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Relevant bibliographies by topics / Magneto-optical traps; Cold atom traps / Dissertations / Theses

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Dissertations / Theses on the topic 'Magneto-optical traps; Cold atom traps'

Author: Grafiati

Published: 4 June 2021

Last updated: 9 February 2022

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1

Cooper, Catherine J. "Laser cooling and trapping of atoms." Thesis, University of Oxford, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.308685.

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2

Ivanov, Vladyslav Victorovych. "Cold atoms modified radiative properties and evaporative cooling from optical traps /." [S.l. : Amsterdam : s.n.] ; Universiteit van Amsterdam [Host], 2007. http://dare.uva.nl/document/47332.

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3

Bruce, Graham D. "Alternative techniques for the production and manipulation of ultracold atoms." Thesis, University of St Andrews, 2012. http://hdl.handle.net/10023/2617.

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This Thesis contains details of the construction and characterisation of a compact apparatus for the cooling of ultracold atoms to quantum degeneracy, and their manipulation in flexible holographic optical traps. We have designed and built two iterations of this apparatus. The first version consists of a stainless steel single-cell vacuum chamber, in which we confine ⁸⁷Rb and ⁶Li or ⁷Li in a Magneto-Optical Trap. We characterise the alternative methods of pulsed atomic dispenser and Light Induced Atomic Desorption (LIAD) to rapidly vary the background pressure in the vacuum chamber with the vi

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4

Clements, Ethan Robert. "CHARACTERIZATION OF OPTICAL LATTICES USING PUMP-PROBESPECTROSCOPY AND FLUORESCENCE IMAGING." Miami University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=miami1470323164.

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5

Pollock, Samuel. "Integrated magneto-optical traps for atom chips." Thesis, Imperial College London, 2010. http://hdl.handle.net/10044/1/11271.

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6

Muckley, Eric S. "Constructing a magneto-optical trap for cold atom trapping /." Click here to view, 2009. http://digitalcommons.calpoly.edu/physsp/2.

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Thesis (B.S.)--California Polytechnic State University, 2009.<br>Project advisor: Katharina Gillen. Title from PDF title page; viewed on Jan. 14, 2010. Includes bibliographical references. Also available on microfiche.

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7

Van, Dongen Janelle. "Simultaneous cooling and trapping of 6Li and 85/87Rb." Thesis, University of British Columbia, 2007. http://hdl.handle.net/2429/351.

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This thesis provides a summary of the laser system constructed in the Quantum Degenerate Gases Laboratory for laser cooling and trapping of 85/87Rband 6Li as well as of experiments that have been pursued in our lab to date. The first chapter provides an overview of the experimental focus of the QDG lab. The second and third chapters provide the fundamental theory behind laser cooling and trapping. The fourth chapter provides details of the laser system. The fifth chapter describes an experiment performed on the subject of dual-injection, performed in collaboration with Dr. James Booth of the B

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8

Ladouceur, Keith. "Experimental advances toward a compact dual-species laser cooling apparatus." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/2508.

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This thesis describes the advances made towards a dual-species magneto-optical trap (MOT) of Li and Rb for use in photoassociation spectroscopy, Feshbach resonance studies, and, as long-term aspirations, the formation of ultracold heteronuclear polar molecules. The initial discussion will focus on a brief theoretical overview of laser cooling and trapping and the production of ultracold molecules from a cold atom source. Subsequently, details of the experimental system, including those pertaining to the required laser light, the vacuum chamber, and the computer control system will be presented

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9

Morsch, Oliver. "Optical lattices for ultra-cold atoms." Thesis, University of Oxford, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.301174.

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10

Deb, Amita. "Theoretical and experimental studies on ultra-cold atoms in optical traps." Thesis, University of Oxford, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.600174.

