David C. Moore
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View article: A Spin-Based Pathway to Testing the Quantum Nature of Gravity
A Spin-Based Pathway to Testing the Quantum Nature of Gravity Open
A key open problem in physics is the correct way to combine gravity (described by general relativity) with everything else (described by quantum mechanics). This problem suggests that general relativity and possibly also quantum mechanics …
View article: Ultra-pure Nickel for Structural Components of Low-Radioactivity Instruments
Ultra-pure Nickel for Structural Components of Low-Radioactivity Instruments Open
The next generation of rare-event search experiments in nuclear and particle physics demand structural materials combining exceptional mechanical strength with ultra-low levels of radioactive contamination. This study evaluates chemical va…
View article: Search for Dark Matter Scattering from Optically Levitated Nanoparticles
Search for Dark Matter Scattering from Optically Levitated Nanoparticles Open
The development of levitated optomechanics has enabled precise force sensors that operate in the quantum measurement regime, opening up unique opportunities to search for new physics whose weak interactions may have evaded existing sensors…
View article: Sensitivity of nEXO to $^{136}$Xe Charged-Current Interactions: Background-free Searches for Solar Neutrinos and Fermionic Dark Matter
Sensitivity of nEXO to $^{136}$Xe Charged-Current Interactions: Background-free Searches for Solar Neutrinos and Fermionic Dark Matter Open
We study the sensitivity of nEXO to solar neutrino charged-current interactions, $ν_e + ^{136}$Xe$\rightarrow ^{136}$Cs$^* + e^-$, as well as analogous interactions predicted by models of fermionic dark matter. Due to the recently observed…
View article: Optical Levitation of Arrays of Microspheres
Optical Levitation of Arrays of Microspheres Open
The videos "expand", "rearrange_1", "rearrange_2" and "Yshape" are data taken to illustrate the capabilities of the microspheres array sorting algorithm and independent control. Videos with the title "XXum_spacing-Y" are data taken for a 2…
View article: Supernova electron-neutrino interactions with xenon in the nEXO detector
Supernova electron-neutrino interactions with xenon in the nEXO detector Open
Electron-neutrino charged-current interactions with xenon nuclei were modeled in the nEXO neutrinoless double-β decay detector (∼5 metric ton, 90% Xe136, 10% Xe134) to evaluate its sensitivity to supernova neutrinos. Predictions for event …
View article: Overcoming photobleaching in imaging of single barium atoms in a solid xenon matrix
Overcoming photobleaching in imaging of single barium atoms in a solid xenon matrix Open
Neutrinoless double beta decay is one of the most sensitive probes for new physics beyond the Standard Model of particle physics. One of the isotopes under investigation is Xe136, which would double beta decay into Ba136. Detecting the sin…
View article: Mechanical Detection of Nuclear Decays
Mechanical Detection of Nuclear Decays Open
We report the detection of individual nuclear α decays through the mechanical recoil of the entire micron-sized particle in which the decaying nuclei are embedded. Momentum conservation ensures that such measurements are sensitive to any p…
View article: Imaging of single barium atoms in a second matrix site in solid xenon for barium tagging in a $^{136}$Xe double beta decay experiment
Imaging of single barium atoms in a second matrix site in solid xenon for barium tagging in a $^{136}$Xe double beta decay experiment Open
Neutrinoless double beta decay is one of the most sensitive probes for new physics beyond the Standard Model of particle physics. One of the isotopes under investigation is $^{136}$Xe, which would double beta decay into $^{136}$Ba. Detecti…
View article: Collision-resolved pressure sensing
Collision-resolved pressure sensing Open
While a continuous Brownian description of noise from heat and pressure is adequate to model measurements with relatively long integration times, these forces are ultimately generated by quantized degrees of freedom like phonons and gas pa…
View article: Quantum Sensors for High Energy Physics
Quantum Sensors for High Energy Physics Open
Strong motivation for investing in quantum sensing arises from the need to investigate phenomena that are very weakly coupled to the matter and fields well described by the Standard Model. These can be related to the problems of dark matte…
View article: Search for two-neutrino double-beta decay of <sup>136</sup>Xe to the excited state of <sup>136</sup>Ba with the complete EXO-200 dataset*
Search for two-neutrino double-beta decay of <sup>136</sup>Xe to the excited state of <sup>136</sup>Ba with the complete EXO-200 dataset* Open
A new search for two-neutrino double-beta (2 νββ ) decay of 136 Xe to the excited state of 136 Ba is performed with the full EXO-200 dataset. A deep learning-based convolutional neural network is used to discriminate signal from background…
View article: Generative adversarial networks for scintillation signal simulation in EXO-200
Generative adversarial networks for scintillation signal simulation in EXO-200 Open
Generative Adversarial Networks trained on samples of simulated or actual events have been proposed as a way of generating large simulated datasets at a reduced computational cost. In this work, a novel approach to perform the simulation o…
