A5058755827- Cold Atom Physics and Bose-Einstein Condensates
- Advanced Frequency and Time Standards
- Atomic and Subatomic Physics Research
- Quantum Mechanics and Applications
- Pulsars and Gravitational Waves Research
- Quantum Information and Cryptography
- Scientific Measurement and Uncertainty Evaluation
- Quantum optics and atomic interactions
- Advanced Materials Characterization Techniques
- Radioactive Decay and Measurement Techniques
- Advanced Fiber Laser Technologies
- Dark Matter and Cosmic Phenomena
- Gamma-ray bursts and supernovae
- Geophysics and Sensor Technology
- Mechanical and Optical Resonators
- Atmospheric Ozone and Climate
- Advanced MEMS and NEMS Technologies
- Cold Fusion and Nuclear Reactions
- Spectroscopy and Laser Applications
- Advanced Measurement and Metrology Techniques
- Atomic and Molecular Physics
- Cosmology and Gravitation Theories
- Magnetic Bearings and Levitation Dynamics
- Electric Motor Design and Analysis
- Photorefractive and Nonlinear Optics
Stanford University
2015-2024
Science Applications International Corporation (United States)
2013
General Electric (United States)
1985-1993
Sandia National Laboratories California
1979
University of California, Davis
1979
We show that light-pulse atom interferometry with atomic point sources and spatially resolved detection enables multi-axis (two rotation, one acceleration) precision inertial sensing at long interrogation times. Using this method, we demonstrate a interferometer for Rb-87 1.4 cm peak wavepacket separation duration of 2T = 2.3 seconds. The inferred acceleration sensitivity each shot is 6.7 * 10^(-12) g, which improves on previous limits by more than two orders magnitude. also measure the...
The unprecedented precision of atom interferometry will soon lead to laboratory tests general relativity levels that rival or exceed those reached by astrophysical observations. We propose such an experiment initially test the equivalence principle 1 part in 10(15) (300 times better than current limit), and 10(17) future. It also probe relativistic effects - as nonlinear three-graviton coupling, gravity atom's kinetic energy, falling light several decimals. In contrast with observations, can...
Laser frequency noise is a dominant background for the detection of gravitational waves using long-baseline optical interferometry. Amelioration this requires near simultaneous strain measurements on more than one interferometer baseline, necessitating, example, two satellites space-based detector or arms ground-based detector. We describe new strategy based recent advances in atomic clocks and atom interferometry which can operate at long baselines immune to laser noise. suppressed because...
We propose two distinct atom interferometer gravitational wave detectors, one terrestrial and another satellite based, utilizing the core technology of Stanford 10 m presently under construction. Each configuration compares widely separated interferometers run using common lasers. The signal scales with distance between interferometers, which can be large since only light travels over this distance, not atoms. experiment $\ensuremath{\sim}10\text{ }\text{ }\mathrm{m}$ by a...
Abstract We propose in this White Paper a concept for space experiment using cold atoms to search ultra-light dark matter, and detect gravitational waves the frequency range between most sensitive ranges of LISA terrestrial LIGO/Virgo/KAGRA/INDIGO experiments. This interdisciplinary experiment, called Atomic Experiment Dark Matter Gravity Exploration (AEDGE), will also complement other planned searches exploit synergies with wave detectors. give examples extended sensitivity matter offered...
We present a single-source dual atom interferometer and utilize it as gradiometer for precise gravitational measurements. The macroscopic separation between interfering atomic wave packets (as large 16 cm) reveals the interplay of recoil effects curvature from nearby Pb source mass. baseline is set by laser wavelength pulse timings, which can be measured to high precision. Using long drift time momentum transfer optics, reaches resolution $3 \times 10^{-9}$ s$^{-2}$ per shot measures 1 rad...
Using a matter wave lens and long time of flight, we cool an ensemble Rb87 atoms in two dimensions to effective temperature less than 50−30+50 pK. A short pulse red-detuned light generates optical dipole force that collimates the ensemble. We also report three-dimensional magnetic substantially reduces chemical potential evaporatively cooled ensembles with high atom number. By observing such low temperatures, set limits on proposed modifications quantum mechanics macroscopic regime. These...
MAGIS-100 is a next-generation quantum sensor under construction at Fermilab that aims to explore fundamental physics with atom interferometry over 100-meter baseline. This novel detector will search for ultralight dark matter, test mechanics in new regimes, and serve as technology pathfinder future gravitational wave detectors previously unexplored frequency band. It combines techniques demonstrated state-of-the-art 10-meter-scale interferometers the latest technological advances of world's...
Atom interferometry is now reaching sufficient precision to motivate laboratory tests of general relativity. We begin by explaining the nonrelativistic calculation phase shift in an atom interferometer and deriving its range validity. From this, we develop a method for calculating Both atoms light are treated relativistically all coordinate dependencies removed, thus revealing novel terms, cancellations, new origins previously calculated terms. This formalism then used find relativistic...
