Relevant bibliographies by topics / Cold atom traps

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers
  5. Reports

Academic literature on the topic 'Cold atom traps'

Author: Grafiati
Published: 4 June 2021
Last updated: 2 February 2022

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Journal articles on the topic "Cold atom traps"

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Härter, A., and J. Hecker Denschlag. "Cold atom–ion experiments in hybrid traps." Contemporary Physics 55, no. 1 (January 2, 2014): 33–45. http://dx.doi.org/10.1080/00107514.2013.854618.

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Cherry, O., J. D. Carter, and J. D. D. Martin. "An atom chip for the manipulation of ultracold atoms." Canadian Journal of Physics 87, no. 6 (June 2009): 633–38. http://dx.doi.org/10.1139/p09-043.

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We have fabricated an atom chip that magnetically traps laser cooled 87Rb by generating high magnetic-field gradients using micrometre scale current-carrying wires. The wires are fabricated on a Si wafer (with a 40 nm SiO2 layer) using 1.2 μm thick Au and a 20 nm thick adhesion layer, and are patterned with lift-off photolithography. We characterize the number and temperature of the cold atoms trapped by the chip.
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Dimova, E., O. Morizot, G. Stern, C. L. Garrido Alzar, A. Fioretti, V. Lorent, D. Comparat, H. Perrin, and P. Pillet. "Continuous transfer and laser guiding between two cold atom traps." European Physical Journal D 42, no. 2 (February 2, 2007): 299–308. http://dx.doi.org/10.1140/epjd/e2007-00022-0.

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DE OLIVEIRA, M. C., and B. R. DA CUNHA. "COLLISION-DEPENDENT ATOM TUNNELING RATE — BOSE–EINSTEIN CONDENSATES IN DOUBLE AND MULTIPLE WELL TRAPS." International Journal of Modern Physics B 23, no. 32 (December 30, 2009): 5867–80. http://dx.doi.org/10.1142/s0217979209054818.

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The overlap of localized wave functions in a two-mode approximation leads to interaction (cross-collision) between ultra-cold atoms trapped in distinct sites of a double-well potential. We show that this interaction can significantly change the atom tunneling rate for special trap configurations resulting in an effective linear Rabi regime of population oscillation between the trap wells. In this sense, we demonstrate that cross-collisional effects can significantly extend the validity of the two-mode model approach allowing it to be alternatively employed to explain the recently observed increase of tunneling rates due to nonlinear interactions. Moreover, we investigate the extension for ultra-cold atoms trapped in an optical lattice. Control over the cross-collisional terms, obtained through manipulation of the optical trapping potential, can be used as an engineering tool to study many-body physics.
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Jian-Ping, Yin, Gao Wei-Jian, and Hu Jian-Jun. "Arrays of microscopic magnetic traps for cold atoms and their applications in atom optics." Chinese Physics 11, no. 5 (April 26, 2002): 472–80. http://dx.doi.org/10.1088/1009-1963/11/5/312.

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Timmermans, Eddy. "Progress and Prospects of Fermi Gas Physics in Cold Atom Traps." Physica Scripta 110 (2004): 302. http://dx.doi.org/10.1238/physica.topical.110a00302.

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Al-Amri, M., and M. Babiker. "Atomic reflection off conductor walls as a tool in cold atom traps." European Physical Journal D 48, no. 3 (June 13, 2008): 417–21. http://dx.doi.org/10.1140/epjd/e2008-00116-1.

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Yurovsky, V. A., and A. Ben-Reuven. "Incomplete optical shielding in cold atom traps: three-dimensional Landau-Zener theory." Physical Review A 55, no. 5 (May 1, 1997): 3772–79. http://dx.doi.org/10.1103/physreva.55.3772.

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Zhou, Feng, Xiao Li, Min Ke, Jin Wang, and Ming-Sheng Zhan. "Microwave coherent manipulation of cold atoms in optically induced fictitious magnetic traps on an atom chip." Chinese Physics B 26, no. 9 (August 2017): 090701. http://dx.doi.org/10.1088/1674-1056/26/9/090701.

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Niranjan, M., Anand Prakash, and S. A. Rangwala. "Analysis of Multipolar Linear Paul Traps for Ion–Atom Ultracold Collision Experiments." Atoms 9, no. 3 (June 29, 2021): 38. http://dx.doi.org/10.3390/atoms9030038.

