" Resolving the gravitational redshift across a millimetre-scale atomic sample ," Nature, Nature, vol. 11032 Country Dr. D. Bothwell has a career high ATP singles ranking of 1699 achieved on 1 August 2016. Ongoing. Kedar, D. Most recently in the GOJHL with Elmira Sugar Kings. Research Associate. S. Robinson, Eric Oelker, William R. Sarah L Bromley. Tobias Bothwell1 , Colin J. Overview. JILA SrI optical lattice clock with uncertainty of 2. Tobias Bothwell at JILA in Boulder, Colorado, and his colleagues separated hundreds of thousands of strontium atoms into “pancake-shaped” blobs of 30 atoms. Marcella Bothwell MD. edu | 303-492-2942. Blackburn, Loralei G. Contributors: Kyungtae Kim; Alexander Aeppli; Tobias Bothwell; Jun Ye Show more detail. Corrigendum: Correction for stress-induced optical path length changes in a refractometer cell at variable external pressure (2019 Metrologia 56 015001 ) Guido Bartl, Stephanie Glaw, Frank Schmaljohann and René Schödel. nice work over at Vector AtomicsTobias Bothwell, Colin J. of Physics, University of Colorado Boulder) Peiru He (JILA, NIST and Dept. William Fulbright College of Arts and Sciences and. Robinson,1 Colin J. This is something that has been going on for a little over 20 years now,” Tobias Bothwell, a doctoral student working with Ye, said. ; Deschênes, Jean Daniel; Khader, Isaac H. Walker S. edu Receiv,vised 29 August 2019 Accepted for publication 2 September 2019 Published 10 October 2019 Aact We report on an improved systematic ev, achieving a nearly identical uncertainty compared to the previous strontium record set by the JILA SrII optical lattice clock at 2. ; Leopardi, Holly; Beloy, Kyle. 8 ), and measure their frequency ratios with fractional uncertainties at or below 8 × 10. -The 8th International Comparison of Absolute Gravimeters 2009: the first Key Comparison (CCM. I did my Ph. Issue 41 |. 130, 113203 – Published 15 March 2023 Tobias Bothwell1 , Colin J. 22, 2021 (GLOBE NEWSWIRE) -- Nearly 2,000 participants, along with thousands of spectators, turned out in Boulder on October 10 for the first-ever Boulderthon ® marathon. Edward Marti,1,2 Andrei Derevianko,3 and Jun Ye1 1JILA, National Institute of Standards and Technology and. October 30, 2023 (87 years old) View obituary. (Aug 20, 2020) Published in: Phys. 01095. Colin J. Bodine,JILA physicists have measured Albert Einstein's theory of general relativity, or more specifically, the effect called time dilation, at the smallest scale ever, showing that two tiny atomic clocks. time, time-interval, and frequency signals, which are based on an ensemble of atomic clocks and frequency. Here we operate a network of optical clocks based on 27Al+ (ref. -Comparative Study of Time Scale Algorithms Patrizia Tavella and Claudine Thomas-Recent citations Joint Timekeeping of Navigation Satellite Constellation with Inter-Satellite Links Leyuan Sun et al-- Michal Marszalec et al SIM Time Scale Jose Mauricio Lopez-Romero et al-Precision Metrology Meets Cosmology: Improved Constraints on Ultralight Dark Matter from Atom-Cavity Frequency Comparisons Colin J. Existing timescales, including those incorporating optical frequency standards, rely. Researchers are using quantum-degenerate atomic gases (1–6), ultracold polar molecules (7–9), and ensembles of trapped ions (10, 11) to realize previously unidentified quantum phases of matter and simulate complex condensed matter. Ever improving precision and accuracy in atomic clocks are inextricably linked to discovery, with each new decade exploring smaller energy scales. Sherman, 3 Judah Levine, 3 Jian Yao, 3, y Jun Ye, 1, z and Eric Oelker 1, x 1 JILA, NIST. Einstein's theory of general relativity states that clocks at different gravitational potentials tick at different rates - an effect known as the gravitational redshift. Robinson, Eric Oelker, Alexander Staron, Jun Ye. The relative strength of the on-site and off-site interactions can be tuned to achieve a zero. Nature. Kennedy; Jun Ye; Article 16 Feb 2022. Do you know Cynthia J Bothwell’s phone number? You can try calling Cynthia’s landline