type diagonalization of the interaction Hamiltonian is obtained showing that,
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18

Hu, Zhen Kimble H. Jeff Kimble H. Jeff. "Quantum optics with cold atoms--nonlinear spectroscopy and road toward single-atom trap /." Diss., Pasadena, Calif. : California Institute of Technology, 1995. http://resolver.caltech.edu/CaltechETD:etd-10112007-092812.

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19

Koutit, Abbès. "Reactions chaudes entre atomes de tritium et composes inorganiques (h : :(2)o, h::(2)s, nh::(3))." Université Louis Pasteur (Strasbourg) (1971-2008), 1986. http://www.theses.fr/1986STR13029.

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20

Fergani, Hadi. "Metal-atom-mediated chemical transformations, the reaction of group 13 metal atoms with arenes." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape7/PQDD_0017/MQ46480.pdf.

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21

Meister, Matthias [Verfasser]. "Novel concepts for ultra-cold quantum gases in microgravity : equal trap frequencies, atoms trapped by atoms, and the space atom laser / Matthias Meister." Ulm : Universität Ulm, 2019. http://d-nb.info/120207653X/34.

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22

Volotka, Andrey V. "High-precision QED calculations of the hyperfine structure in hydrogen and transition rates in multicharged ions." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2006. http://nbn-resolving.de/urn:nbn:de:swb:14-1164063385430-72550.

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Studies of the hyperfine splitting in hydrogen are strongly motivated by the level of accuracy achieved in recent atomic physics experiments, which yield finally model-independent informations about nuclear structure parameters with utmost precision. Considering the current status of the determination of corrections to the hyperfine splitting of the ground state in hydrogen, this thesis provides further improved calculations by taking into account the most recent value for the proton charge radius. Comparing theoretical and experimental data of the hyperfine splitting in hydrogen the proton-si
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23

Whitlock, Shannon, and n/a. "Bose-Einstein condensates on a magnetic film atom chip." Swinburne University of Technology, 2007. http://adt.lib.swin.edu.au./public/adt-VSWT20070613.172308.

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Atom chips are devices used to magnetically trap and manipulate ultracold atoms and Bose-Einstein condensates near a surface. In particular, permanent magnetic film atom chips can allow very tight confinement and intricate magnetic field designs while circumventing technical current noise. Research described in this thesis is focused on the development of a magnetic film atom chip, the production of Bose-Einstein condensates near the film surface, the characterisation of the associated magnetic potentials using rf spectroscopy of ultracold atoms and the realisation of a precision sensor based
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24

Astruc, Jean-Pierre. "Transfert d'électron entre atomes excités et molécules dans une expérience en jets croisés avec fluorescence résolue dans le temps." Paris 13, 1987. http://www.theses.fr/1987PA132020.

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Etude experimentale avec résolution temporelle à l'échelle de la nanoseconde des valeurs absolues des séctions efficaces pour les transferts partiels d'énergie électronique entre Na(4d) et He, Ar, N(2), O(2), N(2)o et SF(6). Développement quantitatif de deux modèles à intermediaire ionique : réseau de multicroisement et diffusion résonnants atome excité-molecule. Emploi de l'approximation d'impact avec correction d'effet de coeur pour la transfert de moment orbital na(4d -> 4f)
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25

Nguyen, Thanh Long. "Study of dipole-dipole interaction between Rydberg atoms : toward quantum simulation with Rydberg atoms." Thesis, Paris 6, 2016. http://www.theses.fr/2016PA066695/document.

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La simulation quantique offre un moyen très prometteur pour comprendre les systèmes quantiques corrélés macroscopiques. De nombreuses plateformes expérimentales sont en cours d'élaboration. Les atomes de Rydberg sont particulièrement intéressants grâce à leur forte interaction dipolaire de cours portée. Dans notre manip, nous préparons et manipulons des ensembles d'atomes de Rydberg excités à partir d'un nuage atomique ultra-froid piégé magnétiquement sur une puce à atome supraconductrice. La dynamique de l'excitation est contrôlée par le processus d'excitation du laser. Le spectre d'énergie d
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26

Camara, Abdoulaye. "Instabilités transverses et auto-organisation dans un nuage d'atomes froids. Gap labelling dans les quasi-cristaux bidimensionnels." Thesis, Nice, 2015. http://www.theses.fr/2015NICE4080/document.