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This thesis describes a number of theoretical and experimental studies on the production, manipulation and detection of ultra-cold atoms in arrays of optical traps, i. e. optical lattices for applications such as direct quantum simulation of many-body systems and quantum information processing. A method of deterministically preparing a single atom in each site of an optical lattice is explored and the parameter regime that would be required to implement this protocol in experiments is investigated. A novel method of state-selective spatial transfer of atoms between neighbouring sites of a latt

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11

Milori, Debora Marcondes Bastos Pereira. "Caracterização de uma armadilha magneto-optica para átomos de sódio em célula de vapor." Universidade de São Paulo, 1994. http://www.teses.usp.br/teses/disponiveis/76/76131/tde-30042009-090336/.

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Dentro as técnicas de controle do movimento atômico utilizando pressão de radiação, aprisionamento tem merecido maior destaque por produzir amostras de átomos mais frios (temperaturas da ordem de &#956K), com altas densidades e confinadas em pequenas regiões do espaço. Devido a essas motivações, tem sido grande o esforço para desenvolver e caracterizar estas armadilhas atômicas. Uma das mais eficientes armadilhas de átomos neutros construídas até agora é a armadilha magneto-óptica. O átomo uma vez capturado por este tipo de armadilha passa por um intenso processo de desaceleração via efeito Do

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12

Souther, Nathan Jon. "Light Shift Measurements of Cold Rubidium Atoms using Raman Pump-Probe Spectroscopy." Miami University / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=miami1250622906.

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13

Lytle, Christian, and Christian Lytle. "Spectroscopy of Neutral Mercury in a Magneto-Optical Trap Based on a Novel Ytterbium Fiber-Amplified Cooling Laser Source." Diss., The University of Arizona, 2016. http://hdl.handle.net/10150/621471.

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In this dissertation I present experimental results obtained on the mercury optical clock project in the research group of Jason Jones at the University of Arizona. The project began in 2008 with the purpose of investigating the feasibility of neutral mercury as an optical clock species. The first series of investigations involved building the essential apparatus and scanning the doppler-broadened 6¹S₀ - 6³P₀ clock transition in ¹⁹⁹Hg. Here I present significant modifications to the cooling and trapping laser, improvements to the spectroscopy laser linewidth, and attempts to measure the 2-phot

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14

Salas, Andres David Rodriguez. "Geração de uma armadilha magneto-óptica de estrôncio 88." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/76/76132/tde-05112012-155605/.

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Neste trabalho é apresentada a construção da montagem de um sistema experimental para resfriar átomos de estrôncio. A construção do sistema está focada no estudo do espalhamento coletivo em nuvens atômicas frias e ultrafrias por meio da teoria de Mie. O estrôncio é um elemento que conta com dois estágios de resfriamento, o primeiro utilizando a transição forte entre estados singletos ¹S₀-¹P ₁ de Γ = (2 π)32 MHz, e o segundo com uma transição fraca entre estados singleto e tripleto ¹S₀-³P₁ de Γ = (2 π)7,5 MHz. O objetivo deste trabal

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15

Silva, Ilde Guedes da. "Estruturas espaciais de átomos de Na em armadilha magneto-óptica." Universidade de São Paulo, 1994. http://www.teses.usp.br/teses/disponiveis/54/54131/tde-21022014-101849/.

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Neste trabalho demonstramos o confinamento de átomos de sódio usando a armadilha magneto-óptica, onde os átomos foram capturados diretamente a partir da distribuição inicial do vapor atômico a uma temperatura ambiente, contido em uma célula fechada. Observamos além da nuvem de átomos aprisionados, estruturas circulares em forma de anek, que surgem devido ao desalinhamento introduzido nos feixes de aprisionamento. Estudamos o comportamento do raio do anel em função de vários parâmetros utilizados na armadilha magneto-óptica como por exemplo: gradiente de campo magnético, intensidade do laser, d

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16

Pereira, Andrea Antunes. "Estudo de colisões inelásticas heteronucleares no sistema rubídio(Rb)/césio(Cs) em regimes de baixas temperaturas." Universidade de São Paulo, 1999. http://www.teses.usp.br/teses/disponiveis/76/76132/tde-09092008-123340/.