phone at (405) 691-0377 or ring her cell phone at (405) 824-7640 . Tobias Bothwell's doctoral thesis presents a novel approach to improve the performance of optical lattice clocks using Wannier-Stark states. “In the next five to ten years, we’re hoping to be able. 08773 [physics. Tobias Bothwell Current Affiliation: NIST Boulder campus . I'm currently a 5th-year physics PhD student in Professor Ana Maria Rey’s theory group at University of Colorado Boulder, USA. Clocks operating at optical frequencies have. Present address: Tech-X Corporation, Boulder, CO 80303, USA. In this week’s issue, Tobias Bothwell, Jun Ye and their colleagues demonstrate this effect at a sub-millimetre scale. atom-ph] pdf links DOI cite claim. Clocks operating at optical. 201302;highest performance atomic clocks ever, they announced Feb. 123, 173903 (2019) – Published 24 October 2019. DOI: 10. Tobias Bothwell (University of Colorado, Boulder) Alexander G Aeppli (University of Colorado, Boulder) Dhruv Kedar (University of Colorado, Boulder) John M Robinson (University of Colorado, Boulder) Eric Oelker (University of Colorado, Boulder, NIST) Alexander Staron (University of Colorado, Boulder) Anjun Chu (JILA) Peiru He. We improve the systematic uncertainty budget in several important ways. Matei. The. Robinson , Sarah L. Tobias Bothwell. A Aeppli, A Chu, T Bothwell, CJ Kennedy, D Kedar, P He, AM Rey, J Ye. Phot. Optical atomic clock comparison through turbulent air. This includes a novel scheme for taming blackbody radiation-induced frequency shifts through active. Bodine and Tobias Bothwell and Samuel M. Thermal imaging of dust hiding the black hole in NGC 1068. Tobias Bothwell. Robinson, Tobias Bothwell, Dhruv Kedar, William R. As illustrated on the cover, the atoms are trapped in pancake-like optical traps and then interrogated by a laser. BODINE et al. et al. Milner,1,* John M. Tew. Carsten Klempt Institut für Quantenoptik,. Dhruv Kedar. As illustrated on the cover, the atoms are trapped in pancake-like optical traps and then interrogated by a laser. Joseph D. Robinson, C. Andrew Ludlow is a physicist and leader of the Neutral Atom Optical Clock Group in the Physical Measurement Laboratory at the National Institute of Standards and Technology in Boulder. Kennedy, 1Eric Oelker, John M. gov (303) 497-3411 Project Status. Twitter Facebook LinkedIn Instagram YouTube Giphy RSS Feed Mailing List. Notably,. Tobias Bothwell. DOI: 10. UW Mentor (s): Boris Blinov. Here we report a new operational regime for 1D OLCs, both resolving the gravitational redshift across our atomic sample and synchronously measuring a fractional frequency uncertainty of 7. Barber and Matthew L. Published in Metrologia 14 June 2019. 6 ), 87 Sr (ref. Marti, G. In this thesis we report a body of research advancing our 1D strontium optical lattice clock (Sr1) to the frontiers of. ] Xiaogang Zhang; Atomic clocks are vital in a wide array of technologies and experiments, including tests of fundamental physics1. Strongly correlated quantum many-body systems have become a major focus of modern science. Milner W. ] Xiaogang Zhang; Atomic clocks are vital in a wide array of technologies and experiments, including tests of fundamental physics1. PDF HTML. Show Abstract. 08773 • DOI: 10. Rev. student Tobias Bothwell and former JILA postdoctoral researcher Colin Kennedy have been honored by NIST's (the National Institute of Standards and Technology) Physical Measurement Laboratory ( PML) with the 2022 Distinguished Associate Awards. Einstein’s theory of general relativity states that clocks at. 1. M. Tobias Bothwell (JILA, Boulder), Dhruv Kedar (JILA, Boulder) et al. Robinson, 1 Colin J. Milner, Wei Zhang, Thomas Legero. Matei, T. E. David Hume is a staff physicist in the Ion Storage Group. edu Received 13 June 2019, revised 29 August 2019 Accepted for publication 2 September 2019 Published 10 October 2019 Abstract We report on an improved systematic evaluation of the JILA SrI optical lattice clock, achieving a nearly identical uncertainty compared to the previous strontium record set by the Evaluation