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Dans ce mémoire de thèse, je rapporte les résultats des études réalisées durant ces trois dernières années à l'Institut Non Linéaire de Nice. D'une part, je présente nos expériences de miroir de rétro-action conduisant à la formation spontanée de patterns dans la section transversale d'un faisceau laser (pompe) traversant le centre d'un nuage d'atomes froids de 87Rb et rétro-réfléchi par un miroir placé à une distance du nuage. Dans ces expériences nous discernons trois types de mécanismes de nonlinéarités : la nonlinéarité de spin qui est liée au pompage Zeeman, la nonlinéarité électronique e
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27

Peñafiel, Edwin Eduardo Pedrozo. "Production of a Bose-Einstein condensate of sodium atoms and investigation considering non-linear atom-photon interactions." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/76/76131/tde-26102016-154439/.

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In this work we constructed an experimental system to realize a BEC of sodium atoms. In the first part of the work, we study two atomic sources in order to choose the most suitable for our system. The comparison between a Zeeman slower and a bidimensional magnetooptical trap (2D-MOT) was performed to evaluate the capacity of producing an appropiate flux of atoms in order to load a tridimensional magneto-optical trap (3D-MOT). The experimental results show that the 2D-MOT is as efficient as the Zeeman slower with the advantage of being more compact and easier to operate, and for these reasons w
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28

LaForge, Aaron Christopher. "Three-body dynamics in single ionization of atomic hydrogen by 75 keV proton impact." Diss., Rolla, Mo. : Missouri University of Science and Technology, 2010. http://scholarsmine.mst.edu/thesis/pdf/Laforge_09007dcc80798b26.pdf.

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Thesis (Ph. D.)--Missouri University of Science and Technology, 2010.<br>Vita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed April 21, 2010) Includes bibliographical references (p. 82-87).
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Albus, Alexander. "Mixtures of Bosonic and Fermionic atoms." Phd thesis, Universität Potsdam, 2003. http://opus.kobv.de/ubp/volltexte/2005/98/.

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Ziel der Arbeit war die systematische theoretische Behandlung von Gemischen aus bosonischen und fermionischen Atomen in einem Parameterbereich, der sich zur Beschreibung von aktuellen Experimenten mit ultra-kalten atomaren Gasen eignet.<br /> <br /> Zuerst wurde der Formalismus der Quantenfeldtheorie auf homogene, atomare Boson-Fermion Gemische erweitert, um grundlegende Größen wie Quasiteilchenspektren, die Grundzustandsenergie und daraus abgeleitete Größen über die Molekularfeldtheorie hinaus zu berechnen.<br /> <br /> Unter Zuhilfenahme der dieser Resultate System wurde ein Boson-Fermion Ge
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30

Elayoubi, Mustapha. "Transfert d'atomes d'hydrogène vers la cathode d'un arc réducteur de composition argon-hydrogène /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 1989. http://theses.uqac.ca.

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31

Davies, Hilary Jane. "An optically guided atomic fountain." Thesis, Durham University, 1999. http://etheses.dur.ac.uk/4580/.

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This thesis describes the development of a laser-cooling experiment aimed at efficient transfer of cold atoms over a short distance, for loading into a conservative atom trap. We detail the construction of a 3D magneto-optical trap (MOT) and perform characterisation measurements to optimise the number and temperature of the cold atoms. The atoms are launched vertically in a fountain from the MOT using a 'moving molasses' technique and a red-detuned far-off-resonant laser beam is used to guide them into an UHV chamber. Loading into the guiding beam is optimised with respect to the beam and MOT
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32

Shotter, Martin David. "The development of techniques to prepare and probe at single atom resolution strongly interacting quantum systems ot uitracold atoms." Thesis, University of Oxford, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.526117.

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33

Abdussalam, Wildan. "Dynamics of Rydberg atom lattices in the presence of noise and dissipation." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-227485.

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The work presented in this dissertation concerns dynamics of Rydberg atom lattices in the presence of noise and dissipation. Rydberg atoms possess a number of exaggerated properties, such as a strong van der Waals interaction. The interplay of that interaction, coherent driving and decoherence leads to intriguing non-equilibrium phenomena. Here, we study the non-equilibrium physics of driven atom lattices in the presence of decoherence caused by either laser phase noise or strong decay. In the first case, we compare between global and local noise and explore their effect on the number of exc
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34

Lefèvre, Grégoire. "Développement d’un interféromètre atomique en cavité pour le projet MIGA." Thesis, Bordeaux, 2019. http://www.theses.fr/2019BORD0063/document.

