B. E. Sauer
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View article: Slowing YbF molecules using radiation pressure
Slowing YbF molecules using radiation pressure Open
We report radiation pressure slowing of YbF molecules to low velocity. In YbF, laser slowing is hindered by leaks out of the optical cycle attributed to low-lying metastable electronic states arising from inner-shell excitation. We bring t…
View article: Low-noise environment for probing fundamental symmetries
Low-noise environment for probing fundamental symmetries Open
We present the design and characterization of a low-noise environment for measuring the electron’s electric dipole moment (EDM) with a beam of molecules. To minimize magnetic Johnson noise from metals, the design features ceramic electric …
View article: Large momentum transfer Raman atom interferometer without <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>k</mml:mi></mml:math>-reversal
Large momentum transfer Raman atom interferometer without -reversal Open
We present a Raman atom interferometer using large momentum transfer without reversing the direction of the effective wave vector (k-reversal). More specifically, we use a microwave π/2 pulse to manipulate the spin state of Rb87 atoms befo…
View article: A Prototype Atom Interferometer to Detect Dark Matter and Gravitational Waves
A Prototype Atom Interferometer to Detect Dark Matter and Gravitational Waves Open
The AION project has built a tabletop prototype of a single-photon long-baseline atom interferometer using the 87Sr clock transition - a type of quantum sensor designed to search for dark matter and gravitational waves. Our prototype detec…
View article: Low-noise environment for probing fundamental symmetries
Low-noise environment for probing fundamental symmetries Open
We present the design and characterization of a low-noise environment for measuring the electron's electric dipole moment (EDM) with a beam of molecules. To minimize magnetic Johnson noise from metals, the design features ceramic electric …
View article: A large-momentum-transfer Raman atom interferometer without $k$-reversal
A large-momentum-transfer Raman atom interferometer without $k$-reversal Open
We present a Raman atom interferometer using large momentum transfer without reversing the direction of the effective wavevector ($k$-reversal). More specifically, we use a microwave $π$/2 pulse to manipulate the spin state of $^{87}$Rb at…
View article: Wavelength modulation laser spectroscopy of N<sub>2</sub>O at 17 <i>µ</i>m
Wavelength modulation laser spectroscopy of N<sub>2</sub>O at 17 <i>µ</i>m Open
Using a mid-infrared quantum cascade laser and wavelength modulation absorption spectroscopy, we measure the frequencies of ro-vibrational transitions of N 2 O in the 17 µ m region with uncertainties below 5 MHz. These lines, corresponding…
View article: Slow molecular beams from a cryogenic buffer gas source
Slow molecular beams from a cryogenic buffer gas source Open
We study the properties of a cryogenic buffer gas source that uses a low-temperature two-stage buffer gas cell to produce very slow beams of ytterbium monofluoride molecules. The molecules are produced by laser ablation inside the cell and…
View article: Wavelength modulation laser spectroscopy of N$_2$O at 17 $μ$m
Wavelength modulation laser spectroscopy of N$_2$O at 17 $μ$m Open
Using a mid-infrared quantum cascade laser and wavelength modulation absorption spectroscopy, we measure the frequencies of ro-vibrational transitions of N$_2$O in the 17 $μ$m region with uncertainties below 5 MHz. These lines, correspondi…
View article: Slow molecular beams from a cryogenic buffer gas source
Slow molecular beams from a cryogenic buffer gas source Open
We study the properties of a cryogenic buffer gas source that uses a low temperature two-stage buffer gas cell to produce very slow beams of ytterbium monofluoride molecules. The molecules are produced by laser ablation inside the cell and…
View article: Centralized design and production of the ultra-high vacuum and laser-stabilization systems for the AION ultra-cold strontium laboratories
Centralized design and production of the ultra-high vacuum and laser-stabilization systems for the AION ultra-cold strontium laboratories Open
This paper outlines the centralized design and production of the ultra-high-vacuum sidearm and laser-stabilization systems for the AION Ultra-Cold Strontium Laboratories. Commissioning data on the residual gas and steady-state pressures in…
View article: Systematic errors arising from polarization imperfections in measurements of the electron's electric dipole moment
Systematic errors arising from polarization imperfections in measurements of the electron's electric dipole moment Open
The electron’s electric dipole moment (eEDM) can be determined by polarizing the spin of an atom or a molecule and then measuring the spin precession frequency in an applied electric field. Radiation is used to polarize the spin and then a…
View article: Systematic errors arising from polarization imperfections in measurements of the electron's electric dipole moment
Systematic errors arising from polarization imperfections in measurements of the electron's electric dipole moment Open
The electron's electric dipole moment (eEDM) can be determined by polarizing the spin of an atom or a molecule and then measuring the spin precession frequency in an applied electric field. Radiation is used to polarize the spin and then a…
View article: Centralised Design and Production of the Ultra-High Vacuum and Laser-Stabilisation Systems for the AION Ultra-Cold Strontium Laboratories
Centralised Design and Production of the Ultra-High Vacuum and Laser-Stabilisation Systems for the AION Ultra-Cold Strontium Laboratories Open
This paper outlines the centralised design and production of the Ultra-High-Vacuum sidearm and Laser-Stabilisation systems for the AION Ultra-Cold Strontium Laboratories. Commissioning data on the residual gas and steady-state pressures in…
View article: Measuring the nuclear magnetic quadrupole moment in heavy polar molecules
Measuring the nuclear magnetic quadrupole moment in heavy polar molecules Open
Theories that extend the Standard Model of particle physics often introduce new interactions that violate charge-parity (CP) symmetry. Charge-parity-violating effects within an atomic nucleus can be probed by measuring its nuclear magnetic…
View article: An ultracold molecular beam for testing fundamental physics
An ultracold molecular beam for testing fundamental physics Open
We use two-dimensional transverse laser cooling to produce an ultracold beam of YbF molecules. Through experiments and numerical simulations, we study how the cooling is influenced by the polarization configuration, laser intensity, laser …
View article: Collisions in a dual-species magneto-optical trap of molecules and atoms
Collisions in a dual-species magneto-optical trap of molecules and atoms Open
We study inelastic collisions between CaF molecules and 87 Rb atoms in a dual-species magneto-optical trap. The presence of atoms increases the loss rate of molecules from the trap. By measuring the loss rates and density distributions, we…
View article: Data presented in "An ultracold molecular beam for testing fundamental physics"
Data presented in "An ultracold molecular beam for testing fundamental physics" Open
Data presented in "An ultracold molecular beam for testing fundamental physics". The original paper can be found at https://doi.org/10.1088/2058-9565/ac107e. This is the data underlying the simulations and the experimental results.
