Zobrazeno 1 - 10
of 60
pro vyhledávání: '"Leopardi, Holly"'
Autor:
Gosalia, Ronakraj K., Aguinaldo, Ryan, Green, Jonathan, Leopardi, Holly, Brereton, Peter, Malaney, Robert
The next generation of space-based networks will contain optical clocks embedded within satellites. To fully realize the capabilities of such clocks, high-precision clock synchronization across the networks will be necessary. Current experiments have
Externí odkaz:
http://arxiv.org/abs/2407.00899
Autor:
Tomio, Hannah, Yang, Guangning, Leopardi, Holly F., Numata, Kenji, Yu, Anthony W., Attar, Andrew, Xu, Xiaozhen, Lu, Wei, Gramling, Cheryl, Sridharan, T. K., Kurczynski, Peter
In this effort, we demonstrate the performance of a highly stable time reference for the proposed Black Hole Explorer (BHEX) mission, a space-based extension to the Event Horizon Telescope (EHT) Very Long Baseline Interferometry (VLBI) project. This
Externí odkaz:
http://arxiv.org/abs/2406.10222
Optical frequency combs are an essential tool for precision metrology experiments ranging in application from remote spectroscopic sensing of trace gases to the characterization and comparison of optical atomic clocks for precision time-keeping and s
Externí odkaz:
http://arxiv.org/abs/2208.12869
Autor:
Kim, May E., McGrew, William F., Nardelli, Nicholas V., Clements, Ethan R., Hassan, Youssef S., Zhang, Xiaogang, Valencia, Jose L., Leopardi, Holly, Hume, David B., Fortier, Tara M., Ludlow, Andrw D., Leibrandt, David R.
Comparisons of high-accuracy optical atomic clocks \cite{Ludlow2015} are essential for precision tests of fundamental physics \cite{Safronova2018}, relativistic geodesy \cite{McGrew2018, Grotti2018, Delva2019}, and the anticipated redefinition of the
Externí odkaz:
http://arxiv.org/abs/2109.09540
Autor:
Newman, Zachary L., Maurice, Vincent, Fredrick, Connor, Fortier, Tara, Leopardi, Holly, Hollberg, Leo, Diddams, Scott A., Kitching, John, Hummon, Matthew T.
We describe a high-performance, compact optical frequency standard based on a microfabricated Rb vapor cell and a low-noise, external cavity diode laser operating on the Rb two-photon transition at 778 nm. The optical standard achieves an instability
Externí odkaz:
http://arxiv.org/abs/2105.00610
Autor:
Bodine, Martha I., Deschênes, Jean-Daniel, Khader, Isaac H., Swann, William C., Leopardi, Holly, Beloy, Kyle, Bothwell, Tobias, Brewer, Samuel M., Bromley, Sarah L., Chen, Jwo-Sy, Diddams, Scott A., Fasano, Robert J., Fortier, Tara M., Hassan, Youssef S., Hume, David B., Kedar, Dhruv, Kennedy, Colin J., Koepke, Amanda, Leibrandt, David R., Ludlow, Andrew D., McGrew, William F., Milner, William R., Nicolodi, Daniele, Oelker, Eric, Parker, Thomas E., Robinson, John M., Romish, Stefania, Schäffer, Stefan A., Sherman, Jeffrey A., Sonderhouse, Lindsay, Yao, Jian, Ye, Jun, Zhang, Xiaogang, Newbury, Nathan R., Sinclair, Laura C.
Publikováno v:
Phys. Rev. Research 2, 033395 (2020)
We use frequency comb-based optical two-way time-frequency transfer (O-TWTFT) to measure the optical frequency ratio of state-of-the-art ytterbium and strontium optical atomic clocks separated by a 1.5 km open-air link. Our free-space measurement is
Externí odkaz:
http://arxiv.org/abs/2006.01306
Autor:
Network, Boulder Atomic Clock Optical, Collaboration, Beloy, Kyle, Bodine, Martha I., Bothwell, Tobias, Brewer, Samuel M., Bromley, Sarah L., Chen, Jwo-Sy, Deschênes, Jean-Daniel, Diddams, Scott A., Fasano, Robert J., Fortier, Tara M., Hassan, Youssef S., Hume, David B., Kedar, Dhruv, Kennedy, Colin J., Khader, Isaac, Koepke, Amanda, Leibrandt, David R., Leopardi, Holly, Ludlow, Andrew D., McGrew, William F., Milner, William R., Newbury, Nathan R., Nicolodi, Daniele, Oelker, Eric, Parker, Thomas E., Robinson, John M., Romisch, Stefania, Schäffer, Stefan A., Sherman, Jeffrey A., Sinclair, Laura C., Sonderhouse, Lindsay, Swann, William C., Yao, Jian, Ye, Jun, Zhang, Xiaogang
Atomic clocks occupy a unique position in measurement science, exhibiting higher accuracy than any other measurement standard and underpinning six out of seven base units in the SI system. By exploiting higher resonance frequencies, optical atomic cl
Externí odkaz:
http://arxiv.org/abs/2005.14694
Autor:
Nakamura, Takuma, Davila-Rodriguez, Josue, Leopardi, Holly, Sherman, Jeff A., Fortier, Tara M., Xie, Xiaojun, Campbell, Joe C., McGrew, William F., Zhang, Xiaogang, Hassan, Youssef S., Nicolodi, Daniele, Beloy, Kyle, Ludlow, Andrew D., Diddams, Scott A., Quinlan, Franklyn
Optical atomic clocks are poised to redefine the SI second, thanks to stability and accuracy more than one hundred times better than the current microwave atomic clock standard. However, the best optical clocks have not seen their performance transfe
Externí odkaz:
http://arxiv.org/abs/2003.02923
Autor:
Olson, Judith, Fox, Richard W., Fortier, Tara M., Sheerin, Todd F., Brown, Roger C., Leopardi, Holly, Stoner, Richard E., Oates, Chris W., Ludlow, Andrew D.
We demonstrate Ramsey-Bord\'e (RB) atom interferometry for high performance laser stabilization with fractional frequency instability $<2 \times 10^{-16}$ for timescales between 10 and 1000s. The RB spectroscopy laser interrogates two counterpropagat
Externí odkaz:
http://arxiv.org/abs/1907.06774
Autor:
Milner, William R., Robinson, John M., Kennedy, Colin J., Bothwell, Tobias, Kedar, Dhruv, Matei, Dan G., Legero, Thomas, Sterr, Uwe, Riehle, Fritz, Leopardi, Holly, Fortier, Tara M., Sherman, Jeffrey A., Levine, Judah, Yao, Jian, Ye, Jun, Oelker, Eric
Publikováno v:
Phys. Rev. Lett. 123, 173201 (2019)
We demonstrate a time scale based on a phase stable optical carrier that accumulates an estimated time error of $48\pm94$ ps over 34 days of operation. This all-optical time scale is formed with a cryogenic silicon cavity exhibiting improved long-ter
Externí odkaz:
http://arxiv.org/abs/1907.03184