of Lattice Light Shift at Low 10 − 19 Uncertainty for a Shallow Lattice Sr Optical Clock Kyungtae Kim, Alexander Aeppli, Tobias Bothwell, and Jun Ye Phys. Rev. The sum of the statistical and systematic uncertainties (2 methods, 3 clocks) in their frequency ratio measurements were 5. Cesium atoms are laser-cooled to ~300 nK, prepared in the magnetically insensitive m F = 0 state, and launched millimeters upward into free fall [see materials and methods for details (24)]. Our matter-wave interferometer builds upon the setup described previously (7, 23). Dr. Towards this regime, we measure a linear frequency gradient consistent with the gravitational redshift within a single millimetre-scale sample of ultracold strontium. Robinson , Sarah L. , A Wannier-Stark Optical Lattice Clock With Extended Coherence Times, University of Colorado Boulder, 2022. " Resolving the gravitational redshift across a millimetre-scale atomic sample ," Nature, Nature, vol. Martha I. of Physics, University of Colorado Boulder) Colin J Kennedy (JILA, NIST and Dept. We report. Clocks operating at optical frequencies have now. EFTF. Trending Now. Milner, G. bothwell@nist. I am. Tobias Bothwell, Dhruv Kedar, Eric Oelker, John M Robinson, Sarah L Bromley, Weston L Tew, Jun Ye and Colin J Kennedy Open abstract View article , JILA SrI optical lattice clock with uncertainty of PDF , JILA SrI optical lattice clock with uncertainty of Gebre-thesis. Jun Ye. Und Jones. ORCID provides an identifier for individuals to use with their name as they engage in research, scholarship, and innovation activities. See the complete profile on LinkedIn and discover Tobias. Tobias Bothwell, Dhruv Kedar, Eric Oelker, John M. Kennedy; Dhruv Kedar; Peiru He; Ana Maria Rey; Jun Ye. During the clock’s downtime, the maser acts as a freewheeling oscillator that keeps producing a timing signal. All issues. The researchers use a cloud of ultracold strontium atoms, effectively creating a series of atomic clocks. Name: Dan Garland, State: OK, City: Oklahoma City, Zip Code: 73170 and more informationTobias Bothwell [. DOI: 10. 5 --Frequency Ratio Measurements with 18-digit Accuracy Using a Network of Optical Clocks Boulder Atomic Clock Optical Network (BACON) Collaboration1;2: Kyle Beloy 1, Martha I. Rev. The collaboration ran clock comparison experiments from November 2017 through to June 2018. 2022-10-14 | Journal article. The SQuInT meeting has a strong tradition of mixing invited talks from world-class leading researchers with talks by junior researchers across the SQuInT network, to promote an interactive. Milner 1, G. D. Created February 26, 2019, Updated April 7, 2023. atom-ph] pdf links DOI cite claim. Playing career. Tobias Bothwell (JILA, Boulder), Dhruv Kedar (JILA, Boulder) et al. BOULDER, Colo. Dwight R Mcbride. Kennedy Download a PDF of the paper titled JILA SrI Optical Lattice Clock with Uncertainty of $2. gov (303) 497-3411 Project Status. 125, 201302 (2020) – Published 12 November 2020 Synopsis: Optical Clocks Join the Hunt for Dark Matter is off to a great start in her career. In an article published last week in Nature, Tobias Bothwell and collaborators reported having measured the dilation of time—a general relativity prediction— due to gravity in atomic clocks at an unprecedented small scale. An advance in frequency ratio measurements lays the groundwork for future networks of mobile, airborne and remote optical clocks that will be used to test physical laws, perform relativistic geodesy and substantially improve international timekeeping. Hutson and Colin J. 22, 2021 (GLOBE NEWSWIRE) -- Nearly 2,000 participants, along with thousands of spectators, turned out in Boulder on October 10 for the first-ever Boulderthon ® marathon. Bodine 1, Tobias Bothwell 2, Samuel M. Bothwell,. Kyle Beloy is a research scientist in the Time and Frequency Division at NIST. Culver. et al. They will each receive a scholarship of up to $7,500 from the Barry Goldwater Scholarship Foundation. Quantum entanglement of atoms enables precision measurement and frequency metrology beyond the standard quantum limit that is imposed by the quantum projection noise. Alexander Aeppli1†, Anjun Chu1,2†, Tobias Bothwell1†, Colin J. Rev. Robinson, Colin J. DOI: 10. 