A5087525597- Cold Atom Physics and Bose-Einstein Condensates
- Advanced Frequency and Time Standards
- Atomic and Subatomic Physics Research
- Quantum Information and Cryptography
- Quantum Mechanics and Applications
- Scientific Measurement and Uncertainty Evaluation
- Geophysics and Sensor Technology
- Quantum optics and atomic interactions
- Radioactive Decay and Measurement Techniques
- Dark Matter and Cosmic Phenomena
- Advanced Materials Characterization Techniques
- Advanced Measurement and Metrology Techniques
- Advanced MEMS and NEMS Technologies
- Mechanical and Optical Resonators
- Pulsars and Gravitational Waves Research
- Atomic and Molecular Physics
- Gamma-ray bursts and supernovae
- Solid State Laser Technologies
- Particle physics theoretical and experimental studies
- CCD and CMOS Imaging Sensors
- Particle Detector Development and Performance
- Functional Brain Connectivity Studies
- Laser-induced spectroscopy and plasma
- Force Microscopy Techniques and Applications
- Advanced Optical Sensing Technologies
Northwestern University
2018-2024
Stanford University
2010-2022
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 demonstrate atom interferometers utilizing a novel beam splitter based on sequential multiphoton Bragg diffractions. With this large momentum transfer (SB-LMT) splitter, we achieve high contrast with splittings of up to 102 photon recoil momenta ($102\ensuremath{\hbar}k$). To our knowledge, is the highest splitting achieved in any interferometer, advancing state-of-the-art by an order magnitude. also strong noise correlation between two simultaneous SB-LMT interferometers, which...
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...
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...
The Coriolis force is a significant source of systematic phase errors and dephasing in atom interferometry often compensated by counter-rotating the laser beam against Earth's rotation. We present novel method for performing compensation long-baseline interferometry, which mitigates atom-beam misalignment due to rotation, an effect magnified long lever arm baseline length. involves adjustment angle interferometer prior magnifying telescope, enabling pivot around tunable position along...
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...
The combination of adiabatic rapid passage and multiphoton Bragg diffraction (ARPMB pulses) to efficiently transfer many photon recoils momentum ($\ensuremath{\hbar}k$) cold-atom clouds is theoretically experimentally investigated. This method insensitive perturbations the pulse intensity or detuning. In particular, calculated velocity acceptance can be up $80%$ one recoil ${v}_{r}$, theoretical maximum in diffraction. We demonstrate ARPMB pulses with efficiency 99.7$%$ per...
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) using sequences of many laser pulses necessary, thus high fidelity each pulse important since small infidelities become magnified. Quantum Optimal Control (QOC) framework developing control waveforms that achieve are robust against experimental imperfections....
We have demonstrated a 100-fold improvement in the magnetic field uniformity on axis of large aspect ratio, cylindrical, mumetal shield by reducing discontinuities material through welding and re-annealing segmented shield. The three-layer reduces Earth's along an 8 m region to 420 μG (rms) axial direction, 460 730 two transverse directions. Each cylindrical is continuous welded tube which has been annealed after manufacture degaussed apparatus. present both experiments finite element...
We provide an analytical description of the dynamics atom in optical lattice using method perturbative adiabatic expansion. A precise understanding lattice-atom interaction is essential to taking full advantage promising applications that lattices offer field interferometry. One such application implementation Large Momentum Transfer (LMT) beam splitters can potentially multiple order magnitude increases momentum space separations over current technology. also propose interferometer...
Abstract 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 laboratory environment passive active mitigation noise sources must be implemented. To inform research development design, we measure ambient temperature, humidity, vibrations installation site. find that temperature fluctuations will necessitate enclosures critical subsystems a controlled laser room...
We present a laser system for performing single-photon atom interferometry on the 698 nm clock transition in ultracold strontium. coherently combine power of two titanium:sapphire lasers and demonstrate chirps 200 MHz 2.5 ms while phase-locked to an optical reference. Moreover, we novel, best our knowledge, scheme deliver 4 W pulsed beams atoms via mode-cleaning fiber using active noise cancellation.
We introduce a novel technique for enhancing the robustness of light-pulse atom interferometers against pulse infidelities that typically limit their sensitivities. The uses quantum optimal control to favorably harness multipath interference stray trajectories produced by imperfect atom-optics operations. apply this method resonant interferometer and achieve thousandfold phase amplification, representing 50-fold improvement over performance observed without optimized control. Moreover, we...
The next generation of gravitational-wave observatories can explore a wide range fundamental physics phenomena throughout the history universe. These include access to universe's binary black hole population cosmic time, expansion independent distance ladders, stochastic gravitational-waves from early-universe phase transitions, warped space-time in strong-field and high-velocity limit, equation state nuclear matter at neutron star post-merger densities, dark candidates through their...
We present the development of a laser system for performing single-photon atom interferometry on 698 nm clock transition in ultracold Strontium. coherently combine power two Titanium:Sapphire lasers and demonstrate chirps 200 MHz 2.5 ms while phase-locked to an optical reference. Moreover, we novel scheme deliver 4 W pulsed beams atoms via mode-cleaning fiber using active noise cancellation.