Tim Kovachy
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View article: Characterizing atmospheric gravity gradient noise for vertical atom interferometers
Characterizing atmospheric gravity gradient noise for vertical atom interferometers Open
Terrestrial long-baseline atom interferometer experiments are emerging as powerful tools for probing new fundamental physics, including searches for dark matter and gravitational waves. In the frequency range relevant to these signals, gra…
View article: Long-Baseline Atom Interferometry
Long-Baseline Atom Interferometry Open
Long-baseline atom interferometry is a promising technique for probing various aspects of fundamental physics, astrophysics and cosmology, including searches for ultralight dark matter (ULDM) and for gravitational waves (GWs) in the freque…
View article: Demonstration that Differential Length Changes of Optical Cavities are a Sensitive Probe for Ultralight Dark Matter
Demonstration that Differential Length Changes of Optical Cavities are a Sensitive Probe for Ultralight Dark Matter Open
Measurements of differential length oscillations of Fabry-Perot cavities provide a sensitive and promising approach to searching for scalar ultralight dark matter (ULDM). The initial demonstration sets direct lower bounds that are one to t…
View article: Robust Quantum Control via Multipath Interference for Thousandfold Phase Amplification in a Resonant Atom Interferometer
Robust Quantum Control via Multipath Interference for Thousandfold Phase Amplification in a Resonant Atom Interferometer Open
We introduce a novel technique for enhancing the robustness of light-pulse atom interferometers against the pulse infidelities that typically limit their sensitivities. The technique uses quantum optimal control to favorably harness the mu…
View article: Clear skies ahead: characterizing atmospheric gravity gradient noise for vertical atom interferometers
Clear skies ahead: characterizing atmospheric gravity gradient noise for vertical atom interferometers Open
Terrestrial long-baseline atom interferometer experiments are emerging as powerful tools for probing new fundamental physics, including searches for dark matter and gravitational waves. In the frequency range relevant to these signals, gra…
View article: Feynman Diagrams for Matter Wave Interferometry
Feynman Diagrams for Matter Wave Interferometry Open
We introduce a new theoretical framework based on Feynman diagrams to compute phase shifts in matter wave interferometry. The method allows for analytic computation of higher order quantum corrections, beyond the traditional semi-classical…
View article: Coriolis Force Compensation and Laser Beam Delivery for 100-Meter Baseline Atom Interferometry
Coriolis Force Compensation and Laser Beam Delivery for 100-Meter Baseline Atom Interferometry Open
The Coriolis force is a significant source of systematic phase errors and dephasing in atom interferometry and is often compensated by counter-rotating the interferometry laser beam against Earth's rotation. We present a novel method for p…
View article: Enhancing strontium clock atom interferometry using quantum optimal control
Enhancing strontium clock atom interferometry using quantum optimal control Open
Strontium clock atom interferometry is a promising new technique, with multiple experiments under development to explore its potential for dark matter and gravitational wave detection. In these detectors, large momentum transfer (LMT) usin…
View article: High-power, low-phase-noise, frequency-agile laser system for delivering fiber-noise-cancelled pulses for Strontium clock atom interferometry
High-power, low-phase-noise, frequency-agile laser system for delivering fiber-noise-cancelled pulses for Strontium clock atom interferometry Open
We present the development of a laser system for performing single-photon atom interferometry on the 698 nm clock transition in ultracold Strontium. We coherently combine the power of two Titanium:Sapphire lasers and demonstrate chirps of …
View article: Snowmass2021 Cosmic Frontier White Paper: Future Gravitational-Wave Detector Facilities
Snowmass2021 Cosmic Frontier White Paper: Future Gravitational-Wave Detector Facilities Open
The next generation of gravitational-wave observatories can explore a wide range of fundamental physics phenomena throughout the history of the universe. These phenomena include access to the universe's binary black hole population through…
View article: Erratum: MAGIS-100 environmental characterization and noise analysis
Erratum: MAGIS-100 environmental characterization and noise analysis Open
We investigate and analyze site specific systematics for the MAGIS-100 atomic interferometry experiment at Fermi National Accelerator Laboratory. As atom interferometers move out of the laboratory environment passive and active mitigation …
View article: MAGIS-100 environmental characterization and noise analysis
MAGIS-100 environmental characterization and noise analysis Open
We investigate and analyze site specific systematics for the MAGIS-100 atomic interferometry experiment at Fermi National Accelerator Laboratory. As atom interferometers move out of the laboratory environment passive and active mitigation …
View article: Beam Profiling With Noise Reduction From Computer Vision and Principal Component Analysis for the MAGIS-100 Experiment
Beam Profiling With Noise Reduction From Computer Vision and Principal Component Analysis for the MAGIS-100 Experiment Open
MAGIS-100 is a long-baseline atom interferometer that operates as a quantum\nsensor. It will search for dark matter, probe fundamental quantum science, and\nserve as a prototype gravitational wave detector in the 0.3 to 3~Hz frequency\nran…
View article: New Technologies for Discovery
New Technologies for Discovery Open
For the field of high energy physics to continue to have a bright future, priority within the field must be given to investments in the development of both evolutionary and transformational detector development that is coordinated across t…
View article: PROPOSAL: P-1101 Matter-wave Atomic Gradiometer Interferometric Sensor (MAGIS-100)
PROPOSAL: P-1101 Matter-wave Atomic Gradiometer Interferometric Sensor (MAGIS-100) Open
We propose to build and install at Fermilab a next generation instrument that uses light pulse atom interferometry to search for physics beyond the Standard Model. In particular, we propose to search for dark matter and new forces, and to …
View article: Effective Inertial Frame in an Atom Interferometric Test of the Equivalence Principle
Effective Inertial Frame in an Atom Interferometric Test of the Equivalence Principle Open
In an ideal test of the equivalence principle, the test masses fall in a common inertial frame. A real experiment is affected by gravity gradients, which introduce systematic errors by coupling to initial kinematic differences between the …
View article: Effective inertial frame in an atom interferometric test of the equivalence principle
Effective inertial frame in an atom interferometric test of the equivalence principle Open
In an ideal test of the equivalence principle, the test masses fall in a common inertial frame. A real experiment is affected by gravity gradients, which introduce systematic errors by coupling to initial kinematic differences between the …
View article: Phase Shift in an Atom Interferometer due to Spacetime Curvature across its Wave Function
Phase Shift in an Atom Interferometer due to Spacetime Curvature across its Wave Function Open
Spacetime curvature induces tidal forces on the wave function of a single quantum system. Using a dual light-pulse atom interferometer, we measure a phase shift associated with such tidal forces. The macroscopic spatial superposition state…
View article: Response to "Verifying quantum superpositions at metre scales"
Response to "Verifying quantum superpositions at metre scales" Open
The preceding BCA (Stamper-Kurn et. al., arXiv:1607.01454) asserts that our observation of interference contrast in a half-metre-scale atom interferometer (Kovachy et. al., Nature 528, 530-3 (2015)) does not prove the existence of macrosco…