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Après plusieurs décennies de développement, l'interférométrie atomique est devenue un outil extrêmement performant pour mesurer des effets inertiels, tels que des accélérations et des rotations. De telles techniques sont maintenant envisagées pour une future génération de détecteurs d'ondes gravitationnelles afin de pousser les limites de l'état de l'art des détecteurs actuels. L'instrument MIGA (Matter-wave laser Interferometer Gravitation Antenna) couplera interférométrie atomique et optique pour étudier des perturbations du champ gravitationnel à basse fréquence (Hz et sub-Hz). Il consister
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35

Töpfer, Kai [Verfasser]. "Understanding the Interaction of CO and O2 with MgO(001) and Supported Metal Atoms: Towards Single-Atom Catalysis / Kai Töpfer." Berlin : Freie Universität Berlin, 2020. http://d-nb.info/1206183314/34.

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36

Hofmann, Julian. "Heralded atom-atom entanglement." Diss., Ludwig-Maximilians-Universität München, 2014. http://nbn-resolving.de/urn:nbn:de:bvb:19-164847.

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37

Radouani, Abdelhak. "Réaction des atomes métastables de gaz rares (Ar*(3p2,0), Kr*(3p2) et Xe*(3p2)) avec le silane." Grenoble 1, 1986. http://www.theses.fr/1986GRE10143.

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Etude des produits de reactions par spectrometrie d'emission et de si a l'etat fondamental pas spectrometrie d'absorption. Absence d'emission dans le cas de xe et observation de la formation de si dans differents etats electroniques excites et de sih dans son 1er etat electronique excite, pour lesquels on determine les coefficients de chimiluminescence. Avantages de la technique de post-decharge en ecoulement. Emploi d'un modele statistique pour interpreter l'evolution des populations des niveaux rotationnels de sih**(*) par collision avec ar
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38

Reznychenko, Bogdan. "Optique quantique des atomes unidimensionnels, avec application aux interfaces spinphoton." Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAY079/document.

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Les phénomènes quantiques ouvrent des possibilités nouvelles et révolutionnaires dans les domaines du calcul et de la cryptographie. Il est attendue, que des problèmes impossibles à résoudre avec des moyens classiques, peuvent être résolus par des ordinateurs quantiques, et la communication devient absolument sécurisée si elle est encodée dans un état de système quantique – un bit quantique. Un effort important a récemment été consacré à la recherche sur le transfert déterministe d’information entre photons et atomes, fonctionnant comme des bits quantiques volants et stationnaires respectiveme
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39

Lemoine, Didier. "Etude quantique des transferts inélastiques dans les collisions atome-atome et atome-molécule." Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb37615189n.

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40

Lemoine, Didier. "Étude quantique des transferts inélastiques dans les collisions atome-atome et atome-molécule." Lille 1, 1988. http://www.theses.fr/1988LIL10014.

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1°. Étude des transferts entre composantes de structure fine d'un atome alcalin dans un état électronique doublet p induits par collision avec un atome sans structure ; détermination des sections efficaces et description totalement adiabatique de la dynamique de collision, mettant en évidence un nouveau mécanisme de couplage. 2°. Étude des transferts rotationnels dans N(2) (état fondamental) et Li(2) (premier état excité) induits par collision avec un atome de gaz rare ; exploration du domaine de validité des deux approximations couramment utilisées ; étude de la distribution angulaire de la d
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41

Götz, Simone Andrea [Verfasser], and Matthias [Akademischer Betreuer] Weidemüller. "A high density target of ultracold atoms and momentum resolved measurements of ion-atom collisions / Simone Andrea Götz ; Betreuer: Matthias Weidemüller." Heidelberg : Universitätsbibliothek Heidelberg, 2012. http://d-nb.info/1179784596/34.

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42

Pasquini, Michael. "Computer quantistici a ioni intrappolati." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/24678/.

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L'obiettivo di questo elaborato è di dare una descrizione generale del funzionamento di un computer quantistico a ioni intrappolati, dal confinamento degli ioni in trappole unidimensionali fino all’implementazione delle porte logiche. Partendo dalla descrizione della trappola ionica di Paul che confina gli ioni tramite un potenziale di tipo armonico, si è poi descritto in che modo è possibile modificare lo stato interno degli ioni tramite l’interazione con il campo elettromagnetico generato da un laser esterno Si è esaminato nel dettaglio quali sono le principali tipologie di gate a sin
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43

Duque, Humberto Vargas. "Implantação de um analisador de baixas energias de elétrons com resolução angular em um espectrômetro de perda de energia de elétrons." Universidade Federal de Juiz de Fora (UFJF), 2012. https://repositorio.ufjf.br/jspui/handle/ufjf/6122.