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We evaluate the performance of multipole, linear Paul traps for the purpose of studying cold ion–atom collisions. A combination of numerical simulations and analysis based on the virial theorem is used to draw conclusions on the differences that result, by considering the trapping details of several multipole trap types. Starting with an analysis of how a low energy collision takes place between a fully compensated, ultracold trapped ion and an stationary atom, we show that a higher order multipole trap is, in principle, advantageous in terms of collisional heating. The virial analysis of multipole traps then follows, along with the computation of trapped ion trajectories in the quadrupole, hexapole, octopole and do-decapole radio frequency traps. A detailed analysis of the motion of trapped ions as a function of the amplitude, phase and stability of the ion’s motion is used to evaluate the experimental prospects for such traps. The present analysis has the virtue of providing definitive answers for the merits of the various configurations, using first principles.
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Dissertations / Theses on the topic "Cold atom traps"

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Burrows, Kathryn Alice. "Non-adiabatic losses from radio frequency dressed cold atom traps." Thesis, University of Sussex, 2016. http://sro.sussex.ac.uk/id/eprint/61380/.

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Cold atom traps are a promising tool for investigating and manipulating atomic behaviour. Radio frequency (RF) dressed cold atom traps allow high versatility of trapping potentials, which is important for potential applications, particularly in atom interferometry. This thesis investigates non-adiabatic spin flip transitions which can lead to losses of atoms from RF-dressed cold atom traps. We develop two models for the adiabatic potentials associated with RF-dressed traps, for the cases in which gravity does and doesn't have a significant effect. Within these two models we use first order perturbation theory to calculate decay rates for the number of dressed spin flip transitions per unit time. Our obtained decay rates are dependent on the atomic energy. For RF-dressed cold atom traps in which spin flip transitions lead to losses of atoms from the trap, we are able to predict ow non-adiabatic transitions decrease the trapped atom number. We achieve this by modelling the atomic distribution of energies for several different scenarios. The thesis concludes with a comparison to experimental data, including modelling how atomic energies are affected by noise in the currents generating the trapping magnetic fields.
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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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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 view to enabling efficient evaporative cooling in the single chamber, loading MOTs of up to 10⁸ atoms using pulsed dispensers. The LIAD is found to be ineffective in loading large MOTs in this setup, while the pulsed dispensers method gradually increases the background pressure in the chamber over time. Based on the results of this first iteration, we designed and built a second single-chamber apparatus for cooling of ⁸⁷Rb to quantum degeneracy. The LIAD technique was used to successfully load MOTs containing 8x10⁷ atoms in this single pyrex cell with a rapidly-varying background pressure. The lifetime of an atomic cloud loaded from the MOT into a magnetic trap increased by a factor of 6 when LIAD was used. The holographic optical traps for cold atoms are generated using a Spatial Light Modulator, and we present our novel method for improving the quality of holographic light patterns to the point where they are suitable for trapping ultracold atoms using a feedback algorithm. As demonstrations of this new capability, we show power-law optical traps which provide an efficient, reversible route to Bose-Einstein Condensation and a dynamic ring trap for the investigation of superfluidity in cold atoms.
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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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Walker, Graeme. "Trans-spectral transfer of orbital angular momentum and creation of an ultra high density cold atom trap." Thesis, University of Glasgow, 2013. http://theses.gla.ac.uk/4498/.

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In recent years there has been great interest in the applications of the interaction of the phase and intensity of laser light in atomic vapours. The generation of light beams with arbitrary phase and intensity patterns can now be easily achieved by using Spatial Light Modulators (SLMs). The transformation of quantized units of phase information to atomic vapours has implications in the fields of quantum optics for the realisation of sources of entangled photons, optical switching, and quantum information storage. Spatially shaped beams with non-trivial intensity geometries have found use in single atom quantum well traps and for the enhancement of density of standard Magneto Optical Traps. The work in this thesis is focussed around two main pro jects, involving the interaction of holographically shaped light beams with cold trapped atoms and with a hot atomic vapour respectively. An enhancement to the previously investigated technique of a SPontaneous force Optical Trap SPOT of 87 Rb is presented here which aims to solve various issues which naturally arise from compressing cold atoms in a Magneto Optical Trap (MOT) such as unavoidable heating during the compression. High density/high atom number traps are highly sought after in many experiments for more efficient transfer of atoms to Bose Einstein Condensates and for improved quantum storage capabilities in cold atom traps. The highest density achieved in our SPOT was 2.5 × 10^12 atoms cm−3 for 2 × 10^8 atoms at a temperature of approximately 100µK. This represents almost 2 orders of magnitude increase in density from the standard MOT setup with no adverse heating of the trap while maintaining 75% of the atoms. In the second part of this work hot atomic vapours are utilized for the efficient transfer of orbital angular momentum information from near infra-red pump fields, driving from 5S_1/2 to 5D_5/2 on a two-photon transition, to a cascade from 5D_5/2 to 6P_3/2 to 5S_1/2 generating 5230nm light and a coherent blue, 420nm, beam respecitively. This generation is performed using four wave mixing in 85 Rb. We observe the complete conversion of all input quantum information, the Orbital Angular Momentum (OAM) from the pump fields to the blue. In addition we show the additional phase coherence effects of this experiment through the use of simple superpositions of Laguerre-Gaussian (LG) modes showing that the process is indeed quantum in nature. A theoretical basis for the transfer of all OAM information to only the 420nm beam is also discussed here.
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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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Dinkelaker, Aline. "Smooth inductively coupled ring trap for cold atom optics." Thesis, University of Strathclyde, 2013. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=19200.