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Armadilhamento duplo de átomos neutros constitui um dos avanços mais recentes no estudo de colisões frias. Obtivemos experimentalmente as taxas de perda devido a interação de espécies alcalinas mistas (Cs/Rb). Utilizamos uma armadilha magneto-óptica mista operando com feixes de alta intensidade permitindo o resfriamento e confinamento das amostras com sucesso. Esse trabalho apresenta-se de forma relevante pois corresponde a primeira etapa para o estudo do processo de formação de moléculas frias heteronucleares. Uma comparação entre duas técnicas de monitoramento dos processos de carga de átomo

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17

Peñafiel, Edwin Eduardo Pedrozo. "Absorção cooperativa de dois fótons em átomos frios." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/76/76131/tde-04102011-155751/.

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Neste trabalho estudamos a absorção cooperativa de dois fótons em processos de colisão entre átomos frios de sódio aprisionados. Efeitos não-lineares exigem amostras de alta densidade para ser observados. Redesenhamos nosso sistema experimental para conseguir amostras de 1012 átomos/cm3. As principais alterações foram a construção de um desacelerador Zeeman em configuração spin-flip, a implementação de bombeamento diferencial entre o forno e a câmara principal, assim como redesenhar o forno. A fim de compreender e melhorar os processos de medição utilizamos a técnica de fotoionização nos esta

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18

Magalhães, Kilvia Mayre Farias. "Medida do tempo de vida de estados de Rydberg em átomos frios de 85 Rb." Universidade de São Paulo, 1999. http://www.teses.usp.br/teses/disponiveis/76/76132/tde-21112007-100629/.

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Neste trabalho apresentamos os primeiros resultados sobre medida do tempo de vida de estados de Rydberg utilizando átomos frios confinados em uma armadilha magneto-optica de 85Rb. Medidas de tempo de vida de estados altamente excitados são importantes para o teste de teorias modernas sobre interação átomo-vácuo; desta forma medidas precisas são necessárias. A utilização de átomos frios apresenta várias vantagens quando comparadas com técnicas convencionais. Entre elas podemos citar a possibilidade de observação do sistema atômico por longos períodos (>100 µs), e o controle da densidade de

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19

Fritsch, Amilson Rogelso. "Montagem e caracterização de uma armadilha magneto-óptica de rubídio." Universidade do Estado de Santa Catarina, 2011. http://tede.udesc.br/handle/handle/2008.

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Made available in DSpace on 2016-12-12T20:15:54Z (GMT). No. of bitstreams: 1 introducao.pdf: 91836 bytes, checksum: cb92c1e5e08cf2686a55fb3fdfcba785 (MD5) Previous issue date: 2011-07-20<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>In this work we present the building and characterization of a Magneto-Optical Trap (from now on named MOT) for Rubidium atoms. We perform experiments for studying the e¤ect of a broadband light over trapped atoms. In order to carry out this study we used a incandescent lamp which is broad in the wavelength spectrum. We observed in a MOT, with

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20

Magalhães, Kilvia Mayre Farias. "Obtenção da degenerescência quântica em sódio aprisionado." Universidade de São Paulo, 2004. http://www.teses.usp.br/teses/disponiveis/76/76132/tde-24012008-083710/.

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Usando a técnica de resfriamento evaporativo para átomos comprimidos numa armadilha magnética tipo QUIC, implementamos experimentos para observar Condensação de Bose-Einstein de átomos de sódio. Nessa armadilha magnética temos átomos advindos de uma armadilha magneto-óptica, a qual é carregada por um feixe desacelerado como etapa de pré-resfriamento. Nossas medidas foram baseadas em imagens de absorção fora de ressonância de um feixe de prova pela amostra atômica. Essas imagens foram feitas in situ, ou seja, na presença do campo da armadilha magnética, pelo fato do número de átomos ser baixo e

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21

Kim, Soo Y. "Cold single atoms for cavity QED experiments." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/26581.

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Thesis (Ph.D)--Physics, Georgia Institute of Technology, 2009.<br>Committee Chair: Chapman, Michael; Committee Member: Citrin, David; Committee Member: Kennedy, T. A. Brian; Committee Member: Kuzmich, Alexander; Committee Member: Raman, Chandra. Part of the SMARTech Electronic Thesis and Dissertation Collection.

