Walsworth, Ronald
Senior Physicist
Walsworth, Ronald
Senior Physicist
Ron Walsworth leads an interdisciplinary research group that develops precision measurement tools and applies them to problems in both the physical and life sciences. Current areas of research include: new approaches to the search for dark matter; studying the Sun as a star to aid detection of Earth-like planets around other stars; and the development of quantum sensors with applications ranging from condensed matter physics to neuroscience to Earth & planetary science.
Positions
- Senior Physicist, Smithsonian Astrophysical Observatory
- Senior Lecturer, Harvard University
Background And Education
Education And Training
- B.S., Duke University
- Ph.D., Harvard University
Awards And Honors
- Smithsonian Scholarly Studies Award, conferred by Smithsonian Scholarly Studies Awards, 2018
- Francis M. Pipkin Award, conferred by American Phsical Society, 2005
Public Biography
- Ron Walsworth is a Senior Physicist at the Smithsonian Astrophysical Observatory and also a part-time faculty member in Harvard University Physics Department. He leads an interdisciplinary research group that develops precision measurement tools and applies them to problems in both the physical and life sciences. Current areas of research include: new approaches to the search for dark matter; studying the Sun as if it were a star in order to aid the astronomical detection of Earth-like planets around other stars; and the development of quantum sensors and novel NMR tools, with diverse applications ranging from condensed matter physics to neuroscience to Earth & planetary science.
Publications
Selected Publications
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Article
- Phillips, David F., Ravi, Aakash, Ebadi, Reza, and Walsworth, Ronald L. 2021. "Milky Way Accelerometry via Millisecond Pulsar Timing." Physical Review Letters 126:141103. https://doi.org/10.1103/PhysRevLett.126.141103 2021
- Marshall, Mason C., Phillips, David F., Turner, Matthew J., Ku, Mark J. H., Zhou, Tao, Delegan, Nazar, Heremans, F. Joseph, Holt, Martin V., and Walsworth, Ronald L. 2021. "Scanning X-Ray Diffraction Microscopy for Diamond Quantum Sensing." Physical Review Applied, 054032. 16, https://doi.org/10.1103/PhysRevApplied.16.054032. 2021
- Ebadi, Reza, Mathur, Anubhav, Tanin, Erwin H., Tailby, Nicholas D., Marshall, Mason C., Ravi, Aakash, Trubko, Raisa, Fu, Roger R., Phillips, David F., Rajendran, Surjeet, and Walsworth, Ronald L. 2021. "Ultraheavy dark matter search with electron microscopy of geological quartz." Physical Review D, 015041. 104, https://doi.org/10.1103/PhysRevD.104.015041. 2021
- Miklos, M., Milbourne, Timothy W., Haywood, Raphaëlle D., Phillips, David F., Saar, Steven H., Meunier, N., Cegla, H. M., Dumusque, X., Langellier, Nicholas, Maldonado, J., Malavolta, L., Mortier, A., Thompson, S., Watson, C. A., Cecconi, M., Cosentino, R., Ghedina, A., Li, C. -H, López-Morales, Mercedes, Molinari, E., Poretti, Ennio, Sasselov, Dimitar, Sozzetti, A., and Walsworth, Ronald L. 2020. "Testing the Spectroscopic Extraction of Suppression of Convective Blueshift." The Astrophysical Journal, 888 117. https://doi.org/10.3847/1538-4357/ab59d5. 2020
- Thompson, A. P. G., Watson, C. A., Haywood, Raphaëlle D., Costes, J. C., de Mooij, E., Collier Cameron, A., Dumusque, X., Phillips, David F., Saar, Steven H., Mortier, A., Milbourne, T. W., Aigrain, S., Cegla, H. M., Charbonneau, David, Cosentino, R., Ghedina, A., Latham, David W., López-Morales, M., Micela, G., Molinari, E., Poretti, E., Sozzetti, A., Thompson, S., and Walsworth, Ronald L. 2020. "The spectral impact of magnetic activity on disc-integrated HARPS-N solar observations: exploring new activity indicators." Monthly Notices of the Royal Astronomical Society, 494 4279–4290. https://doi.org/10.1093/mnras/staa1010. 2020
- Milbourne, Timothy W., Haywood, Raphaëlle D., Phillips, David F., Saar, Steve H., Cegla, H. M., Cameron, A. C., Costes, J., Dumusque, X., Langellier, Nicholas, Latham, David W., Maldonado, J., Malavolta, L., Mortier, A., Palumbo, Michael L.,III, Thompson, S., Watson, C. A., Bouchy, F., Buchschacher, N., Cecconi, M., Charbonneau, David, Cosentino, R., Ghedina, A., Glenday, Alexander G., Gonzalez, M., Li, C. -H et al. 2019. "HARPS-N Solar RVs Are Dominated by Large, Bright Magnetic Regions." The Astrophysical Journal, 874 107. https://doi.org/10.3847/1538-4357/ab064a. 2019