125 (2020) 20, 201302 • e-Print: 2008. Request PDF | On Sep 2, 2019, Tobias Bothwell and others published JILA SrI optical lattice clock with uncertainty of 2. Colin J Kennedy 1 , Eric Oelker 1 , John M Robinson 1 , Tobias Bothwell 1 , Dhruv Kedar 1 , William R Milner 1 , G Edward Marti 1 2 , Andrei Derevianko 3 , Jun Ye 1. Number 1, February 2019. Here’s how you knowTuesday, June 6, 2023 2:00PM - 2:30PM: E02. 1038/s41566-019-0493-4; edit [2] JILA SrI optical lattice clock with uncertainty of 2. Eliteprospects. 1038/s41586-021-04349-7. 6 imes 10^ {-21} ×10−21. ] Xiaogang Zhang; Atomic clocks are vital in a wide array of technologies and experiments, including tests of fundamental physics1. Presenting Author: Tobias Bothwell, National Institute of Standards and Technology, Boulder. 1126/sciadv. Kennedy,1 Tobias Bothwell,1 Dhruv Kedar,1 Dan G. Laser cooling followed by optical pumping to the m F = ±9/2 stretched nuclear spin states (where m F is the projection of the total angular momentum F along the quantization axis) produced a two-spin Fermi gas with an initial phase space density of 0. These ratios have been evaluated with measurement uncertainties between 6 ×10−18 and 8 ×10−18, making them the most accurate reported. M. 2003. Louis Blues, and Hartford Whalers, and several AHL teams. Edward Marti, Andrei Derevianko and Jun Ye, 12 November 2020, Physical Review Letters. Tobias Bothwell, Samuel M. Tobias Bothwell. Foucault and others published Systematic Effects in Strontium Optical. Fasano 1;5, Tara M. Fortier, 3 Jeffrey A. 08773 [physics. M. ] Xiaogang Zhang; Atomic clocks are vital in a wide array of technologies and experiments, including tests of fundamental physics1. Towards this regime, we measure a linear frequency gradient consistent with the gravitational redshift within a single millimetre-scale sample of ultracold strontium. The author has done significant research in the topic(s): Atomic clock &. bothwell@nist. Kennedy1,2,. Robinson & Eric Oelker & Alexander Staron & Jun Ye, 2022. We do so by combining the best ultrastable lasers in the world with our carefully controlled 1D strontium optical lattice clock. Direct comparison of two spin squeezed optical clocks below the quantum projection noise limitRecently, the dynamical phase transition (DPT) and the nonequilibrium phase transition in transient time scales have been theoretically studied in the transverse-field Ising model with all-to-all interactions ( 7 – 9 ). Kennedy, Alexander Aeppli, Dhruv Kedar, John M. Rev. Tobias Bothwell (University of Colorado, Boulder) Colin J Kennedy (Quantinuum) John M Robinson (University of Colorado, Boulder) Jun Ye (University of Colorado, Boulder) We report on the experimental progress of the JILA strontium 1D optical lattice clock. View obituary. Tew 1, Jun Ye 1, Colin Kennedy 1 - Show less +4 more • Institutions (1) National Institute of Standards and Technology 1Marti's and Kolkowitz's co-authors on the poster were graduate students Sarah Bromley, Tobias Bothwell, and Andrew Koller; group collaborator Daniel Reed from the University of Birmingham; senior research associate Michael Wall; former research associate Xibo Zhang; and Fellows Ana Maria Rey and Jun Ye. Physics. IOP Publishing open access policy. Tobias Bothwell, Dhruv Kedar, Eric Oelker, John M Robinson, Sarah L Bromley, Weston L Tew, Jun Ye and Colin J Kennedy Open abstract View article PDF. University of Wisconsin–Madison. Robinson 1, Eric Oelker 1,3, Alexander Staron 1, and Jun Ye 1,*Inside Ye's new clock are 100,000 strontium atoms, layered on top of each other like a stack of pancakes, in total about a millimeter high. Milner, 1, John M. Top 5 Men. Tew. Kennedy ,1 Eric Oelker,1,* John M. Fellow of JILA Fellow of NIST Professor Adjoint, Department of Physics. Robinson,1 Colin J. Lett. adc9242. Augustyn, Sabrina D. , in preparation (2021). As a member of the Sr1 group I work on pushing the frontiers of accuracy and precision. Kennedy • e-Print: 2201. 