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Journals

Optical clock frequency ratios with uncertainty ≤ 3.2 × 10^−18

Author(s)
Alexander Aeppli, Willa Arthur-Dworschack, Kyle Beloy, Caitlin Berry, Tobias Bothwell, Angela Folz, Tara Fortier, Tanner Grogan, Youssef Hassan, Zoey Zimeng Hu, David Hume, Benjamin Hunt, Kyungtae Kim, Amanda Koepke, Dahyeon Lee, David Ray Leibrandt, Ben Lewis, Andrew Ludlow, Mason Marshall, Nicholas Nardelli, Harikesh Ranganath, Daniel Rodriguez Castillo, Jeffrey Sherman, Jacob Siegel, Suzanne Thornton, William Warfield, Jun Ye
We report high-precision frequency ratio measurements between optical atomic clocks based on 27Al+, 171Yb, and 87Sr. With total fractional uncertainties at or

Photonic integrated circuit optical parametric oscillators

Author(s)
Xiyuan Lu, Robert Gray, Jordan Stone, Selina Zhou, Nicolas Englebert, Alireza Marandi, Kartik Srinivasan
Optical parametric oscillators (OPOs) are versatile nonlinear optical devices for wavelength generation from the visible to the mid-infrared. Recently, OPO

Chirped magneto-optical trap of molybdenum

Author(s)
Sai Naga Manoj Paladugu, Nickolas Pilgram, Stephen Eckel, Eric Norrgard
We have directly loaded a cryogenic beam of molybdenum atoms into a magneto-optical trap. By chirping the detuning of the trapping lasers, we were able to

Detection of molecular hydrogen in a neutron beam lifetime experiment

Author(s)
Jimmy Caylor, Ripan Biswas, Bret Crawford, Maynard Dewey, Nadia Fomin, Geoffrey Greene, Shannon Hoogerheide, Jose Hungria-Negron, Hans Mumm, Jeffrey Nico, Daniel Valete, Fred Wietfeldt, Joseph Zuchegno
One method of determining the free neutron lifetime involves the absolute counting of neutrons and trapped decay protons. In such experiments, a cold neutron

Innocent Until Proven Guilty: The Case for Limiting 'Sequences of Concern' to Those with Demonstrated Pathogenic Function

Author(s)
Gene D. Godbold, Krista Ternus, Kevin Flyangolts, Nicole Wheeler, Michael Parker, Jacob Beal, Peter Carr, KEMPER TALLEY, Caitlin Jagla, Bryan Gemler, Craig Bartling, Rebecca Mackelprang, India Hook-Barnard, James Diggans, Samuel Forry, Sheng Lin-Gibson, Tyler Laird, Todd Treangen, Tessa Alexanian, Gregory Koblentz, Kevin Esvelt, Joshua Gil
Screening synthetic nucleic acid orders for sequences of concern is a necessary part of a healthy biosecurity regime, but it exacts costs for nucleic acid

Broadband pulsed quadrature measurements with calorimeters

Author(s)
Ezad Shojaee, James R. van Meter, Karl Mayer, Scott Glancy, Emanuel Knill
A general one-dimensional quantum optical mode is described by a shape in the time or frequency domain. A fundamental problem is to measure a quadrature

Compatibility of trapped ions and dielectrics at cryogenic temperatures

Author(s)
Margaret Bruff, Lindsay Sonderhouse, Kaitlyn David, Daniel Slichter, Dietrich Leibfried, Jules Stuart
We study the impact of an unshielded dielectric\textemdash here, a bare optical fiber\textemdash on a $^40}$Ca$^+}$ ion held several hundred $\mu$m away in a
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