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The main topic in this thesis is the proof-of-principle experiment for an inductively coupled magnetic ring trap for applications in atom interferometry and quantum gas investigations. Atom interferometry utilises the wave nature of atoms for precision measurements of gravitational and inertial effects and to test fundamental physics. Due to their symmetry, their periodic boundary conditions and their large enclosed areas, ring traps provide attractive geometries for atom interferometry. By tightening the trap and reducing the trap radius, toroidal traps also have excellent conditions to study super uid properties in degenerate gases. The trapping potential for the inductively coupled magnetic ring trap is formed by the superposition of an external AC eld and a local AC eld, created by the induced current in a copper ring. These fields cancel in a ring and create a time-averaged trapping potential. By inducing the current in the conductor and using AC over DC elds several problems of existing trapping mechanisms are addressed. We create a smooth, scalable trapping potential for cold atoms. We load the inductively coupled ring trap with ~ 10p6s laser cooled p87sRb atoms. The atoms can be observed evolving around the ring in the horizontal plane, until the ring is completely filllled. We record vacuum limited lifetimes of ~ 1:3s after initial Majorana losses. With an added o set eld we also gain exibility in the trap geometry regarding the radius (~5 mm) and the trap width (~0:5 mm). In a subsequent experiment, the setup and the ring trap parameters are changed to allow for the creation of p87sRb Bose-Einstein condensate and for the implementation of atom interferometry in the ring trap. A vertical, smaller ring trap with a radius of ~ 1:8 mm is created. Laser cooled atoms are loaded either at the top or at the bottom of the ring.
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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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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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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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Book chapters on the topic "Cold atom traps"

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Friedman, Nir, Ariel Kaplan, and Nir Davidson. "Dark Optical Traps for Cold Atoms." In Advances In Atomic, Molecular, and Optical Physics, 99–151. Elsevier, 2002. http://dx.doi.org/10.1016/s1049-250x(02)80007-6.

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Barkai, Eli, and David A. Kessler. "Transport and the First Passage Time Problem with Application to Cold Atoms in Optical Traps." In First-Passage Phenomena and Their Applications, 502–31. WORLD SCIENTIFIC, 2014. http://dx.doi.org/10.1142/9789814590297_0020.

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Taber, Douglass F. "C–O Ring Construction: The Oger/Lee/Galano Synthesis of 7(RS)-ST-Δ8-11-dihomo-Isofuran." In Organic Synthesis. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780190646165.003.0047.

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Shaorong Yang and Huanfeng Jiang of the South China University of Technology assembled (Angew. Chem. Int. Ed. 2014, 53, 7219) the β-lactone 3 by the Pd-catalyzed addition of 2 to the alkyne 1. Jack R. Norton of Columbia University observed (J. Am. Chem. Soc. 2015, 137, 1036) that the vanadium-mediated reduc­tive cyclization of 4 proceeded by a free radical mechanism, leading to the cis 3,4-disubstituted tetrahydrofuran 5. The cyclization of 6 to 7 developed (J. Org. Chem. 2015, 80, 965) by Glenn M. Sammis of the University of British Columbia also involved H atom transfer. Amy R. Howell of the University of Connecticut devised (J. Org. Chem. 2015, 80, 5196) the ring expansion of the β-lactone 8 to the tet­rahydrofuran 9. Dmitri V. Filippov and Jeroen D. C. Codée of Leiden University showed (J. Org. Chem. 2015, 80, 4553) that the net reductive alkylation of the lac­tone 10 led to 11 with high diastereocontrol. A. Stephen K. Hashmi of the Ruprecht-Karls-Universität Heidelberg optimized (Chem. Eur. J. 2015, 21, 427) the gold-mediated rearrangement of the ester 12 to the lactone 13. This reaction apparently proceeded by the coupling of the metalated lac­tone with a propargylic carbocationic species. Benjamin List of the Max-Planck-Institut für Kohlenforschung developed (Angew. Chem. Int. Ed. 2015, 54, 7703) an organocatalyst that mediated the addition of 15 to 14, leading to 16 in high ee. Scott E. Denmark of the University of Illinois published (Nature Chem. 2015, 6, 1056) a detailed study of the enantioselective cyclization of 17 to 18. Shunichi Hashimoto of Hokkaido University established (Tetrahedron Lett. 2015, 56, 1397) that his catalyst was effective for the cycli­zation of 19 to 20. Debendra K. Mohapatra of the Indian Institute of Chemical Technology showed (J. Org. Chem. 2015, 80, 1365) that allyl trimethylsilane could trap the intermediate from the cyclization of 21, leading to 22 with high diastereocontrol. Young-Ger Suh of Seoul National University used (Chem. Commun. 2015, 51, 9026) a Pd catalyst to cyclize 23 to (−)-deguelin 24. John Montgomery of the University of Michigan showed (Org. Lett. 2015, 17, 1493) that the Ni-catalyzed reduc­tive cyclization of 25 to 26 proceeded with high diastereoselectivity.
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Conference papers on the topic "Cold atom traps"