View article: Data presented in "An ultracold molecular beam for testing fundamental physics"
Data presented in "An ultracold molecular beam for testing fundamental physics" Open
Data presented in "An ultracold molecular beam for testing fundamental physics". The original paper can be found at https://doi.org/10.1088/2058-9565/ac107e. This is the data underlying the simulations and the experimental results.
View article: Collisions between Ultracold Molecules and Atoms in a Magnetic Trap
Collisions between Ultracold Molecules and Atoms in a Magnetic Trap Open
We prepare mixtures of ultracold CaF molecules and Rb atoms in a magnetic trap and study their inelastic collisions. When the atoms are prepared in the spin-stretched state and the molecules in the spin-stretched component of the first rot…
View article: Data presented in "Collisions Between Ultracold Molecules and Atoms in a Magnetic Trap"
Data presented in "Collisions Between Ultracold Molecules and Atoms in a Magnetic Trap" Open
Data presented in our paper "Collisions Between Ultracold Molecules and Atoms in a Magnetic Trap"
View article: Data presented in "Collisions Between Ultracold Molecules and Atoms in a Magnetic Trap"
Data presented in "Collisions Between Ultracold Molecules and Atoms in a Magnetic Trap" Open
Data presented in our paper "Collisions Between Ultracold Molecules and Atoms in a Magnetic Trap"
View article: Methods for measuring the electron’s electric dipole moment using ultracold YbF molecules
Methods for measuring the electron’s electric dipole moment using ultracold YbF molecules Open
Measurements of the electron’s electric dipole moment (eEDM) are demanding tests of physics beyond the standard model. We describe how ultracold YbF molecules could be used to improve the precision of eEDM measurements by two to three orde…
View article: Methods for measuring the electron EDM using ultracold YbF molecules
Methods for measuring the electron EDM using ultracold YbF molecules Open
Measurements of the electron's electric dipole moment (eEDM) are demanding tests of physics beyond the Standard Model. We describe how ultracold YbF molecules could be used to improve the precision of eEDM measurements by two to three orde…
View article: AION: An Atom Interferometer Observatory and Network
AION: An Atom Interferometer Observatory and Network Open
We outline the experimental concept and key scientific capabilities of AION (Atom Interferometer Observatory and Network), a proposed UK-based experimental programme using cold strontium atoms to search for ultra-light dark matter, to expl…
View article: Long Rotational Coherence Times of Molecules in a Magnetic Trap
Long Rotational Coherence Times of Molecules in a Magnetic Trap Open
Polar molecules in superpositions of rotational states exhibit long-range dipolar interactions, but maintaining their coherence in a trapped sample is a challenge. We present calculations that show many laser-coolable molecules have conven…
View article: Data presented in "Long Rotational Coherence Times of Molecules in a Magnetic Trap"
Data presented in "Long Rotational Coherence Times of Molecules in a Magnetic Trap" Open
Data presented in our paper "Long Rotational Coherence Times of Molecules in a Magnetic Trap". The files give the data that appears in figures 2 and 3 of the paper.
View article: Data presented in "Long Rotational Coherence Times of Molecules in a Magnetic Trap"
Data presented in "Long Rotational Coherence Times of Molecules in a Magnetic Trap" Open
Data presented in our paper "Long Rotational Coherence Times of Molecules in a Magnetic Trap". The files give the data that appears in figures 2 and 3 of the paper.
View article: Deep Laser Cooling and Efficient Magnetic Compression of Molecules
Deep Laser Cooling and Efficient Magnetic Compression of Molecules Open
We introduce a scheme for deep laser cooling of molecules based on robust dark states at zero velocity. By simulating this scheme, we show it to be a widely applicable method that can reach the recoil limit or below. We demonstrate and cha…