Relevant bibliographies by topics / 2D magneto optical trap

Academic literature on the topic '2D magneto optical trap'

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Published: 14 March 2023

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Journal articles on the topic "2D magneto optical trap"

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Xie, Weibin, Qing Wang, Xuan He, Shengwei Fang, Zhichao Yuan, Xianghui Qi, and Xuzong Chen. "A cold cesium beam source based on a two-dimensional magneto-optical trap." AIP Advances 12, no. 7 (July 1, 2022): 075124. http://dx.doi.org/10.1063/5.0099415.

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A beam source is proposed for the production of an intense cold cesium atomic beam that can be used in cesium beam atomic clocks. The source is based on a two-dimensional magneto-optical trap (2D-MOT), but introduces hollow cooling and pushing lights in the axial direction to create a 2D+-MOT, which separates the cooling and pushing functions while the low-power pushing light pushes atoms out to form a cold atomic beam. This cold cesium atomic beam source reduces the light shift due to leakage light and retains longitudinal cooling to increase the flux of the cold atomic beam compared with that of the conventional 2D+-MOT scheme. The specifics of the design are investigated, the atomic velocity and beam flux are calculated, and the results are experimentally verified. The results demonstrate that when the power of the pushing light is 180 µW and when its frequency resonates with the 4 → 5′ transition of the Cs D2 line, the most probable longitudinal velocity of the outgoing cold atomic beam, the width of velocity distribution, and the atomic beam flux are 19.38 m/s, 8.1 m/s, and 1.7 × 1010 atoms/s, respectively.
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Dörscher, Sören, Alexander Thobe, Bastian Hundt, André Kochanke, Rodolphe Le Targat, Patrick Windpassinger, Christoph Becker, and Klaus Sengstock. "Creation of quantum-degenerate gases of ytterbium in a compact 2D-/3D-magneto-optical trap setup." Review of Scientific Instruments 84, no. 4 (April 2013): 043109. http://dx.doi.org/10.1063/1.4802682.

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Berthoud, P., A. Joyet, G. Dudle, N. Sagna, and P. Thomann. "A continuous beam of slow, cold cesium atoms magnetically extracted from a 2D magneto-optical trap." Europhysics Letters (EPL) 41, no. 2 (January 15, 1998): 141–46. http://dx.doi.org/10.1209/epl/i1998-00122-9.

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Zhang, Bao Wu, Nicolò Porfido, Francesco Tantussi, Francesco Fuso, Yan Ma, Wen Tao Zhang, and Tong Bao Li. "Simulation of Two-Dimensional Transverse Laser Cooling of Cesium Beam from Pyramidal Magneto-Optical Trap Atom Funnel." Advanced Materials Research 189-193 (February 2011): 3736–39. http://dx.doi.org/10.4028/www.scientific.net/amr.189-193.3736.

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Simulation of two-dimensional (2D) transverse laser cooling of Cs atomic beam from pyramidal magneto-optical trap atom funnel (PMOTAF) conceived for atom lithography is presented. The results show that both the minimum full width at half maximum (FWHM) and the maximum peak value of the spatial profile of the atomic beam occur at the frequency detuning of optical molasses equals to -0.5 Г. Moreover, for each frequency detuning, an increase in the intensity of the optical molasses leads to smaller FWHM and higher peak value. The not negligible role of gravity on the atomic beam of sub-thermal longitudinal velocity along the horizontal direction is that every atomic trajectory possesses a parabolic motion either before or after laser cooling which leads to a noticeable displacement of the peak value at the observation plane with respect to the starting point.
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Carrat, Vincent, Citlali Cabrera-Gutiérrez, Marion Jacquey, José W. Tabosa, Bruno Viaris de Lesegno, and Laurence Pruvost. "Long-distance channeling of cold atoms exiting a 2D magneto-optical trap by a Laguerre–Gaussian laser beam." Optics Letters 39, no. 3 (January 31, 2014): 719. http://dx.doi.org/10.1364/ol.39.000719.

