Bibliographies thématiques / Optical lattice clocks

Littérature scientifique sur le sujet « Optical lattice clocks »

Auteur : Grafiati
Publié le 14 mars 2023

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Articles de revues sur le sujet "Optical lattice clocks"

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Oates, Christopher W., et Andrew D. Ludlow. « Optical Lattice Clocks ». Optics and Photonics News 26, no 1 (1 janvier 2015) : 36. http://dx.doi.org/10.1364/opn.26.1.000036.

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Lemonde, P. « Optical lattice clocks ». European Physical Journal Special Topics 172, no 1 (juin 2009) : 81–96. http://dx.doi.org/10.1140/epjst/e2009-01043-5.

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Ushijima, Ichiro, Masao Takamoto, Manoj Das, Takuya Ohkubo et Hidetoshi Katori. « Cryogenic optical lattice clocks ». Nature Photonics 9, no 3 (9 février 2015) : 185–89. http://dx.doi.org/10.1038/nphoton.2015.5.

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Horiuchi, Noriaki. « Ever-evolving optical lattice clocks ». Nature Photonics 16, no 1 (20 décembre 2021) : 4–5. http://dx.doi.org/10.1038/s41566-021-00935-3.

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Singh, Sukhjit, Jyoti, Bindiya Arora, B. K. Sahoo et Yan-mei Yu. « Magic Wavelengths for Optical-Lattice Based Cs and Rb Active Clocks ». Atoms 8, no 4 (10 novembre 2020) : 79. http://dx.doi.org/10.3390/atoms8040079.

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Active clocks could provide better stabilities during initial stages of measurements over passive clocks, in which stabilities become saturated only after long-term measurements. This unique feature of an active clock has led to search for suitable candidates to construct such clocks. The other challenging task of an atomic clock is to reduce its possible systematics. A major part of the optical lattice atomic clocks based on neutral atoms are reduced by trapping atoms at the magic wavelengths of the optical lattice lasers. Keeping this in mind, we find the magic wavelengths between all possible hyperfine levels of the transitions in Rb and Cs atoms that were earlier considered to be suitable for making optical active clocks. To validate the results, we give the static dipole polarizabilities of Rb and Cs atoms using the electric dipole transition amplitudes that are used to evaluate the dynamic dipole polarizabilities and compare them with the available literature values.
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Zhang, Xibo, et Jun Ye. « Precision measurement and frequency metrology with ultracold atoms ». National Science Review 3, no 2 (15 mars 2016) : 189–200. http://dx.doi.org/10.1093/nsr/nww013.

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Abstract Precision measurement and frequency metrology have pushed many scientific and technological frontiers in the field of atomic, molecular and optical physics. In this article, we provide a brief review on the recent development of optical atomic clocks, with an emphasis placed on the important inter-dependence between measurement precision and systematic effects. After presenting a general discussion on the motivation and techniques behind the development of optical lattice clocks, where the use of many atoms greatly enhances the measurement precision, we present the JILA strontium optical lattice clock as the leading system of frequency metrology with the lowest total uncertainty, and we describe other related research activities. We discuss key ingredients that have enabled the optical lattice clocks with ultracold atoms to reach the 18th digit in both precision and accuracy. Furthermore, we discuss extending the power of precision clock spectroscopy to study quantum many-body physics and to provide control for atomic quantum materials. In addition, we explore future research directions that have the potential to achieve even greater precision.
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Tarallo, Marco G. « Toward a quantum-enhanced strontium optical lattice clock at INRIM ». EPJ Web of Conferences 230 (2020) : 00011. http://dx.doi.org/10.1051/epjconf/202023000011.

