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Mason Marshall, Daniel Rodriguez Castillo, Willa Dworschack, Alexander Aeppli, Kyungtae Kim, Dahyeon Lee, William Warfield, Nicholas Nardelli, Tara Fortier, Jun Ye, David Ray Leibrandt, David Hume
We report a single-ion optical atomic clock with fractional frequency uncertainty of 5.5 x 10^-19 and frequency stability of 3.5 x 10^-16/sqrttau/s}, based on quantum logic spectroscopy of a single 27Al+ ion. A co-trapped 25Mg+ ion provides sympathetic
Chowdhury Abrar Faiyaz, Endre Takacs, Timothy Burke, FNU Dipti, Galen O'Neil, Adam Hosier, Hunter Staiger, Joseph Tan, Yuri Ralchenko
We show the effects of ladder ionization and hyperfine quenching on charge state distributions and spectral features of ions in electron beam ion trap (EBIT) devices. Ladder ionization with intermediate excitation of metastable states proceeds at lower
Kyle Beloy, Benjamin Hunt, Roger Brown, Tobias Bothwell, Youssef Hassan, Jacob Siegel, Tanner Grogan, Andrew Ludlow
We consider the Zeeman shift in Rydberg atoms induced by room-temperature blackbody radiation (BBR). BBR shifts to the Rydberg levels are dominated by the familiar BBR Stark shift. However, the BBR Stark shift and the BBR Zeeman shift exhibit different
Christina Schwemmbauer, Adriana Lita, Yonit Hochberg, Axel Lindner, Friederike Januschek, Manuel Meyer, Benjamin Lehmann
We propose the use of transition-edge sensor (TES) single-photon detectors as a simultaneous target and sensor for direct dark matter searches, and report results from the first search of this kind. We perform a 489 h science run with a TES device
Charles Patrick, Noah Schlossberger, Daniel Hammerland, Nikunjkumar Prajapati, Tate McDonald, Samuel Berweger, Rajavardhan Talashila, Alexandra Artusio-Glimpse, Christopher Holloway
We demonstrate the imaging of localized surface electric (E) field effects on the atomic spectrum in a vapor cell used in Rydberg atom-based sensors. These surface E-fields can result from an induced electric charge distribution on the surface. Induced
Kaixin Huang, Demitry Farfurnik, Alireza Seif, Mohammad Hafezi, Yi-Kai Liu
Qubit noise spectroscopy is an important tool for the experimental investigation of open quantum systems. However, conventional techniques for implementing noise spectroscopy are time-consuming, because they require multiple measurements of the noise
Rubidium vapor cells play a key role in contemporary quantum optics since they have strong nonlinear interactions with low-power incident laser light. The simplest nonlinear interaction is the Kerr effect. Although most calculations concentrate on the
David La Mantia, Mingxin Lei, Nikunjkumar Prajapati, Noah Schlossberger, Matthew Simons, Christopher Holloway, Julia Scherschligt, Stephen Eckel, Eric Norrgard
We demonstrate a blackbody radiation thermometer based on optically excited rubidium atoms in a vapor cell. Operating as a calibrated contact thermometer from 308K to 343 K, we realize temperature uncertainty as low as 0.04 %, and statistical temperature
Hui Li, Eite Tiesinga, Ming Li, Svetlana Kotochigova
We study spin-dynamics and quantum magnetism with ultracold highly-magnetic atoms. In particular, we focus on the interactions among rare-earth atoms localized in a site of an optical-lattice potential, modeled as a cylindrically symmetric harmonic
Yang Yang, FNU Dipti, Amy Gall, Nancy Brickhouse, Hunter Staiger, Galen O'Neil, Paul Szypryt, Adam Foster, David Schultz, Aung Naing, Joseph Tan, Daniel Swetz, Michael Fogle, Randall Smith, Yuri Ralchenko, Endre Takacs
Charge-exchange recombination with neutral atoms significantly influences the ionization balance in electron beam ion traps (EBIT) because its cross section is relatively large compared to cross sections of electron collision induced processes. Modeling
Daniele Binosi, Giovanni Garberoglio, Allan Harvey
This is a Response to a Comment concerning apparent differences between our published calculations for the third virial coefficient of Helium-3 at cryogenic temperatures and some experimental data sources.
In this manuscript, we use a dual electro-optic comb system (EO-OFC) and a differential chirped-pulse down conversion technique to study the R(6) manifold of the 2ν3 band (1645 nm) of methane at low pressure ( 1 kPa). In the frequency domain, the EO-OFC
Mingxin Lei, Stephen Eckel, Eric Norrgard, Nikunjkumar Prajapati, Alexandra Artusio-Glimpse, Matthew Simons, Christopher Holloway
Electrometry based on electromagnetically induced transparency (EIT) in alkali Rydberg vapor cells may suffer reduced sensitivity due to spurious line broadening effects, caused by surface charges, contaminant gases, or other manufacturing defects. In
A large class of experiments consists of measuring the parameters of physical models. In these experiments, the goal is to learn about these parameters as accurately and, often, quickly as possible. Adaptive experiment design works by yielding instrument
Stephen Eckel, Daniel Barker, James A. Fedchak, Jacek Klos, Julia Scherschligt, Eite Tiesinga
We theoretically investigate the effect of "glancing" collisions on the ultra-high-vacuum pressure readings of the cold-atom vacuum standard (CAVS), based on either ultracold $^7$Li or $^87}$Rb atoms. Here, glancing collisions are those collisions between
Thermal noise is the predominant instability in the provision of ultrastable laser frequency by reference to a cavity. Reducing the thermal-noise limit of a cavity means either making it larger to spread thermal fluctuations, reducing the sensitivity of
Joseph Hodges, Zachary Reed, Katarzyna Bielska, Manfred Birk, Ruimin Guo, Gang Li, Jeong Sik Lim, Daniel Lisak, Georg Wagner
We present primary spectroscopic measurements of line intensities in the 3-0 vibrational band of 12C16O. This international measurement campaign was organized under the auspices of the Consultative Committee for Amount of Substance (CCQM) and involved six
Noah Schlossberger, Andrew Rotunno, Stephen Eckel, Eric Norrgard, Dixith Manchaiah, Nikunjkumar Prajapati, Alexandra Artusio-Glimpse, Samuel Berweger, Matthew Simons, Dangka Shylla, William Watterson, Charles Patrick, Adil Meraki, Rajavardhan Talashila, Amanda Younes, David La Mantia, Christopher Holloway
Rydberg states of alkali-metal atoms are highly sensitive to electromagnetic radiation in the GHz-to-THz regime because their transitions have large electric dipole moments. Consequently, environmental blackbody radiation (BBR) can couple Rydberg states to