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Chauhan, Vikas Singh, Dixith Manchaiah, Sumit Bhushan, Rohit Kumar, and Raghavan K. Easwaran. "Theoretical design of quantum memory unit for under water quantum communication using electromagnetically induced transparency protocol in ultracold 87Rb atoms." International Journal of Quantum Information 18, no. 05 (August 2020): 2050027. http://dx.doi.org/10.1142/s0219749920500276.

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In this paper, we present a theoretical proposal to realize Quantum Memory (QM) for storage of blue light pulses (420 nm) using Electromagnetically Induced Transparency (EIT). Three-level lambda-type EIT configuration system is solved in a fully quantum mechanical approach. Storing blue light has the potential application in the field of underwater quantum communication as it experiences less attenuation inside the sea water. Our model works by exciting the relevant transitions of [Formula: see text]Rb atoms using a three-level lambda-type configuration in a Two-Dimensional Magneto-Optical Trap (2D MOT) with an optical cavity inside it. We have estimated Optical Depth inside the cavity (ODc) of [Formula: see text], group velocity ([Formula: see text]) [Formula: see text][Formula: see text]ms[Formula: see text], Delay Bandwidth Product(DBP) of 23 and maximum storage efficiency as [Formula: see text] in our system.
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Li, Jianing, Kelvin Lim, Swarup Das, Thomas Zanon-Willette, Chen-Hao Feng, Paul Robert, Andrea Bertoldi, et al. "Bi-color atomic beam slower and magnetic field compensation for ultracold gases." AVS Quantum Science 4, no. 4 (December 2022): 046801. http://dx.doi.org/10.1116/5.0126745.

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Transversely loaded bidimensional-magneto-optical-traps (2D-MOTs) have been recently developed as high flux sources for cold strontium atoms to realize a new generation of compact experimental setups. Here, we discuss on the implementation of a cross-polarized bi-color slower for a strontium atomic beam, improving the 2D-MOT loading and increasing the number of atoms up to [Formula: see text] atoms in the 461 nm MOT. Our slowing scheme addresses simultaneously two excited Zeeman substates of the 88Sr 1[Formula: see text]P1 transition at 461 nm. We also realized a three-axis active feedback control of the magnetic field down to the microgauss regime. Such a compensation is performed thanks to a network of eight magnetic field probes arranged in a cuboid configuration around the atomic cold sample and a pair of coils in a quasi-Helmholtz configuration along each of three Cartesian directions. Our active feedback is capable of efficiently suppressing most of the magnetically induced position fluctuations of the 689 nm intercombination-line MOT.
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Seitz, Michael, Marc Meléndez, Nerea Alcázar‐Cano, Daniel N. Congreve, Rafael Delgado‐Buscalioni, and Ferry Prins. "Mapping the Trap‐State Landscape in 2D Metal‐Halide Perovskites Using Transient Photoluminescence Microscopy (Advanced Optical Materials 18/2021)." Advanced Optical Materials 9, no. 18 (September 2021): 2170072. http://dx.doi.org/10.1002/adom.202170072.

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Bhattacharya, Shatabda, Diptiman Dinda, and Shyamal K. Saha. "Role of trap states on storage capacity in a graphene/MoO3 2D electrode material." Journal of Physics D: Applied Physics 48, no. 14 (March 18, 2015): 145303. http://dx.doi.org/10.1088/0022-3727/48/14/145303.

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Lee, Keun Woo, Kyung Min Kim, Si Joon Kim, Sreekantha Reddy Dugasani, Junwye Lee, Sung Ha Park, and Hyun Jae Kim. "Charge-trap effects of 2D DNA nanostructures implanted in solution-processed InGaZnO thin-film transistor." Journal of Physics D: Applied Physics 46, no. 21 (May 9, 2013): 215102. http://dx.doi.org/10.1088/0022-3727/46/21/215102.

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Dissertations / Theses on the topic "2D magneto optical trap"

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Jarvis, Kyle. "The blue-detuned magneto-optical trap." Thesis, Imperial College London, 2018. http://hdl.handle.net/10044/1/63833.