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The new strontium atomic clock at INRIM seeks to establish a new frontier in quantum measurement by joining state-of-the-art optical lattice clocks and the quantized electromagnetic field provided by a cavity QED setup. The goal of our experiment is to apply advanced quantum techniques to state-of-the-art optical lattice clocks, demonstrating enhanced sensitivity while preserving long coherence times and the highest accuracy. In this paper we describe the current status of the experiment and the prospected sensitivity gain for the designed cavity QED setup.
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Lodewyck, Jérôme, Philip G. Westergaard, Arnaud Lecallier, Luca Lorini et Pierre Lemonde. « Frequency stability of optical lattice clocks ». New Journal of Physics 13, no 5 (6 mai 2011) : 059501. http://dx.doi.org/10.1088/1367-2630/13/5/059501.

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Derevianko, Andrei, et Hidetoshi Katori. « Colloquium : Physics of optical lattice clocks ». Reviews of Modern Physics 83, no 2 (3 mai 2011) : 331–47. http://dx.doi.org/10.1103/revmodphys.83.331.

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Katori, Hidetoshi, Tetsushi Takano et Masao Takamoto. « Optical lattice clocks and frequency comparison ». Journal of Physics : Conference Series 264 (10 janvier 2011) : 012011. http://dx.doi.org/10.1088/1742-6596/264/1/012011.

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Thèses sur le sujet "Optical lattice clocks"

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Barber, Zeb. « Ytterbium optical lattice clock ». Connect to online resource, 2007. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3284459.

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He, Wei. « Towards miniaturized strontium optical lattice clock ». Thesis, University of Birmingham, 2017. http://etheses.bham.ac.uk//id/eprint/7460/.

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Optical atomic clocks with precisions and accuracies in the 10\(^-\)\(^1\)\(^8\) level [1] are now the most advanced man-made timekeeping devices. They outperform the microwave cesium atomic clocks that realize the SI definition of the second. Scaling down the size of optical atomic clocks may open the door to a range of industrial and space applications. In this thesis, the design and preliminary results of a compact strontium cooling system are presented. In the first cooling stage, the high power 461 nm laser with 300 mW output features a modular design, while smaller laser sources for demonstrating a strontium magneto-optical trap have also been investigated. An innovative design that couples a spectroscopy cell directly into the scientific chamber reduces the overall size and power consumption of the system. Additionally, using strontium oxide as a source of strontium atoms suitable for optical clocks has achieved initial success. For the first time, a single-beam MOT configuration is applied to strontium. In this novel apparatus, the blue MOT and red MOT broadband cooling phases are able to trap 5x10\(^6\) and 1000 atoms, respectively. This work shows promising progress towards developing a functional miniaturized strontium optical lattice clock.
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Bridge, Elizabeth Michelle. « Towards a strontium optical lattice clock ». Thesis, University of Oxford, 2012. http://ora.ox.ac.uk/objects/uuid:a96e73fe-f17b-4738-be1d-34429b5b4a05.

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Due to the recent success, in terms of accuracy and precision, of a number of strontium optical lattice optical frequency standards, and the classification of the 5s2 1S0 to 5s5p 3P0 transition in neutral strontium as a secondary definition of the SI unit of the second, many new strontium lattice clocks are under development. The strontium optical lattice clock (Sr OLC) at the National Physical Laboratory (NPL) is one such project. This thesis describes the design and build of the NPL Sr OLC, discussing the considerations behind the design. Details of the first cooling stage are given, which includes the characterisation of a novel permanent-magnet Zeeman slower by measurements of the longitudinal velocity distributions and loading of the MOT at 461 nm. Development of a narrow linewidth laser system at 689 nm is described, which is used for initial spectroscopy of the second-stage cooling transition. In particular, this work describes progress towards two independent ultra-narrow linewidth clock lasers. The new generation of strontium lattice clock experiments have focused on characterising the systematic frequency shifts and reducing their associated fractional frequency uncertainties, as well as reducing the fractional frequency instability of the measurement. One focus of the Sr OLC at NPL is to help characterise the frequency shift of the clock transition due to black-body radiation (BBR), which is currently the largest contributor to the uncertainty budget of the measured clock frequency. Our approach, discussed here, is to make a direct, differential measurement of the shift with the atoms housed alternately in environments of differing temperatures. Better characterisation and control of the BBR frequency shift of the strontium clock transition is crucial for the future of the Sr OLC as a leading frequency standard.
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Hobson, Richard. « An optical lattice clock with neutral strontium ». Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:d52faaaf-307c-4b48-847f-be590f46136f.

