Erik W. Lentz
A5081880422- Dark Matter and Cosmic Phenomena
- Atomic and Subatomic Physics Research
- Cosmology and Gravitation Theories
- Particle physics theoretical and experimental studies
- Cold Atom Physics and Bose-Einstein Condensates
- Quantum Information and Cryptography
- Advanced Thermodynamics and Statistical Mechanics
- Galaxies: Formation, Evolution, Phenomena
- Quantum Electrodynamics and Casimir Effect
- Solar and Space Plasma Dynamics
- Quantum, superfluid, helium dynamics
- Scientific Research and Discoveries
- Noncommutative and Quantum Gravity Theories
- Particle Detector Development and Performance
- Advanced Frequency and Time Standards
- Astrophysics and Cosmic Phenomena
- Statistical Mechanics and Entropy
- Enzyme function and inhibition
- Algebraic and Geometric Analysis
- Pulsars and Gravitational Waves Research
- Chemical Reaction Mechanisms
- Microwave and Dielectric Measurement Techniques
- Mechanical and Optical Resonators
- Climate Change Policy and Economics
- Synthesis and Catalytic Reactions
Pacific Northwest National Laboratory
2021-2025
University of Göttingen
2018-2023
University of Washington
2016-2020
Yale University
1977
This Letter reports the results from a haloscope search for dark matter axions with masses between 2.66 and 2.81 μeV. The excludes range of axion-photon couplings predicted by plausible models invisible axion. unprecedented sensitivity is achieved operating large-volume at subkelvin temperatures, thereby reducing thermal noise as well excess ultralow-noise superconducting quantum interference device amplifier used signal power readout. Ongoing searches will provide nearly definitive tests...
This Letter reports on a cavity haloscope search for dark matter axions in the Galactic halo mass range 2.81-3.31 μeV. utilizes combination of low-noise Josephson parametric amplifier and large-cavity to achieve unprecedented sensitivity across this range. excludes full axion-photon coupling values predicted benchmark models invisible axion that solve strong CP problem quantum chromodynamics.
Antiferromagnetically doped topological insulators (ATI) are among the candidates to host dynamical axion fields and polaritons, weakly interacting quasiparticles that analogous dark axion, a long sought after candidate matter particle. Here we demonstrate using quasiparticle antiferromagnetic resonance in ATIs conjunction with low-noise methods of detecting THz photons presents viable route detect mass 0.7 3.5 meV, range currently inaccessible other detection experiments proposals. The...
The μeV axion is a well-motivated extension to the standard model. Axion Dark Matter eXperiment (ADMX) collaboration seeks discover this particle by looking for resonant conversion of dark-matter axions microwave photons in strong magnetic field. In Letter, we report results from pathfinder experiment, ADMX "Sidecar," which designed pave way future, higher mass, searches. This testbed experiment lives inside and operates tandem with main experiment. Sidecar excludes masses three widely...
This work studies the formation and growth of boson stars their surrounding miniclusters by gravitational condensation using non-linear dynamical numerical methods. Fully attractive repulsive self-interactions are also considered for first time. In case pure gravity, we numerically prove that inside halos slows down saturates as has been previously conjectured, detail its conditions. Self-interactions included Gross-Pitaevskii-Poisson equations. We find in strong can become unstable...
Searching for axion dark matter, the ADMX Collaboration acquired data from January to October 2018, over mass range 2.81–3.31 μeV, corresponding frequency 680–790 MHz. Using an haloscope consisting of a microwave cavity in strong magnetic field, experiment excluded Dine-Fischler-Srednicki-Zhitnisky (DFSZ) axions at 90% confidence level and 100% matter density this entire range, except few gaps due mode crossings. This paper explains full analysis run 1B, motivating choices informed by...
We describe the first implementation of a Josephson Traveling Wave Parametric Amplifier (JTWPA) in an axion dark matter search. The operation JTWPA for period about two weeks achieved sensitivity to axion-like particle with axion-photon couplings above 10-13 Ge V-1 over narrow range masses centered around 19.84 µeV by tuning resonant frequency cavity 4796.7-4799.5 MHz. was operated insert experiment as part independent receiver chain that attached 0.56-l cavity. ability deliver high gain...
Axion dark matter experiment ultra-low noise haloscope technology has enabled the successful completion of two science runs (1A and 1B) that looked for axions in 2.66-3.1 μeV mass range with Dine-Fischler-Srednicki-Zhitnisky sensitivity [Du et al., Phys. Rev. Lett. 120, 151301 (2018) Braine 124, 101303 (2020)]. Therefore, it is most sensitive axion search to date this range. We discuss technological advances made last several years achieve sensitivity, which includes implementation...
Abstract Solitons in space-time capable of transporting time-like observers at superluminal speeds have long been tied to violations the weak, strong, and dominant energy conditions general relativity. The negative-energy sources required for these solitons must be created through energy-intensive uncertainty principle processes as no such classical source is known particle physics. This paper overcomes this barrier by constructing a class soliton solutions that are motion sourced purely...