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It has been more than 30 years since the first demonstration of a magneto-optical trap (MOT) using sodium atoms. Since then the MOT has revolutionised the field of atomic physics by facilitating the emergence of a broad range of productive avenues of research using atoms prepared at low temperatures and high densities. This thesis describes the development of a novel kind of magneto-optical trap: the blue-detuned MOT. Unlike in all previous MOTs the light is blue detuned from atomic resonances and drives "type-II" transitions that have dark ground-state sub-levels. A discussion of the position-dependent and velocity-dependent forces experienced by an atom or molecule in a MOT is first used to consolidate recent theoretical work and, in particular, to introduce the concept of a blue-detuned MOT. The design and construction of an experiment that has been built to demonstrate a blue-detuned MOT using ⁸⁷Rb is described. A thorough characterisation of this novel MOT has been performed. At high magnetic field gradients, radiation-pressure-limited densities exceeding 10¹¹ cm⁻³ have been reached whilst temperatures are cooled below 30μK by the efficient and robust sub-Doppler cooling mechanisms. The maximum phase-space density measured is 6 x 10⁻⁶, which is higher than in most normal atomic MOTs, comparable to the best dark SPOTs, and a million times higher than that reported for red-detuned type-II MOTs. This makes the blue-detuned MOT particularly attractive for molecules where laser cooling and trapping always uses type-II transitions. For the first time, a study of trap loss due to ultra-cold collisions between atoms occurring in the presence of near-resonant blue-detuned light is undertaken. Finally, the experiment is used to demonstrate many new and unreported configurations of MOT for ⁸⁷Rb, showing that a comprehensive understanding of complicated MOTs is now possible, and presenting a clear direction for further research.
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Bounds, Alistair David. "A Rydberg-dressed magneto optical trap." Thesis, Durham University, 2018. http://etheses.dur.ac.uk/12541/.

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We Rydberg dress a magneto-optical trap of strontium atoms, mixing Rydberg character into atoms as they are cooled and confined. A recently developed tunable high-power narrow-linewidth 319 nm laser is used to excite and characterise triplet Rydberg states in strontium. Off-resonantly dressing a cloud of atoms in a narrow-line MOT operating on the 5s2 1S0 - 5s5p 3P1 transition, we observe a one-body AC Stark shift on the cloud, which we characterise to identify a regime in which only Rydberg dressed atoms are trapped in the MOT. In this cloud the Rydberg dressed atoms are both trapped and cooled. Increasing atomic density in the dressed MOT, plasma formation is observed at densities lower than the density necessary for observation of Rydberg dressed atoms. This plasma is caused by a build-up of charges due to spontaneous ionisation of Rydberg atoms, which then DC Stark shift the Rydberg state onto resonance with the coupling laser. The high charge density of the plasma then results in strong Rydberg excitation that causes rapid depletion of atoms. Regimes using optimum Rydberg states and charge-extracting electric fields are identified that may prevent plasma formation, and allow the interacting regime to be reached. Such a regime, with cooling, confinement, and tunable interactions, may form the basis of a quantum simulator for dissipative many-body systems.
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Nguyen, Hai Truong. "Magneto optical trap recoil ion momentum spectroscopy /." Search for this dissertation online, 2003. http://wwwlib.umi.com/cr/ksu/main.

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Hambach, Moritz. "Development of a magneto-optical trap for CaF molecules." Thesis, Imperial College London, 2017. http://hdl.handle.net/10044/1/54851.