- Imaging crystal stress in diamond using ensembles of nitrogen-vacancy centers. Physical Review B. 100:174103. 2019
- Improved Quantum Sensing with a Single Solid-State Spin via Spin-to-Charge Conversion. Physical Review Applied. 11:064003. 2019
- Principles and techniques of the quantum diamond microscope. Nanophotonics. 8:209. 2019
- Ravi, Aakash, Langellier, Nicholas, Phillips, David F., Buschmann, Malte, Safdi, Benjamin R., and Walsworth, Ronald L. 2019. "Probing Dark Matter Using Precision Measurements of Stellar Accelerations." Physical Review Letters 123:091101. https://doi.org/10.1103/PhysRevLett.123.091101 2019
- Collier Cameron, A., Mortier, A., Phillips, David, Dumusque, X., Haywood, Raphaëlle D., Langellier, Nicholas, Watson, C. A., Cegla, H. M., Costes, J., Charbonneau, David, Coffinet, A., Latham, David W., Lopez-Morales, Mercedes, Malavolta, L., Maldonado, J., Micela, G., Milbourne, Timothy, Molinari, Emilio, Saar, S. H., Thompson, S., Buchschacher, Nicholas, Cecconi, M., Cosentino, R., Ghedina, A., Glenday, Alexander G. et al. 2019. "Three years of Sun-as-a-star radial-velocity observations on the approach to solar minimum." Monthly Notices of the Royal Astronomical Society, 487 1082–1100. https://doi.org/10.1093/mnras/stz1215. 2019
- Fundamental Precision Bounds for Three-Dimensional Optical Localization Microscopy with Poisson Statistics. Physical Review Letters. 121:023904. 2018
- Control and local measurement of the spin chemical potential in a magnetic insulator. Science. 357:195-198. 2017
- Diamond-Based Magnetic Imaging with Fourier Optical Processing. Physical Review Applied. 8:054003. 2017
- Evaluating the paleomagnetic potential of single zircon crystals using the Bishop Tuff. Earth and Planetary Science Letters. 458:1-13. 2017
- Nanodiamond-enhanced MRI via in situ hyperpolarization. Nature Communications. 8:15118. 2017
- Gravitational wave detection with optical lattice atomic clocks. Physical Review D. 94:124043. 2016
- Nuclear magnetic resonance detection and spectroscopy of single proteins using quantum logic. Science. 351:836-841. 2016
- Probing scalar coupling differences via long-lived singlet states. Journal of Magnetic Resonance. 262:42-49. 2016
- Fourier magnetic imaging with nanoscale resolution and compressed sensing speed-up using electronic spins in diamond. Nature Nanotechnology. 10:859-864. 2015
- Dumusque, Xavier, Glenday, Alex, Phillips, David F., Buchschacher, Nicolas, Collier Cameron, Andrew, Cecconi, Massimo, Charbonneau, David, Cosentino, Rosario, Ghedina, Adriano, Latham, David W., Li, Chih-Hao, Lodi, Marcello, Lovis, Christophe, Molinari, Emilio, Pepe, Francesco, Udry, Stéphane, Sasselov, Dimitar, Szentgyorgyi, Andrew H., and Walsworth, Ronald L. 2015. "HARPS-N Observes the Sun as a Star." The Astrophysical Journal Letters, 814 L21. https://doi.org/10.1088/2041-8205/814/2/L21. 2015
- Nanoscale NMR spectroscopy and imaging of multiple nuclear species. Nature Nanotechnology. 10:129-134. 2015
- All-Optical Sensing of a Single-Molecule Electron Spin. Nano Letters. 14:6443-6448. 2014
- Atom-like crystal defects: From quantum computers to biological sensors. Physics Today. 67:38-43. 2014
- Magnetic Resonance Detection of Individual Proton Spins Using Quantum Reporters. Physical Review Letters. 113:197601. 2014
- Subnanometre resolution in three-dimensional magnetic resonance imaging of individual dark spins. Nature Nanotechnology. 9:279-284. 2014
- Dressed-State Resonant Coupling between Bright and Dark Spins in Diamond. Physical Review Letters. 110:157601. 2013
- Nanoscale magnetic imaging of a single electron spin under ambient conditions. Nature Physics. 9:215-219. 2013
- Preparation of Nuclear Spin Singlet States Using Spin-Lock Induced Crossing. Physical Review Letters. 111:173002. 2013
- A robust scanning diamond sensor for nanoscale imaging with single nitrogen-vacancy centres. Nature Nanotechnology. 7:320-324. 2012