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Strontium optical lattice clocks can measure the passage of time with extraordinary precision. Capitalising on this precision, we can anticipate the deployment of lattice clocks to search for new physics beyond the standard model, to build new technologies for geodesy and navigation, and potentially to underpin a future redenition of the SI second. This thesis reports on the construction and evaluation of a robust Sr optical lattice clock at NPL. We describe the apparatus needed to capture, cool, and load samples of neutral strontium atoms into a magic-wavelength, far off-resonant lattice trap at 813 nm. We provide details of our optical local oscillator - the "clock laser" - and how it is used to realise an Sr-referenced optical frequency standard. We rigorously characterise the various contributing factors which limit the performance of the clock, focusing on the standard measures of (1) frequency instability, and (2) systematic frequency uncertainty. Finally, we introduce new innovations for improving the accuracy of the 88Sr lattice clock, including methods of "modified hyper-Ramsey" and multi-photon spectroscopy of the clock transition.
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Smith, Lyndsie Laura. « A transportable strontium optical lattice clock towards space ». Thesis, University of Birmingham, 2016. http://etheses.bham.ac.uk//id/eprint/7132/.

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This work presents the realisation and characterisation of the world’s smallest transportable optical lattice clock as part of the Space Optical Clocks 2 EU project built at the University of Birmingham. Housed in a transportable rack of dimensions 170 x 100 x 60 cm, such a device aims to measure the frequency of the doubly-forbidden 1S0−3P0 clock transition in 88Sr in an unprecedented compact apparatus as a major technological milestone towards an optical clock upon the International Space Station. A master optical clock in space would serve with unrivalled accuracy and stability to disseminate a precise and accurate reference for terrestrial clocks and the coordination of international time. Such a clock has the potential to redefine the second, revolutionise timekeeping and precision measurements, and perform fundamental science experiments in space. Using a combination of novel design, innovative cooling techniques, and robust, compact commercially available products, the clock portability, robustness and operational simplicity have been improved. The apparatus simply and effectively cools and traps up to 105 88Sr atoms at a temperature of 1.3±0.2μK in an optical lattice with a lifetime of 0.52±0.01s within 400ms. The most recent preliminary clock spectroscopy measurement was 3.6 ± 0.2Hz. The instability of the clock has been measured at 8×10−17 after averaging for 300s with the goal instability being 5.8×10−17 within the same averaging time. These results show the experiment will lead transportable optical clock research and continue with the goal of being a master clock in space.
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Ludlow, Andrew D. « The strontium optical lattice clock : Optical spectroscopy with sub-hertz accuracy ». Connect to online resource, 2008. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3308676.

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Origlia, Stefano [Verfasser]. « A high-performance bosonic optical lattice clock / Stefano Origlia ». Düsseldorf : Universitäts- und Landesbibliothek der Heinrich-Heine-Universität Düsseldorf, 2018. http://d-nb.info/1169393357/34.

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Abou, Jaoudeh Charbel [Verfasser]. « Setup of a Transportable Yb Optical Lattice Clock / Charbel Abou Jaoudeh ». Düsseldorf : Universitäts- und Landesbibliothek der Heinrich-Heine-Universität Düsseldorf, 2016. http://d-nb.info/1082033316/34.

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Grotti, Jacopo [Verfasser]. « A transportable optical lattice clock for metrology and geodesy / Jacopo Grotti ». Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2018. http://d-nb.info/1172414173/34.