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Laser cooling and trapping in a magneto-optical trap (MOT) have been essential to the success of cold atom physics in the last decades. Recently, the application of the same techniques to molecules has begun. The complexity of even a simple diatomic molecule makes laser cooling difficult, but promises new applications in many areas of research. In this thesis I describe the development of the first three-dimensional MOT of calcium fluoride (CaF) molecules. First, a cryogenic buffer gas source was set up, producing a pulsed beam of 9.3*10^10 molecules per steradian per pulse with forward velocities around 170 m/s. A similar source for very large molecules was set up during a 5 month internship at the University of Vienna. Next, the molecular pulse was slowed down to the capture velocity of a MOT using chirped laser slowing, resulting in about 7*10^5 CaF molecules passing through the typical MOT volume of 1 cm^3 at velocities of 15+-5 m/s. A new deceleration method, called Zeeman-Sisyphus deceleration, was also investigated. In this method molecules move through a spatially varying magnetic field and are optically pumped between low- and high-field seeking states in such as a way that they are always losing kinetic energy. The method promises to deliver more slow molecules because the molecules are guided transversely as they are decelerated. A small prototype was built and the optical pumping step was tested successfully. Finally, 7.6*10^3 CaF molecules were trapped in a MOT and cooled to a temperature of 8.5 mK. The radial trap frequency is 2 pi*130 Hz and the damping constant is beta=9.5*10^2 s^-1. The lifetime is about 100 ms and depends strongly on the scattering rate. This MOT is an an ideal starting point for a wide range of new experiments with ultracold molecules.
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Elnour, Huzifa Mohammed Ahamed Mohammed. "Development of a magneto optical trap for Rubidium 87." Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/85586.

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Thesis (MSc)-- Stellenbosch University, 2013.
ENGLISH ABSTRACT: A Magneto Optical Trap (MOT) is a configuration formed by three orthogonal pairs of counterpropagating circularly polarized laser beams and a magnetic field gradient. A MOT is used to cool, capture and trap large numbers of atoms in vacuum at very low temperature in K range. In this thesis the development of an experimental setup for realising a MOT of 87Rb atoms is presented. The atomic structure of Rb and the theoretical background of laser cooling and magneto optical trapping was reviewed. The influence of rubidium background pressure in the vacuum system, the laser beam size and the power and frequency on the number of the trapped atoms were studied in literature. The trapping and repumping lasers were characterised experimentally. Six circularly polarised trapping beams with equal power were formed and properly aligned to intersect at the center of the trapping cell. Two optical setups were designed and exploited to investigate and optimise the trapping beam polarisation. The repumping laser beam was successfully aligned and colinearly combined into all the trapping beams. Three different experimental setups for saturated absorption spectroscopy were developed. Saturated absorption spectra showing the hyperfine structure of both 85Rb and 87Rb isotopes were measured and are discussed. Using two saturated absorption spectroscopy setups, the frequencies of both lasers were successfully locked to the trapping and repumping transitions of 87Rb respectively. A rectangular trapping cell was designed and attached to the vacuum system. A pressure of about 10­¯7 mbar was achieved. The magnetic field coils were characterised and affixed on both sides of the cell in an anti-Helmholtz configuration. Setups for imaging and quantification of the 87Rb atoms in the MOT were designed. Finally, the procedures for demonstrating a MOT are presented. In conclusion, the current status of the project is reported, with recommendations for the future work.
AFRIKAANSE OPSOMMING: ’n Magneto optiese val (Magneto Optical Trap, MOT) is ’n konfigurasie wat gevorm word deur drie ortogonale laserbundelpare, wat elk uit twee sirkelvormig gepolariseerde bundels met teenoorgestelde voortplantingsrigtings bestaan, en ’n magneetveld gradient. ’n MOT word gebruik om ’n groot aantal atome af te koel, te vang en vas te hou in vakuum by ’n baie lae temperatuur in die K bereik. In hierdie tesis word die ontwikkeling van ’n eksperimentele optelling vir die realisering van ’n MOT van 87Rb atome voorgelê. Die atoomstruktuur van Rb en die teoretiese agtergrond van laser afkoeling en ’n magneto optiese val is hersien. Die invloed van die rubidium agtergronddruk in die vakuumstelsel, die grootte van die laserbundels en die laser drywing en frekwensie op die aantal gevangde atome is bestudeer uit die literatuur. Die MOT-laser en die optiese pomplaser is eksperimenteel gekarakteriseer. Ses sirkelvormig gepolariseerde MOT-laserbundels met gelyke drywings is gevorm en behoorlik belyn om in die middel van die MOT-sel te kruis. Twee optiese opstellings is ontwerp en gebruik om die polarisasie van die MOT-laserbundels te ondersoek en te optimeer. Die optiese pomplaserbundel is suksesvol belyn en ko-liniêr ekombineer met al die MOT-laserbundels. Drie verskillende eksperimentele opstellings vir versadigde absorpsie spektroskopie is ontwikkel. Versadigde absorpsie spektra wat die hiperfyn struktuur van beide die 85Rb en 87Rb isotope toon is gemeet en bespreek. Deur twee versadigde absorpsie spektroskopie opstellings te gebruik is die frekwensies van beide lasers suksesvol gestabiliseer op die MOT- en optiese pomp-oorgange van 87Rb onderskeidelik. ’n Reghoekige MOT-sel is ontwerp en aangesluit by die vakuumstelsel. ’n Druk van ongeveer 10­¯7 mbar is bereik. Die magneetveld spoele is gekarakteriseer en weerskante van die sel gemonteer in ’n anti-Helmholtz konfigurasie. Ten einde word die prosedures vir die demonstrasie van ’n MOT voorgelê. In die gevolgtrekking word daar verslag gedoen oor die status van die projek, met aanbevelings vir toekomstige werk.
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Rushton, Joseph. "A novel magneto-optical trap for integrated atom chips." Thesis, University of Southampton, 2015. https://eprints.soton.ac.uk/382951/.