- Phillips, David F., Glenday, Alexander G., Li, Chih-Hao, Cramer, Claire, Furesz, Gabor, Chang, Guoqing, Benedick, Andrew J., Chen, Li-Jin, Kärtner, Franz X., Korzennik, Sylvain, Sasselov, Dimitar, Szentgyorgyi, Andrew H., and Walsworth, Ronald L. 2012. "Calibration of an astrophysical spectrograph below 1 m/s using a laser frequency comb." Optics Express, 20 13711. https://doi.org/10.1364/OE.20.013711. 2012
- Phillips, David F., Glenday, Alex, Li, Chih-Hao, Furesz, Gabor, Benedick, Andrew J., Chang, Guoqing N., Chen, Li-Jin, Korzennik, Sylvain, Sasselov, Dimitar, Kaertner, Franz X., Szentgyorgyi, Andrew H., and Walsworth, Ronald L. 2012. "Calibration of an echelle spectrograph with an astro-comb: a laser frequency comb with very high repetition rate." Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series, 8446. https://doi.org/10.1117/12.926465. 2012
- Coherent, Mechanical Control of a Single Electronic Spin. Nano Letters. 12:3920-3924. 2012
- Li, Chih-Hao, Chang, Guoqing, Glenday, Alexander G., Langellier, Nicholas, Zibrov, Alexander, Phillips, David F., Kärtner, Franz X., Szentgyorgyi, Andrew H., and Walsworth, Ronald L. 2012. "Conjugate Fabry-Perot cavity pair for improved astro-comb accuracy." Optics Letters, 37 3090. https://doi.org/10.1364/OL.37.003090. 2012
- Enhanced metrology using preferential orientation of nitrogen-vacancy centers in diamond. Physical Review B. 86:121202. 2012
- Enhanced solid-state multispin metrology using dynamical decoupling. Physical Review B. 86:45214. 2012
- Li, Chih-Hao, Glenday, Alexander G., Phillips, David F., Furesz, Gabor, Langellier, Nicholas, Webber, Matthew, Zibrov, Alexander, Benedick, Andrew J., Chang, Guoqing, Chen, Li-Jin, Sasselov, Dimitar, Kärtner, Franz, Szentgyorgyi, Andrew H., and Walsworth, Ronald L. 2012. "Green astro-comb for HARPS-N." Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series, 8446. https://doi.org/10.1117/12.925799. 2012
- Glenday, Alexander G., Phillips, David F., Webber, Matthew, Li, Chih-Hao, Furesz, Gabor, Chang, Guoqing, Chen, Li-Jin, Kärtner, Franz X., Sasselov, Dimitar D., Szentgyorgyi, Andrew H., and Walsworth, Ronald L. 2012. "High-resolution Fourier transform spectrograph for characterization of echelle spectrograph wavelength calibrators." Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series, 8446 96. https://doi.org/10.1117/12.926366. 2012
- Klein, M., Hohensee, M., Phillips, D. F., and Walsworth, Ronald L. 2011. "Electromagnetically induced transparency in paraffin-coated vapor cells." Physical Review A 83:13826. https://doi.org/10.1103/PhysRevA.83.013826 2011
- Magnetic field imaging with nitrogen-vacancy ensembles. New Journal of Physics. 13:5021. 2011
- Quantum control of proximal spins using nanoscale magnetic resonance imaging. Nature Physics. 7:687-692. 2011
- Coherence of nitrogen-vacancy electronic spin ensembles in diamond. Physical Review B. 82:201201. 2010
- Hohensee, Michael A., Stanwix, Paul L., Tobar, Michael E., Parker, Stephen R., Phillips, David F., and Walsworth, Ronald L. 2010. "Improved constraints on isotropic shift and anisotropies of the speed of light using rotating cryogenic sapphire oscillators." Physical Review D 82:76001. https://doi.org/10.1103/PhysRevD.82.076001 2010
- Xiao, Yanhong, Wang, Tun, Baryakhtar, Maria, van Camp, Mackenzie, Crescimanno, Michael, Hohensee, Michael, Jiang, Liang, Phillips, David F., Lukin, Mikhail D., Yelin, Susanne F., and Walsworth, Ronald L. 2009. "Electromagnetically induced transparency with noisy lasers." Physical Review A 80:41805. https://doi.org/10.1103/PhysRevA.80.041805 2009
- Hohensee, Michael A., Lehnert, Ralf, Phillips, David F., and Walsworth, Ronald L. 2009. "Limits on isotropic Lorentz violation in QED from collider physics." Physical Review D 80:36010. https://doi.org/10.1103/PhysRevD.80.036010 2009
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Conference Paper
- Phillips, D. F., Walsworth, Ronald L., and Kostelecky, Alan. 2014. "Application of Laser Frequency Combs and Nitrogen Vacancy Diamond Magnetometers to Searches for New Physics." In , , 249-251. https://doi.org/10.1142/9789814566438_0063 2014
Contact
Location
- Smithsonian Astrophysical Observatory Academic Department