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22

Corrêa, Thiago Reginaldo. "Implicações do uso de campos magnéticos oscilantes em um mot de rubídio." Universidade do Estado de Santa Catarina, 2012. http://tede.udesc.br/handle/handle/1969.

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Made available in DSpace on 2016-12-12T20:15:48Z (GMT). No. of bitstreams: 1 capa ate a Introducao.pdf: 95782 bytes, checksum: 9c1b33c935822f8b7b9fab4eec59cfc6 (MD5) Previous issue date: 2012-03-08<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>This work presents a study about infuences that a quadripolar magnetic field periodically time dependent, can promote in a magneto-optical trap (MOT). The intention reflects the interest in finding an oscillating field configuration that enables the capture and provide benefits if compared to the typical process of trapping. In many

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23

Erickson, Christopher Joseph. "Development of a Strontium-87 Ion Interferometer." BYU ScholarsArchive, 2011. https://scholarsarchive.byu.edu/etd/2750.

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I present the construction of a low-velocity intense source (LVIS) of laser-cooled neutral strontium using permanent ring magnets. The LVIS consists of a magneto-optical trap from which cold strontium is extracted in a well-collimated beam. I also present the development and implementation of a full suite of low-noise, high-bandwidth laser control electronics including a microcontroller unit. This microcontroller remotely controls and monitors the current driver, temperature controller, and PID lock circuit for each diode laser simultaneously. The current driver output is accurate to within 2

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24

Kondo, Jorge Douglas Massayuki. "Ressonâncias moleculares em estados nP de átomos de Rydberg frios." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/76/76131/tde-18112010-145903/.

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Neste trabalho estudamos a interação entre átomos de Rydberg no estado nP e sua dependência com o campo elétrico dc. Estes estados apresentam ressonâncias Föster para um número quântico principal n menor que 37. Nestes processos de ressonância um par atômico no estado nP muda para um par nS+(n+1)S. Realizamos dois experimentos de evolução temporal para 32≤n≤36. No primeiro investigamos a dependência da taxa de transferência de população NnS em função do número quântico principal n. E no segundo estudamos a transferência de população para um estado fixo de n=33 em função do campo elétrico

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25

Alloschery, Olivier. "Manipulation d’atomes froids par des puces atomiques optiques." Toulouse 3, 2007. http://www.theses.fr/2007TOU30052.

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Ce mémoire présente le confinement d'atomes froids dans des pièges dipolaires mis en forme par des micro-structures gravées à la surface d'un miroir, à la manière de lentilles de Fresnel. Dans la première partie, nous détaillons le dispositif expérimental que nous avons mis en place pour former un piège magnéto-optique à miroir, et donnons ses caractéristiques. Dans la deuxième partie, nous décrivons les moyens théoriques, numériques et expérimentaux que nous avons utilisés pour dessiner et caractériser différents motifs de lentilles. Nous étudions alors le chargement, la température et la dur

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26

Hoendervanger, Lynn. "A New Metastable Helium Machine : An Investigation into the Attributes of Trapping, Cooling and Detecting Metastable Helium." Thesis, Palaiseau, Institut d'optique théorique et appliquée, 2014. http://www.theses.fr/2014IOTA0006/document.

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Cette thèse décrit le travail accompli au cours des trois dernières années sur la nouvelle expérience d’Hélium métastable de l'Institut d'Optique à Palaiseau.Le premier chapitre décrit une étude visant à améliorer à la fois l'efficacité et la précision du système de détection par galettes à micro-canaux (MCP). Nous avons fait des mesures avec des galettes recouvertes d'une couche d'or sur la face avant, obtenant un accroissement de l'efficacité de détection mais également une réduction de la précision. L'ajout d'une tension intermédiaires entre les deux galettes empilées a au contraire amélior

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27

Khalili, Guyve. "Réalisation d'une source d'électrons par ionisation d'un jet d'atomes de césium refroidis par laser." Thesis, Paris 11, 2015. http://www.theses.fr/2015PA112103/document.