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This thesis describes the design and construction of a new magneto optical trap that is suitable for use in integrated atom chips and other vacuum systems in which optical access is limited to a single window. The trap design relies on the switching of optical and magnetic fields and can operate at frequencies at least within the region of 1 kHz to 60 kHz. The design does not need patterned surfaces in order to generate the necessary beam geometry, requiring only the use of a single, standard mirror. Early temperature measurements have indicated that the trap may be capable of sub-Doppler cooling, and that it is able to capture on the order of 1:7 � 106 atoms in a capture volume of 0:18 cm3.
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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.
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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Hopkins, Stephen Antony. "Laser cooling of rubidium atoms in a magneto-optical trap." n.p, 1995. http://oro.open.ac.uk/19431/.

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Grünert, Jan. "Ultracold metastable calcium atoms in a bichromatic magneto-optical trap." [S.l.] : [s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=965196445.

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Hopkins, Stephen. "Laser cooling of rubidium atoms in a magneto-optical trap." Thesis, Open University, 1996. http://oro.open.ac.uk/19431/.

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This thesis describes theoretical and experimental work concerning radiation forces on atoms, with particular reference to rubidium atoms confined in a magneto-optical trap. After a short history of the field of laser cooling, a review of the semiclassical theory of mechanical interactions between two-level atoms and electromagnetic radiation is given. Different formulations of the semiclassical theory are discussed, including a new formulation in terms of momentum transfer amongst the plane wave modes of the electromagnetic field. Two important applications of light forces on atoms, namely 'optical molasses' and the 'magneto-optical trap', are then described with emphasis on experimental parameters. Three sub-Doppler cooling mechanisms, 'sisyphus cooling', 'motion-induced orientation cooling' and the 'magnetically-assisted sisyphus effect', are described and their role in optical molasses and the magneto-optical trap is discussed. A new study of the polarisation gradients which occur in 3-D monochromatic light fields is presented and quantifies their relative presence in different light field configurations. Polarisation gradient parameters are developed and shown to be directly related to the relativistic spin tensor of the light field. Implications of this polarisation gradient study for laser cooling work are discussed. The design, construction from scratch, operation and testing of a magneto-optical trap for rubidium are described, including novel designs for two vacuum cells. Preliminary experiments to characterise the trap are described and results are presented; they primarily concern the number and distribution of atoms in the trap. Finally. the theory of time domain spectroscopy is reviewed. The construction and testing of a pulsed dye laser for study of coherent transients in samples of laser-cooled atoms and a proposed experiment to measure the temperature of cold atoms using coherent transients are described. Factors expected to influence the shape of coherent transients in cold atoms are discussed.
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Book chapters on the topic "2D magneto optical trap"