4 MB. Tobias Bothwell, Dhruv Kedar, Eric Oelker. Europe PMC is an archive of life sciences journal literature. Rev. “We haven’t done it between independent clocks yet,” says Tobias Bothwell, the study’s lead author. Jun Ye. Tobias Bothwell et al. Kennedy 1,2, Alex ander Aeppli 1, D hruv Kedar 1, John M. A locked padlock) or means you’ve safely connected to the . Edward Marti 1,2, Andrei Derevianko 3, and Jun Ye 1. Bothwell, T. At ultracold temperatures, the Pauli exclusion principle suppresses collisions between identical fermions. More information: Tobias Bothwell et al, Resolving the gravitational redshift within a millimeter atomic sample. Robinson,1 Tobias Bothwell,1 Dhruv Kedar,1 William R. , Oct. Martin Boyd Current Affiliation: AOSense, Inc. Bothwell, D. Research Project: Quantum Computing with Trapped Ions. They will each receive a scholarship of up to $7,500 from the Barry Goldwater Scholarship Foundation. Entanglement on an optical atomic-clock transition. gov. We perform absolute measurement of the 27 Al + single-ion and 87 Sr neutral lattice clock frequencies at the National Institute of Standards and Technology and JILA at the University of Colorado against a global ensemble of primary frequency standards. In this week’s issue, Tobias Bothwell, Jun Ye and their colleagues demonstrate this effect at a sub-millimetre scale. Group Alumni have gone to pursue graduate studies at Cornell University (Erin Farmer), The University of Washington (James Sloan), The University of Colorado (Tobias Bothwell and Tyler Bishop), The University of Texas at Austin (Joseph Roll), among other places; others work at companies such as Samsung Telecommunications America (Cedric Horvath. This is something that has been going on for a little over 20 years now,” Tobias Bothwell, a doctoral student working with Ye, said. (Aug 20, 2020) Published in: Phys. 1×10−18. Kennedy1,2, Alexander Aeppli1, Dhruv Kedar1, John M. Diane G. ”Tobias Bothwell. PHYSICAL REVIEW RESEARCH 2, 033395 (2020) FIG. The. Sarah Bromley Current Affiliation: Durham University, Department of Physics . ”Kami telah melihat perubahan detak jam pada jarak kira-kira selebar rambut manusia,” katanya. Sterr, F. 10. Tobias Bothwell; Xiaogang Zhang; Atomic clocks are vital in a wide array of technologies and experiments, including tests of fundamental physics1. JILA endorses the six University nodes' policies for ensuring harassment-free environments. Johanna Nyffeler’s peers at other companies are Dana Goldenberg, Tobias Bothwell, Zhe Hu, Shelby Hooe, Kenji Shimizu. Bothwell, D. The thesis describes the theoretical and experimental aspects of this technique, as well as its applications to precision metrology and fundamental physics. Tobias Bothwell William Milner Free Space Nathan Newbury Laura Sinclair J-D Deschenes Isaac Khader Martha Bodine Bill Swann Timescale Jeff Sherman Tom Parker Jian Yao The Teams. 1126/sciadv. Upload an image to customize your repository’s social media preview. Phys. Matei ,2 Thomas Legero,2 Uwe Sterr ,2 Fritz Riehle,2 Holly Leopardi,3 Tara M. Mary L Jones. This research is an important step for increasing the. "Resolving the gravitational redshift across a millimetre-scale atomic sample. Tobias Bothwell (University of Colorado, Boulder) Ever improving precision and accuracy in atomic clocks are inextricably linked to discovery, with each new decade exploring smaller energy scales. Room: Ballroom 111 A Chair: Wes Campbell, UCLA. Tobias Bothwell, Colin J. Kennedy Download a PDF of the paper titled JILA SrI Optical Lattice Clock with Uncertainty of $2. Tobias Bothwell. Bothwell. 11. view more. 21. Sk S Culver. Sherman,3 Judah Levine ,3 Jian Yao ,3,† Jun Ye ,1,‡ and Eric Oelker 1,§. Matei,2 Thomas Legero,2 Uwe Sterr,2 Fritz Riehle,2 Holly Leopardi,3 Tara M. Review for this journal. 