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Yu, QinQin. « Characterization of a two-color magneto-optical trap for a spin-squeezed optical lattice clock ». Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/100323.

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Thesis: S.B., Massachusetts Institute of Technology, Department of Physics, 2015.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 57-58).
We experimentally realize a magneto-optical trap (MOT) for ytterbium that simultaneously scatters light from two atomic transitions, in order to reduce the minimum magnetic field gradient required for trapping atoms. From the experimental data, we propose a model of the MOT where one transition is responsible for trapping the atoms the other transition is responsible for cooling the atoms. In order to test this model and to better understand the dynamics of this two-color MOT, we perform numerical simulations of the contributions of each transition to the steady-state number of trapped atoms. We then compare the results of the simulations with the experimental results and conclude that the model of the separated trapping and cooling functions is a good model for the two-color MOT. Finally, we examine other elements for which the two-color MOT is possible and derive a condition for the linewidths of the two transitions such that the atoms are trapped.
by QinQin Yu.
S.B.
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Chapitres de livres sur le sujet "Optical lattice clocks"

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Takamoto, Masao, et Hidetoshi Katori. « Optical Lattice Clocks for Precision Time and Frequency Metrology ». Dans Principles and Methods of Quantum Information Technologies, 93–110. Tokyo : Springer Japan, 2016. http://dx.doi.org/10.1007/978-4-431-55756-2_5.

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Derevianko, Andrei, et Sergey G. Porsev. « Accurate Evaluation of Parameters of Optical Lattice Clocks ». Dans Advances In Atomic, Molecular, and Optical Physics, 415–59. Elsevier, 2011. http://dx.doi.org/10.1016/b978-0-12-385508-4.00009-7.

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Tanaka, Yoshiyuki, et Yosuke Aoki. « A Geodetic Determination of the Gravitational Potential Difference Toward a 100-km-Scale Clock Frequency Comparison in a Plate Subduction Zone ». Dans International Association of Geodesy Symposia. Berlin, Heidelberg : Springer Berlin Heidelberg, 2022. http://dx.doi.org/10.1007/1345_2022_147.

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AbstractRecent advances in the developments of optical atomic clocks have enabled 10−18-level frequency comparisons between fibre-linked clocks. Therefore, chronometric leveling with an uncertainty on the order of 1 cm has become possible, based on the general theory of relativity. Since measurement uncertainty does not deteriorate with increasing fibre length, applications of chronometric leveling in geodesy, particularly unification of height reference systems, have been actively studied. In Japan, a frequency comparison is under experimentation using a fibre link connecting two optical lattice clocks approximately 100 km apart. This study estimates both the potential difference between these two clock sites with a geodetic method and its uncertainty to verify the results of chronometric leveling, which will be obtained in the near future. We use orthometric heights derived from leveling surveys repeated for monitoring crustal deformation. When discussing an uncertainty at the 1-cm level in height, the effects of temporal variations in the gravitational potential on the height measurement need to be considered due to various geophysical phenomena, including tides. Our results show that the uncertainty in the height measurements by geodetic leveling is the largest and that tidal potential changes during the height measurements can cause systematic errors of a few mm. The effects due to variations in the nontidal ocean bottom pressure and atmospheric pressure are more than an order of magnitude smaller than the tidal effects at this spatial scale. An upper limit of groundwater effects is also estimated. In a future comparison with clocks with an uncertainty on the order of 10−19, tidal potential changes and groundwater effects must be more rigorously evaluated.
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Actes de conférences sur le sujet "Optical lattice clocks"

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Lemonde, P. « Optical lattice clocks ». Dans 11th European Quantum Electronics Conference (CLEO/EQEC). IEEE, 2009. http://dx.doi.org/10.1109/cleoe-eqec.2009.5192566.

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Bookjans, E., S. Bilicki, G. Vallet, R. Letargat et J. Lodewyck. « Operational strontium optical lattice clocks ». Dans 2016 Conference on Precision Electromagnetic Measurements (CPEM 2016). IEEE, 2016. http://dx.doi.org/10.1109/cpem.2016.7540549.