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Atutov, S. N., V. Biancalana, A. Burchianti, R. Calabrese, L. Corradi, A. Dainelli, V. Guidi, et al. "The Legnaro Francium Magneto-Optical Trap." In Atomic Physics at Accelerators: Stored Particles and Fundamental Physics, 83–89. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-007-0946-1_14.

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Simsarian, J. E., A. Ghosh, G. Gwinner, L. A. Orozco, G. D. Sprouse, P. A. Voytas, and F. Xu. "Advances on Capturing Francium in a Magneto-Optical Trap." In Coherence and Quantum Optics VII, 391–92. Boston, MA: Springer US, 1996. http://dx.doi.org/10.1007/978-1-4757-9742-8_69.

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Hawrylak, P. "Magneto-Optics of Inhomogeneous Two-Dimensional Electron Gas." In Optical Properties of 2D Systems with Interacting Electrons, 151–58. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-010-0078-9_12.

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Martinez, Gerard. "Magneto-Optical Properties and Potential Fluctuations in High Mobility 2D Electron Gas." In Optical Properties of Semiconductor Nanostructures, 45–63. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-011-4158-1_4.

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Watanabe, K., S. Takeyama, T. Komatsu, N. Miura, and Y. Kaifu. "Magneto-optical Study of Excitons Localized Around 2D Defects of BiI3 in Pulsed High Magnetic Fields up to 47T." In High Magnetic Fields in Semiconductor Physics II, 301–4. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-83810-1_46.

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Nemova, Galina. "Magneto-optical Trap (MOT)." In Field Guide to Laser Cooling Methods. SPIE, 2019. http://dx.doi.org/10.1117/3.2538938.ch45.

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Myatt, C. J., N. R. Newbury, R. W. Ghrist, S. Loutzenhiser, and C. E. Wieman. "Multiply loaded magneto-optical trap." In Collected Papers of Carl Wieman, 410–12. WORLD SCIENTIFIC, 2008. http://dx.doi.org/10.1142/9789812813787_0054.

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Noh, Heung-Ryoul, and Wonho Jhe. "An Asymmetric Magneto-Optical Trap." In Recent Optical and Photonic Technologies. InTech, 2010. http://dx.doi.org/10.5772/6922.

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DePaola, B. D., R. Morgenstern, and N. Andersen. "MOTRIMS: Magneto–Optical Trap Recoil Ion Momentum Spectroscopy." In Advances In Atomic, Molecular, and Optical Physics, 139–89. Elsevier, 2008. http://dx.doi.org/10.1016/s1049-250x(07)55003-2.

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Lu, Z. T., K. L. Corwin, M. J. Renn, M. H. Anderson, E. A. Cornell, and C. E. Wieman. "Low-Velocity Intense Source of Atoms from a Magneto-optical Trap." In Collected Papers of Carl Wieman, 420–23. WORLD SCIENTIFIC, 2008. http://dx.doi.org/10.1142/9789812813787_0057.

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Conference papers on the topic "2D magneto optical trap"

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Simha, R., E. Knutson, G. R. Welch, and F. A. Narducci. "An Atom Gyroscope Using a 2D Tilted Magneto-Optical Trap." In Laser Science. Washington, D.C.: OSA, 2015. http://dx.doi.org/10.1364/ls.2015.lth4d.4.

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Cambier, V., C. Guo, J. Calvert, L. De Sarlo, and S. Bize. "Towards Using a 2D Magneto-Optical Trap to Improve a Mercury Optical Lattice Clock." In 2019 Joint Conference of the IEEE International Frequency Control Symposium anEuropean Frequency and Time Forum (EFTF/IFC). IEEE, 2019. http://dx.doi.org/10.1109/fcs.2019.8856115.