0×10−18. Articles by Tobias Bothwell Evaluation of Lattice Light Shift at Low ${10}^{ensuremath{-}19}$ Uncertainty for a Shallow Lattice Sr Optical Clock. Lett. 08773 [physics. e-mail: tobias. The design could help scientists detect dark matter. Tobias Bothwell (University of Colorado, Boulder) Colin J Kennedy (Quantinuum) Dhruv Kedar (University of Colorado, Boulder) Peiru He (JILA) Kyungtae Kim (JILA) Ana Maria Rey (JILA) Jun Ye (University of Colorado, Boulder) We present recent experimental work towards understanding and harnessing atomic interactions within a. Otorhinolaryngology, The University of Missouri, Columbia, MO, USA. Abstract. Pricing and ordering. My research interests lie in the theory of quantum simulation, quantum metrology and quantum information in the context of AMO and condensed. Dhruv Kedar. Kennedy, 1Eric Oelker, John M. arXiv:2109. Oelker, William R. E02 Invited Live Streamed Deborah Jin Award for Outstanding Doctoral Thesis Research in Atomic, Molecular, or Optical Physics Session. 1 JILA, National Institute of Standards and Technology and University of Colorado, Boulder, Colorado 80309-0440, USA Mathias Bellaiche of Fayetteville and Tobias Bothwell of Oklahoma City are among 271 students in the nation to be named as Goldwater Scholars. “We have seen a shift in the ticking of a clock at a distance around the width of a human hair,” he told Live Science. Jeff Sherman is a Supervisory Physicist at the National Institute of Standards and Technology. Tobias Bothwell (JILA, Boulder), Dhruv Kedar (JILA, Boulder) et al. Show more detail. Fortier, Physical Review Letters 123. Mid-infrared observations of the dusty structures of the galaxy NGC 1068. pdf 7. The. Bio: Tobias Bothwell is a academic researcher at University of Colorado Boulder who has co-authored 20 publication(s) receiving 1004 citation(s). Anesthesiology. Number 3, June 2019. Q: What are your physics/science interests? I am interested in quantum computing but am still exploring different areas of physics. Fortier ,. 1038/s41566-019-0493-4 Corpus ID: 91183269; Optical clock intercomparison with $6 imes 10^{-19}$ precision in one hour @inproceedings{Oelker2019OpticalCI, title={Optical clock intercomparison with $6 imes 10^{-19}$ precision in one hour}, author={Eric Oelker and Ross B. e-mail: tobias. The interplay of magnetic exchange interactions and tunneling underlies many complex quantum phenomena observed in real materials. 13, 714 (2019). Jezreal Apple. 14694 [physics. Bothwell, D. Q: What are your physics/science interests? I am interested in quantum computing but am still exploring different areas of physics. Marti, G. 767 N Mary Ave Sunnyvale, CA 94085-2909 . Kyungtae Kim, Alexander Aeppli, Tobias Bothwell, and Jun Ye Phys. ] Xiaogang Zhang; Atomic clocks are vital in a wide array of technologies and experiments, including tests of fundamental physics1. In the women’s race, Jessica Allen took top honours by finishing the race in 01:19:14 . For more detailed information regarding the University of Colorado policies, please read the Discrimination and Harassment Policy and Procedures. Volume 8 |. , J. TOPICS; Electrons; Laser; Home Science. Show more detail. Request PDF | On Jul 7, 2021, Y. “But this is the first piece showing that this level of precision is attainable. An optical lattice. Created April 27, 2023, Updated July 3, 2023 HEADQUARTERS 100 [email protected]/s41586-022-05479-2. Over an eight month period multiple measurements yielded the mean optical atomic transition. Demonstration of a Timescale Based on a Stable Optical Carrier William R. Tobias Bothwell 1,3 5, Dhruv Kedar1,3, Eric Oelker , John M Robinson , Sarah L Bromley 1,4, Weston L Tew 2, Jun Ye and Colin J Kennedy 1 JILA, National Institute of Standards and Technology and. A novel nanofiber technique shows that the evolution of light inside an asymmetric microcavity is engineered by regular orbits and two distinct evolution pathways emerge: regular-chaotic and pure-chaotic channels. Kedar, D. Science Advances. Kennedy. Kennedy 1,2, Alex ander Aeppli 1, D hruv Kedar 1, John M. Kennedy,1 Tobias Bothwell,1 Dhruv Kedar,1 Dan G. UNIVERSITY. “We haven’t done it between independent clocks yet,” says Tobias Bothwell, the study’s lead author. 049502. Tobias Bothwell, Colin J. bothwell [at] nist. Tobias Bothwell.