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Submitted by Geandra Rodrigues (geandrar@gmail.com) on 2018-01-10T14:00:21Z No. of bitstreams: 1 humbertovargasduque (1).pdf: 2897920 bytes, checksum: 904a8ff36edd0079149dfe6e3be69aed (MD5)<br>Rejected by Adriana Oliveira (adriana.oliveira@ufjf.edu.br), reason: Favor corrigir: Membro da banca: Filho, Jayr de Amorim on 2018-01-23T11:49:04Z (GMT)<br>Submitted by Geandra Rodrigues (geandrar@gmail.com) on 2018-01-23T13:12:19Z No. of bitstreams: 1 humbertovargasduque (1).pdf: 2897920 bytes, checksum: 904a8ff36edd0079149dfe6e3be69aed (MD5)<br>Rejected by Adriana Oliveira (adriana.oliveira@ufjf.edu
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Scheunemann, Rainer. "Lichtgebundene Atome." Diss., lmu, 2001. http://nbn-resolving.de/urn:nbn:de:bvb:19-4478.

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45

Haffad, Abdelkrim. "Angular momentum transfer in electron-atom and atom-atom collisional ionization." Diss., Georgia Institute of Technology, 1991. http://hdl.handle.net/1853/29826.

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46

Sun, Bo. "Theoretical studies of atom-atom, atom-photon and photon-photon entanglement." Diss., Available online, Georgia Institute of Technology, 2006, 2006. http://etd.gatech.edu/theses/available/etd-10272006-091504/.

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Thesis (Ph. D.)--Physics, Georgia Institute of Technology, 2007.<br>You Li, Committee Chair ; Citrin David, Committee Member ; Kuzmich Alex, Committee Member ; Fox Ronald, Committee Member ; Chapman Michael, Committee Member.
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47

Pax, Paul Henry 1958. "Few-atom effects in atom optics." Diss., The University of Arizona, 1998. http://hdl.handle.net/10150/288794.

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Despite the many advances and achievements in the fields of atom optics and atom cooling, there remains a wealth of dynamical detail to be filled in. While the main features of the important phenomena of atomic cooling, trapping and manipulation by electromagnetic fields are well understood, there are interesting subsidiary effects that are worth our attention. An example, which we discuss in Ch. 5 is the discovery that atomic diffusion in optical lattices may not follow the normal diffusion equation. The work reported in this dissertation represents an investigation into possible few-body eff
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48

SAGE, FRANCOISE. "Pompage optique du niveau metastable **(3)p : :(o) de la premiere configuration excitee des isotopes impairs des gaz rares." Caen, 1985. http://www.theses.fr/1985CAEN2039.

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Etude experimentale de ce pompage optique sur les isotopes **(21)ne, **(83)kr, **(129)xe et **(131)xe afin de mesurer le facteur de lande g(**(3)po) par des experiences de resonance magnetique en phase vapeur (**(21)ne) ou son faisceau atomique, les atomes etant portes dans l'etat metastable a l'aide d'une decharge haute frequence et pompes optiquement par un laser a colorant continu accordable, avec une precision superieure a celle des calculs a partir de la structure hyperfine
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49

Hilico, Adèle. "Capture de forces à atomes piégés dans un réseau optique : caractérisation des performances." Thesis, Paris, Ecole normale supérieure, 2014. http://www.theses.fr/2014ENSU0007/document.

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Ce mémoire présente la réalisation d'un dispositif expérimental de deuxième génération pour le projet FORCA-G (FORce de CAsimir et Gravitation à courte distance). L'objectif de ce projet est la mesure des interactions à faible distance entre un atome et une surface massive. La mesure de force est réalisée à l'aide d'interféromètres atomiques utilisant des atomes confinés dans un réseau optique 1D vertical basé sur le déplacement des atomes de puits en puits. La dégénérescence des niveaux d'énergies des atomes dans les puits du réseau est levée par la force que l'on cherche à mesurer. Des trans
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50

Blockley, Craig Andrew. "Quantum interactions of light and atoms: squeezing of light by atoms and cooling of atoms by light." Thesis, University of Auckland, 1993. http://hdl.handle.net/2292/1966.

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Light and atoms couple together via the electromagnetic interaction. The simplest form of this interaction is the electric dipole interaction, and in its quantised form it provides a useful starting point for the investigation of quantum effects in optics. Two examples of quantum noise manipulation of the light field due to interaction with atoms will be presented, as well as an analysis of a simple model for laser cooling of trapped atoms. The first example of quantum noise manipulation is the investigation of a quantum non-demolition measurement scheme based on a three-level atomic system in
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