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Johansen, Jacob, Brian Estey, Mary Rowe, and Anthony Ransford. "Fast Loading of a Trapped Ion Quantum Computer Using a 2D Magneto-Optical Trap." In 2022 IEEE International Conference on Quantum Computing and Engineering (QCE). IEEE, 2022. http://dx.doi.org/10.1109/qce53715.2022.00050.

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Aucouturier, E. "The L.H.A. 2D magneto-optical trap: on the way to a continuous beam of cold atoms." In 10th International Conference on European Frequency and Time. IEE, 1996. http://dx.doi.org/10.1049/cp:19960051.

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Yu, J., J. Djemaa, P. Nosbaum, and P. Pillet. "Transverse magneto-optical compression of a frequency-chirping, slowed cesium atomic beam." In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1993. http://dx.doi.org/10.1364/oam.1993.thdd.18.

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We have transversally compressed a monokinetic cesium atomic beam in a 2D MOT1,2 on the F=4→F′=5 transition of the cesium IX, line. The longitudinal cooling was obtained by frequency-chirped diode lasers.3 Preliminary results have been obtained showing a final diameter of about 50pm and a density of 108at./cm3. We have studied the specificities of a multi-V system as the transition F=4→F′=5 in the cesium atom. Originally proposed for a three-level V-type atomic system4, the process can be easily generalized to F→F+1 (F>=1) transitions. In this case, the atom is assumed to be polarized into the Zeeman sub-level Mf=-F with respect to the local magnetic field inside of the trap. For a non-polarized statistic mixture, two effects modify the compression process. The first one is due to the large variation in the Clebsch-Gordan coefficients.3 The second one comes from the difference between the Larmor frequencies associated to the lower and the upper levels. The both effects lead to a mF-dependent restoring force. Efficient compression can be obtained by preparing the atomic population in the “good” Zeeman sub-levels, |MF|=F. Two methods have been explored in our experiments to polarize the atomic beam. The first one used an additional blue-detuned laser beam to increase the atomic population in the |MF|=f Zeeman sub-levels by optical pumping. In the second one, the σ-polarized cooling laser beam orientated the atomic population in the axial direction during the slowing process. This orientation was adiabatically transformed into transversal ones by entering in the trap. Further experiments are in progress.
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Morinaga, M. "A ring magneto-optical trap." In International Quantum Electronics Conference, 2005. IEEE, 2005. http://dx.doi.org/10.1109/iqec.2005.1560955.

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Chang, M. S., K. A. Brickman, M. Acton, A. Chew, D. Matsukevich, P. C. Haljan, V. S. Bagnato, and C. Monroe. "Magneto-Optical Trap of Cadmium." In International Conference on Quantum Information. Washington, D.C.: OSA, 2007. http://dx.doi.org/10.1364/icqi.2007.jwc28.

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Mariotti, E., K. Khanbekyan, C. Marinelli, L. Marmugi, L. Moi, L. Corradi, A. Dainelli, et al. "A magneto-optical trap for radioactive atoms." In Seventeenth International School on Quantum Electronics: Laser Physics and Applications, edited by Tanja N. Dreischuh and Albena T. Daskalova. SPIE, 2013. http://dx.doi.org/10.1117/12.2014795.

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Loftus, Thomas H., Tetsuya Ido, Andrew Ludlow, Martin Boyd, and Jun Ye. "Dynamics of a narrow line magneto-optical trap." In International Quantum Electronics Conference. Washington, D.C.: OSA, 2004. http://dx.doi.org/10.1364/iqec.2004.itua1.

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Surdutovich, Gregory. "Atomic collider into dual-isotope magneto-optical trap." In SPIE Proceedings, edited by Hans A. Bachor, Andre D. Bandrauk, Paul B. Corkum, Markus Drescher, Mikhail Fedorov, Serge Haroche, Sergei Kilin, and Alexander Sergienko. SPIE, 2006. http://dx.doi.org/10.1117/12.682577.

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