In this paper, we study the Bose-Einstein condensation of a scalar field with an attractive self-interaction, or without gravitational interactions. We confirm through full dynamical simulation that timescale due to self-interaction is inversely proportional square number density $n$ and self-coupling constant $g$ : $\tau \propto n^{-2} g^{-2}$. also investigate when gravity are both important by solving Gross-Pitaevskii-Poisson equations, find time scales according additive model for cross...
We report the results of a QCD axion dark matter search with discovery ability for Dine-Fischler-Srednicki-Zhitnitsky (DFSZ) axions using an haloscope. Sub-Kelvin noise temperatures are reached ultralow Josephson parametric amplifier cooled by dilution refrigerator. This work excludes (with 90% confidence level) DFSZ masses between 3.27 to <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mn>3.34</a:mn><a:mtext> </a:mtext><a:mtext> </a:mtext><a:mi...
We investigate reentrant and dielectric loaded cavities for the purpose of extending range axion cavity haloscopes to lower masses, below where Axion Dark Matter eXperiment (ADMX) has already searched. Reentrant were simulated numerically calculate optimize their form factors quality factors. A prototype was built its measured properties compared with simulations. estimate sensitivity dark matter searches using inserted in existing ADMX magnet at University Washington a large being installed...
The ADMX Collaboration gathered data for its Run 1A axion dark matter search from January 2017 to June 2017, scanning with an haloscope over the frequency range 645–680 MHz (<a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mn>2.66</a:mn><a:mi>–</a:mi><a:mn>2.81</a:mn><a:mtext> </a:mtext><a:mtext> </a:mtext><a:mi mathvariant="normal">μ</a:mi><a:mi>eV</a:mi></a:mrow></a:math> in mass) at Dine-Fischler-Srednicki-Zhitnitskii (DFSZ) sensitivity. resulting found no...
The Axion Dark Matter eXperiment (ADMX) has previously excluded Dine-Fischler-Srednicki-Zhitnisky (DFSZ) axions between 680–790 MHz under the assumption that dark matter is described by isothermal halo model. However, precise nature of velocity distribution still unknown, and alternative models have been proposed. We report results a nonvirialized axion search over mass range 2.81–3.31 μeV, corresponding to frequency 680–800 MHz. This analysis marks most sensitive for Doppler effects in...
Abstract Signal estimates for direct axion dark matter (DM) searches have used the isothermal sphere halo model last several decades. While insightful, does not capture effects from a halo’s infall history nor influence of baryonic matter, which has been shown to significantly inner structure. The high resolution cavity detectors can make use modern cosmological structure-formation simulations, begin realistic initial conditions, incorporate wide range physics, and are capable resolving...
We summarize progress made in theoretical astrophysics and cosmology over the past decade areas of interest for coming decade. This Report is prepared as TF09 "Astrophysics Cosmology" topical group summary Theory Frontier part Snowmass 2021 process.
Axions as dark matter is an increasingly important subject in astrophysics and cosmology. Experimental observational searches are mounting across the mass spectrum of axion-like particles, many which require detailed knowledge axion structure over a wide range scales. Current understanding structures far from complete, however, due largely to controversy modeling candidate's highly-degenerate state. The series Axion Structure Formation seeks develop consistent model QCD dynamics that follows...
Systems of identical particles possessing non-local interactions are capable exhibiting extra-classical properties beyond the characteristic quantum length scales. This letter derives dynamics such systems in non-relativistic and degenerate limit, showing effect exchange symmetry correlations on structure both out equilibrium. Such descriptions may be crucial to understanding ranging from nuclei dark matter. Correlated condensed solutions also compared contrasted more established approaches...
We present a new exclusion bound of axion-like particle dark matter with axion-photon couplings above $\mathrm{10^{-13}}$ $\mathrm{GeV^{-1}}$ over the frequency range 4796.7--4799.5 MHz, corresponding to narrow axion masses centered around 19.84 $μ$eV. This measurement represents first implementation Josephson Traveling Wave Parametric Amplifier (JTWPA) in search. The JTWPA was operated insert Axion Dark Matter eXperiment (ADMX) as part an independent receiver chain that attached 0.588-liter...
The near universality of DM halo density profiles provided by N-body simulations has proven to be robust against changes in total mass density, power spectrum, and some forms initial velocity dispersion. In this letter we study the effects coherently spinning up an isolated DM-only progenitor on structure. Halos with spins within several standard deviations simulated mean ($\lambda \lesssim 0.20$) produce negligible from universal form. Only when spin becomes quite large \gtrsim do...
Solitons in space-time capable of transporting time-like observers at superluminal speeds have long been tied to violations the weak, strong, and dominant energy conditions general relativity. This trend was recently broken by a new approach that identified soliton solutions travel while being sourced purely positive densities. is first example hyper-fast solitons satisfying weak condition, reopening discussion mechanisms rooted conventional physics. article summarizes recent finding its...