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Les faisceaux d’électrons et d’ions sont au cœur de nombreuses techniques instrumentales servant à explorer, analyser et agir sur des matériaux à l’échelle du micromètre au nanomètre (Microscopie électronique, spectrométrie d’électrons, techniques de « FIB »). Les limites de résolution spatiale et énergétique de ces techniques dépendent en grande partie des propriétés des sources qu’elles utilisent et en particulier de leur température de fonctionnement. De fait, depuis plus de 10 ans, le potentiel des atomes froids ionisés comme nouveau type de source d’électrons ou d’ions est intensivement e

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28

Braga, Helena Carolina. "O operador de Wigner aplicado a colisões de mudança de estrutura fina entre átomos alcalinos no regime frio." Universidade de São Paulo, 2002. http://www.teses.usp.br/teses/disponiveis/76/76131/tde-09042008-091650/.

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Neste trabalho abordamos os processos de perdas colisionais por mudança de estrutura fina e por escape radiativo. Estes processos são importantes por serem os principais fatores limitantes da densidade e da permanência de átomos confinados em armadilhas magneto-ópticas. A utilização do formalismo de Wigner nos possibilitou tratar a dinâmica dos graus de liberdade internos do sistema de forma puramente quântica, enquanto tratamos os graus de liberdade translacionais de maneira semiclássica. Com este formalismo deduzimos equações inéditas para uma colisão unidimensional e desenvolvemos um algori

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29

Raskop, Jérémy. "Quantum optics with single collective excitations of nanofiber-trapped arrays of atoms." Thesis, Sorbonne université, 2020. http://www.theses.fr/2020SORUS005.

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Cette thèse traite des interactions entre des photons guidés par une nanofibre optique et des réseaux d'atomes piégés. Notre montage expérimental consiste en un piège dipolaire bicolore compensé, généré dans le champ évanescent d'une nanofibre et permettent de piéger des atomes de césium de part et d'autre de la fibre. Une épaisseur optique de plus de 130 est obtenue avec quelques milliers d'atomes seulement. Nous démontrons la capacité de préparer les atomes piégés dans un sous-niveau Zeeman unique, bien qu'avec une efficacité limitée. Cette étape est importante pour la réalisation de mémoire

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Métivier, David. "Modèles cinétiques, de Kuramoto à Vlasov : bifurcations et analyse expérimentale d'un piège magnéto-optique." Thesis, Université Côte d'Azur (ComUE), 2017. http://www.theses.fr/2017AZUR4074/document.

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Les systèmes en interaction à longue portée sont connus pour avoir des propriétés statistiques et dynamiques particulières. Pour décrire leur évolution dynamique, on utilise des équations cinétiques décrivant leur densité dans l'espace des phases. Ce manuscrit est divisé en deux parties indépendantes. La première traite de notre collaboration avec une équipe expérimentale sur un Piège Magnéto-Optique. Ce dispositif à grand nombre d'atomes présente des interactions coulombiennes effectives provenant de la rediffusion des photons. Nous avons proposé des tests expérimentaux pour mettre en évidenc

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31

Xiao, Yanyang. "Magneto-optical trap and its application to ultra-cold atom collision studies." Thesis, 1994. http://hdl.handle.net/1911/13918.

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We have successfully trapped $\sp7$Li in a vapor cell magneto-optical trap (MOT). The trap is studied in detail and the parameters are measured from the experiment. The trapping mechanism has been understood in terms of the radiation force and a simple one dimensional model is used in interpreting and predicting the experimental results. The cold-cold atom collision rate coefficient is measured in a beam MOT. The two collision mechanisms, fine structure changing and radiative escape, are discussed in a molecular picture. One of the channels, the fine structure changing channel, can be turned o

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32

Chen-HungRen and 陳宏任. "Electromagnetically Induced Transparency of the Cold Cesium Atoms in a Magneto-Optical Trap." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/29784995468297834580.