View article: Collision-resolved pressure sensing
Collision-resolved pressure sensing Open
Heat and pressure are ultimately transmitted via quantized degrees of freedom, like gas particles and phonons. While a continuous Brownian description of these noise sources is adequate to model measurements with relatively long integratio…
View article: Searches for Massive Neutrinos with Mechanical Quantum Sensors
Searches for Massive Neutrinos with Mechanical Quantum Sensors Open
The development of quantum optomechanics now allows mechanical sensors with femtogram masses to be controlled and measured in the quantum regime. If the mechanical element contains isotopes that undergo nuclear decay, measuring the recoil …
View article: Search for MeV electron recoils from dark matter in EXO-200
Search for MeV electron recoils from dark matter in EXO-200 Open
We present a search for electron-recoil signatures from the charged-current absorption of fermionic dark matter using the EXO-200 detector. We report an average electron-recoil background rate of 6.8 × 104 cts kg–1 yr–1 keV–1 above 4 MeV a…
View article: Research campaign: Macroscopic quantum resonators (MAQRO)
Research campaign: Macroscopic quantum resonators (MAQRO) Open
The objective of the proposed macroscopic quantum resonators (MAQRO) mission is to harness space for achieving long free-fall times, extreme vacuum, nano-gravity, and cryogenic temperatures to test the foundations of physics in macroscopic…
View article: Searches for massive neutrinos with mechanical quantum sensors
Searches for massive neutrinos with mechanical quantum sensors Open
The development of quantum optomechanics now allows mechanical sensors with femtogram masses to be controlled and measured in the quantum regime. If the mechanical element contains isotopes that undergo nuclear decay, measuring the recoil …
View article: Development of a <sup>127</sup>Xe calibration source for nEXO
Development of a <sup>127</sup>Xe calibration source for nEXO Open
We study a possible calibration technique for the nEXO experiment using a 127 Xe electron capture source. nEXO is a next-generation search for neutrinoless double beta decay (0 νββ ) that will use a 5-tonne, monolithic liquid xenon time pr…
View article: MAQRO -- BPS 2023 Research Campaign Whitepaper
MAQRO -- BPS 2023 Research Campaign Whitepaper Open
The objective of the proposed MAQRO mission is to harness space for achieving long free-fall times, extreme vacuum, nano-gravity, and cryogenic temperatures to test the foundations of physics in macroscopic quantum experiments. This will r…
View article: Kiloton-scale xenon detectors for neutrinoless double beta decay and other new physics searches
Kiloton-scale xenon detectors for neutrinoless double beta decay and other new physics searches Open
We report that large detectors employing xenon are a leading technology in existing and planned searches for new physics, including searches for neutrinoless double beta decay (0νββ) and dark matter. While upcoming detectors will employ ta…
View article: nEXO: neutrinoless double beta decay search beyond 10<sup>28</sup> year half-life sensitivity
nEXO: neutrinoless double beta decay search beyond 10<sup>28</sup> year half-life sensitivity Open
The nEXO neutrinoless double beta (0 νββ ) decay experiment is designed to use a time projection chamber and 5000 kg of isotopically enriched liquid xenon to search for the decay in 136 Xe. Progress in the detector design, paired with high…
View article: Control and measurement of electric dipole moments in levitated optomechanics
Control and measurement of electric dipole moments in levitated optomechanics Open
Levitated optomechanical systems are rapidly becoming leading tools for precision sensing, enabling a high level of control over the sensor's center of mass motion, rotation and electric charge state. Higher-order multipole moments in the …
View article: Control and measurement of electric dipole moments in levitated\n optomechanics
Control and measurement of electric dipole moments in levitated\n optomechanics Open
Levitated optomechanical systems are rapidly becoming leading tools for\nprecision sensing, enabling a high level of control over the sensor's center of\nmass motion, rotation and electric charge state. Higher-order multipole moments\nin t…
View article: Trapped Electrons and Ions as Particle Detectors
Trapped Electrons and Ions as Particle Detectors Open
Electrons and ions trapped with electromagnetic fields have long served as important high-precision metrological instruments, and more recently have also been proposed as a platform for quantum information processing. Here we point out tha…
View article: Reflectivity of VUV-sensitive silicon photomultipliers in liquid Xenon
Reflectivity of VUV-sensitive silicon photomultipliers in liquid Xenon Open
Silicon photomultipliers are regarded as a very promising technology for next-generation, cutting-edge detectors for low-background experiments in particle physics. This work presents systematic reflectivity studies of Silicon Photomultipl…
View article: Limits on the abundance of millicharged particles bound to matter
Limits on the abundance of millicharged particles bound to matter Open
Millicharged particles (mCPs) are hypothesized particles possessing an\nelectric charge that is a fraction of the charge of the electron. We report a\nsearch for mCPs with charges $\\gtrsim 10^{-4}~e$ that improves sensitivity to\ntheir ab…