We propose two distinct atom interferometer gravitational wave detectors, one terrestrial and another satellite-based, utilizing the core technology of Stanford 10 m presently under construction. The experiment can operate with strain sensitivity ∼10−19Hz in 1–10 Hz band, inaccessible to LIGO, detect waves from solar mass binaries out megaparsec distances. satellite probes same frequency spectrum as LISA comparable ∼10−20Hz. Each configuration compares widely separated interferometers run...
We show that gravitational wave detectors based on a type of atom interferometry are sensitive to ultralight scalar dark matter. Such matter can cause temporal oscillations in fundamental constants with frequency set by the mass and amplitude determined local density. The result is modulation atomic transition energies. point out new time-domain signature this effect detector compares two spatially separated interferometers referenced common laser. improve current searches for electron-mass...
In an ideal test of the equivalence principle, masses fall in a common inertial frame. A real experiment is affected by gravity gradients, which introduce systematic errors coupling to initial kinematic differences between masses. Here we demonstrate method that reduces sensitivity dual-species atom interferometer kinematics using frequency shift mirror pulse create effective frame for both atomic species. Using this method, suppress gravity-gradient-induced dependence differential phase on...
We present a method for determining the phase and contrast of single shot an atom interferometer. The application shear across ensemble yields spatially varying fringe pattern at each output port, which can be imaged directly. This is broadly relevant to atom-interferometric precision measurement, as we demonstrate in 10 m 87Rb atomic fountain by implementing gyrocompass with mdeg precision.
We describe an atom interferometric gravitational wave detector design that can operate in a resonant mode for increased sensitivity. By oscillating the positions of atomic packets, this detection allows coherently enhanced, narrow-band sensitivity at target frequencies. The proposed is flexible and be rapidly switched between broadband modes. For instance, binary discovered subsequently studied further as inspiral evolves by using tailored response. In addition to functioning like lock-in...
We report the first realization of large momentum transfer (LMT) clock atom interferometry. Using single-photon interactions on strontium ^{1}S_{0}-^{3}P_{1} transition, we demonstrate Mach-Zehnder interferometers with state-of-the-art separation up to 141 ℏk and gradiometers 81 ℏk. Moreover, circumvent excited state decay limitations extend gradiometer duration 50 times lifetime. Because broad velocity acceptance interferometry pulses, all experiments are performed laser-cooled atoms at a...
We propose a scheme based on heterodyne laser link that allows for long baseline gravitational wave detection using atom interferometry. While the length in previous atom-based proposals is constrained by need reference to remain collimated as it propagates between two satellites, here we circumvent this requirement employing strong local oscillator near each ensemble phase locked beam. Longer baselines offer number of potential advantages, including enhanced sensitivity, simplified optics,...
We assess the science reach and technical feasibility of a satellite mission based on precision atomic sensors configured to detect gravitational radiation. Conceptual advances in past three years indicate that two-satellite constellation with payloads consisting laser cooled Sr can achieve scientifically interesting wave strain sensitivities frequency band between LISA LIGO detectors, roughly 30 mHz 10 Hz. The discovery potential proposed instrument ranges from observation new astrophysical...
Floquet engineering offers a compelling approach for designing the time evolution of periodically driven systems. We implement periodic atom-light coupling to realize atom optics on strontium ^{1}S_{0}-^{3}P_{1} transition. These reach pulse efficiencies above 99.4% over wide range frequency offsets between light and atomic resonance, even under strong driving where this detuning is order Rabi frequency. Moreover, we use compensate differential Doppler shifts in large momentum transfer...
We built an ultra-low-noise angle sensor by combining a folded optical lever and Sagnac interferometer. The instrument has measured noise floor of 1.3 prad/√Hz at 2.4 kHz. achieve this record sensitivity using proof-of-concept apparatus with conservative N=11 bounces in the lever. This technique could be extended to reach subpicoradian/√Hz sensitivities optimized design.
We demonstrate high-efficiency frequency doubling of the combined output two 1560 nm 30 W fiber amplifiers via single pass through periodically poled lithium niobate (PPLN) crystals. The temporal profile 780 is controlled by adjusting relative phase between seeds amplifiers. obtain a peak power 34 light passing one PPLN crystal, and 43 cascading This source provides high optical power, excellent beam quality spectral purity, agile amplitude control in simple compact setup, which ideal for...
Abstract This article contains a summary of the White Paper submitted in 2019 to ESA Voyage 2050 process, which was subsequently published EPJ Quantum Technology (AEDGE Collaboration et al. Quant. Technol. 7 ,6 2020). We propose this concept for space experiment using cold atoms search ultra-light dark matter, and detect gravitational waves frequency range between most sensitive ranges LISA terrestrial LIGO/Virgo/KAGRA/INDIGO experiments. interdisciplinary experiment, called Atomic...