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碩士<br>國立成功大學<br>物理學系碩博士班<br>101<br>We construct the cold cesium atoms, which number is 5.62×108 atoms and density is 3.03×1011 atoms/cm3, by magneto-optical trap (MOT). The loading time is 761.81 ms. We applied the ladder-type electromagnetically induced transparency (EIT) in the cold cesium atoms. The three-level system is coupled by the probe field coupling the states｜62S1/2,F=4＞ and ｜62P3/2,F'=5＞ , and the coupling field coupling the states｜62P3/2,F'=5＞ and ｜82S1/2,F=4＞ .In our experiment, we lock the probe laser frequency from｜62S1/2,F=4＞ to ｜62P3/2,F'=5＞ and scan the coupling laser fre

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33

Lee, Yi-Chi, and 李益志. "Study of the Transportation of Cold Atoms between the Double Magneto-Optical Trap." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/54604193473640416134.

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碩士<br>國立清華大學<br>物理學系<br>93<br>To realize Bose-Einstein condensation (BEC) ,we decide to build up a new system called “ Double Magneto-Optical Trap”(DMOT)in our lab. This is different from the old system (single Magneto-Optical Trap). In DMOT system, we use a chamber as the first MOT, and second MOT is a cell made with Pyrex .We trap the atoms in the first MOT，the number of atoms is 1.3 x109.After trapping the atoms, a laser beam named ”Push beam” pushes atoms from first MOT to second MOT. The frequency of the push beam is on resonance(|5S1/2,F=2>�逖5P3/2,F’=3>).The second MOT is collecting the

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Xiao, Hau-Yl, and 蕭豪毅. "Trapping Cold Atoms with an Optical Dipole Trap." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/14163296521974752188.

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35

Lin, Li-Chieh, and 林豊傑. "Optical Dipole Trap of Ultra-Cold Rubidium Atoms." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/26400870264276979758.

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Hung, Weilun, and 洪偉倫. "Studies of loading and storage of cold atoms in an optical dipole trap." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/80470018929241589603.

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博士<br>國立清華大學<br>物理系<br>102<br>This thesis focuses on transferring cold atoms into an optical dipole trap (ODT). Optical density as well as number density of the cold atoms confined in the ODT can be achieved to a sufficiently high level that is suitable for single-photon nonlinear optics experiments. We studied the processes of loading cold atoms into the ODT from a temporal dark magnetic-optical trap (MOT), a spatial dark MOT, and a time-averaged orbiting potential (TOP) magnetic trap. We further investigated how to prolong the storage time of the atoms captured in the ODT. A rapid loss of th

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Rathod, Ketan D. "Continuous Beam of Laser-Cooled Ytterbium Atoms for Precision Measurements." Thesis, 2014. http://hdl.handle.net/2005/2781.

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What if an elementary particle such as an electron had an intrinsic electric dipole moment (EDM)? Existence of such an EDM would be an indication of time-reversal symmetry violation in the laws of Physics. The Standard model of Physics is considered incomplete, and theories that go beyond the standard model predict existence of such EDM’s within experimental reach. Experiments that search for their existence serve as a test bed for these theories. Use of laser-cooled Yb atoms launched in a fountain for EDM search has been proposed earlier. This thesis describes the main experimental work on ge

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Wu, Feng-chuan, and 吳豐全. "Effect of the Two-Photon Raman Transition on the Storage Time of Cold Atoms in an Optical Dipole Trap." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/tc85cv.

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Huang, Pan-Pan, and 黃盼盼. "Characterization of cold atoms captured in an optical dipole trap and study of their interaction with a probe laser." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/85772064979083502470.

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Abstract:

碩士<br>國立交通大學<br>光電工程研究所<br>101<br>To maximize the optical density (OD) of cold 87Rb atoms in an optical dipole trap (ODT) for future single-photon experiments, we investigated the methods of loading the atoms into the ODT from a time-averaged orbiting potential (TOP) and from a dark magnetic-optical trap with and without the magnetic compression (abbreviated as dark-CMOT and dark-MOT, respectively). The atomic temperature and density in the TOP 3A (the current through the TOP coils) were 57.5 K and 1.2×1012 cm-3; those in the dark-CMOT or dark-MOT were 300 K and 3.8×1010 cm-3. The ODT was re

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