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Wang, Charles H. T., Robert Bingham, J. Tito Mendonça, Padma K. Shukla, José Tito Mendonça, Bengt Eliasson, and David Resedes. "Probing spacetime fluctuations using cold atom traps." In INTERNATIONAL TOPICAL CONFERENCE ON PLASMA SCIENCE: Strongly Coupled Ultra-Cold and Quantum Plasmas. AIP, 2012. http://dx.doi.org/10.1063/1.3679598.

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Yurovsky, Vladimir, and Abraham Ben-Reuven. "Incomplete optical shielding in cold sodium atom traps." In The 13th international conference on spectral line shapes. AIP, 1997. http://dx.doi.org/10.1063/1.51786.

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Raithel, Georg. "Rydberg atom gases and cold plasmas in cryogenic traps." In Frontiers in Optics. Washington, D.C.: OSA, 2003. http://dx.doi.org/10.1364/fio.2003.wqq2.

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Davidson, Nir. "Dark optical traps for ultra-cold atoms." In 19th Congress of the International Commission for Optics: Optics for the Quality of Life, edited by Giancarlo C. Righini and Anna Consortini. SPIE, 2003. http://dx.doi.org/10.1117/12.525477.

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Tempone-Wiltshire, S., S. Johnstone, P. Starkey, and K. Helmerson. "High efficiency holographic optical traps for cold atoms." In Frontiers in Optics. Washington, D.C.: OSA, 2015. http://dx.doi.org/10.1364/fio.2015.fth1c.7.

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Fatemi, Fredrik K., Spencer E. Olson, Mark Bashkansky, Zachary Dutton, and Matthew Terraciano. "Single-beam, dark toroidal optical traps for cold atoms." In Integrated Optoelectronic Devices 2007, edited by David L. Andrews, Enrique J. Galvez, and Gerard Nienhuis. SPIE, 2007. http://dx.doi.org/10.1117/12.701078.

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Sereno, M., L. S. Cruz, F. C. Cruz, Niklaus Ursus Wetter, and Jaime Frejlich. "Deep Optical Trap for Cold Calcium Atoms." In RIAO∕OPTILAS 2007: 6th Ibero-American Conference on Optics (RIAO); 9th Latin-American Meeting on Optics, Lasers and Applications (OPTILAS). AIP, 2008. http://dx.doi.org/10.1063/1.2926902.

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Pohl, T., H. R. Sadeghpour, Yasuyuki Kanai, and Yasunori Yamazaki. "Formation of Antihydrogen Rydberg atoms in strong magnetic field traps." In PROCEEDINGS OF THE WORKSHOP ON COLD ANTIMATTER PLASMAS AND APPLICATION TO FUNDAMENTAL PHYSICS. AIP, 2008. http://dx.doi.org/10.1063/1.2977838.

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Grabowski, A., and T. Pfau. "A lattice of magneto-optical and magnetic traps for cold atoms." In 2003 European Quantum Electronics Conference. EQEC 2003 (IEEE Cat No.03TH8665). IEEE, 2003. http://dx.doi.org/10.1109/eqec.2003.1314131.

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Raithel, G., B. Knuffman, M. H. Shah, C. Hempel, E. Paradis, R. Mhaskar, X. Zhang, et al. "Atoms and plasmas in a high-magnetic-field trap." In PROCEEDINGS OF THE WORKSHOP ON COLD ANTIMATTER PLASMAS AND APPLICATION TO FUNDAMENTAL PHYSICS. AIP, 2008. http://dx.doi.org/10.1063/1.2977837.

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Reports on the topic "Cold atom traps"

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Raithel, Georg. Interactions of Cold Rydberg Atoms in a High-Magnetic-Field Atom Trap - Final Report. Office of Scientific and Technical Information (OSTI), June 2011. http://dx.doi.org/10.2172/1015766.

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Crookston, M. B., P. M. Baker, and M. P. Robinson. A Microchip Ring Trap for Cold Atoms. Fort Belvoir, VA: Defense Technical Information Center, September 2005. http://dx.doi.org/10.21236/ada440211.

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