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Takamoto, M., T. Akatsuka, H. Hachisu et H. Katori. « Optical lattice clocks toward 10-17uncertainty ». Dans SPIE Optical Engineering + Applications, sous la direction de Tetsuya Ido et Derryck T. Reid. SPIE, 2009. http://dx.doi.org/10.1117/12.825979.

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Takamoto, Masao, Tetsushi Takano et Hidetoshi Katori. « Frequency comparison of optical lattice clocks ». Dans SPIE Optical Engineering + Applications, sous la direction de Tetsuya Ido et Thomas R. Schibli. SPIE, 2011. http://dx.doi.org/10.1117/12.896521.

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Katori, Hidetoshi, Masao Takamoto, Tomoya Akatsuka et Ryoichi Higashi. « Frequency Comparison between Optical Lattice Clocks ». Dans 2007 Conference on Lasers and Electro-Optics - Pacific Rim. IEEE, 2007. http://dx.doi.org/10.1109/cleopr.2007.4391550.

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Katori, Hidetoshi, Masao Takamoto, Tomoya Akatsuka et Ryoichi Higashi. « Frequency comparison between optical lattice clocks ». Dans Optics East 2007, sous la direction de Yasuhiko Arakawa, Masahide Sasaki et Hideyuki Sotobayashi. SPIE, 2007. http://dx.doi.org/10.1117/12.733620.

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Katori, Hidetoshi. « Optical lattice clocks and frequency comparisons ». Dans 2010 Conference on Precision Electromagnetic Measurements (CPEM 2010). IEEE, 2010. http://dx.doi.org/10.1109/cpem.2010.5544504.

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Martin, M. J., M. D. Swallows, T. Nicholson, M. Bishof, B. Bloom, J. Williams, S. Campbell et J. Ye. « 87Sr optical lattice clocks at JILA ». Dans 2012 Conference on Precision Electromagnetic Measurements (CPEM 2012). IEEE, 2012. http://dx.doi.org/10.1109/cpem.2012.6250909.

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Newman, Zachary, David Carlson, Andrew Ferdinand et Scott B. Papp. « Engineered Multi-Output Supercontinuum Generation in Tantala Waveguides for Optical-Lattice-Clock Stabilization ». Dans CLEO : Science and Innovations. Washington, D.C. : Optica Publishing Group, 2022. http://dx.doi.org/10.1364/cleo_si.2022.sm2f.5.

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We create a tantala nanophotonic waveguide circuit to generate supercontinuum spectrum that covers all the wavelength bands required for a strontium optical-lattice clock. The phase-locked supercontinuum is a versatile tool for compact and manufacturable optical clocks.
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Schiller, S., A. Gorlitz, C. Abou-Jaoudeh, G. Mura, T. Franzen, A. Nevsky, S. Alighanbari et al. « Development of compact lattice optical clocks towards future space clocks ». Dans 2013 Conference on Lasers & Electro-Optics Europe & International Quantum Electronics Conference CLEO EUROPE/IQEC. IEEE, 2013. http://dx.doi.org/10.1109/cleoe-iqec.2013.6801752.

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Rapports d'organisations sur le sujet "Optical lattice clocks"

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Lemke, N. D. An Optical Lattice Clock with Spin 1/2 Atoms. Fort Belvoir, VA : Defense Technical Information Center, janvier 2012. http://dx.doi.org/10.21236/ad1007299.

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Rey, A. M., A. V. Gorshkov, C. V. Kraus, M. J. Martin, M. Bishof, M. D. Swallows, X. Zhang et al. Probing Many-Body Interactions in an Optical Lattice Clock (Preprint). Fort Belvoir, VA : Defense Technical Information Center, octobre 2013. http://dx.doi.org/10.21236/ada604165.

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