Anderson localization (AL) is a ubiquitous interference phenomenon in which waves fail to propagate disordered medium. We observe three-dimensional AL of noninteracting ultracold matter by allowing spin-polarized atomic Fermi gas expand into potential. A two-component density distribution emerges consisting an expanding mobile component and nondiffusing localized component. extract mobility edge that increases with the disorder strength, whereas thermally averaged length shown decrease...

We observe the emergence of a disorder-induced insulating state in strongly interacting atomic Fermi gas trapped an optical lattice. This closed quantum system free thermal reservoir realizes disordered Fermi-Hubbard model, which is minimal model for correlated electronic solids. In measurements localization obtained via mass transport, we detect interaction-driven delocalization and that persists as temperature raised. These behaviors are consistent with many-body localization, novel...

Abstract Laser-cooled atoms are a key technology for many calibration-free measurement platforms—including clocks, gyroscopes, and gravimeters—and promising system quantum networking computing. The optics vacuum hardware required to prepare these gases often bulky not amenable large-volume manufacturing, limiting the practical realization of devices benefiting from properties cold atoms. Planar, lithographically produced including photonic integrated circuits, optical metasurfaces (MSs),...

Atomic beams are a longstanding technology for atom-based sensors and clocks with widespread use in commercial frequency standards. Here, we report the demonstration of chip-scale microwave atomic beam clock using coherent population trapping (CPT) interrogation passively pumped device. The device consists hermetically sealed vacuum cell fabricated from an anodically bonded stack glass Si wafers which lithographically defined capillaries produce Rb passive pumps maintain environment. A...

We report on the impact of variable-scale disorder 3D Anderson localization a noninteracting ultracold atomic gas. A spin-polarized gas fermionic atoms is localized by allowing it to expand in an optical speckle potential. Using sudden quench density distribution, we verify that profile representative underlying single-particle states. The geometric mean disordering potential correlation lengths varied factor 4 via adjusting aperture focusing lens. observe root-mean-square size increases...

Electrical current in conventional metals is carried by electrons that retain their individual character. Bad metals, such as the normal state of some high-temperature superconductors, violate this scenario, and complete picture for behavior remains unresolved. Here, we report phenomena consistent with bad-metal behaviour an optical-lattice Hubbard model measuring transport lifetime a mass excited stimulated Raman transitions. We demonstrate incompatibility weak-scattering theory key...

The interaction of crystallographic twin boundaries with an external magnetic field as a mechanism for shape deformation is analyzed theoretically and applied to the alloy Ni2MnGa. A defect, modeled Gaussian strain distribution interacting elastically boundary, localized in one two variants bordering boundary. Micromagnetic equations are used determine magnetization angles throughout well equilibrium positions These values angle now incorporated into governing time dependence boundary...

Abstract We describe three independent research directions focussed on the development of next-generation chip-scale atomic clocks, which combine small size, low power consumption and manufacturability with high frequency stability. The use optical transitions in microfabricated vapor cells improves both short- long-term stability to near 10 −13 at cost added complexity a comb. Chip-scale beam microwave clocks have been successfully demonstrated offer potential for microsecond-level timing...

High-resolution imaging of optical resonator modes is a key step in the development and characterization nanophotonic devices. Many sub-wavelength mode-imaging techniques have been developed using electron beam excitation-each with its own limitations spectral spatial resolution. Here, we report 2D technique pulsed, low-energy focused ion Li

Ion sources based on laser cooling have recently provided new pathways to high-resolution microscopy, ion milling, and implantation. Here, we present the design detailed characterization of a 7Li magneto-optical trap source (MOTIS) with peak brightness (1.2 ± 0.2) × 105 A m-2 sr-1 eV-1 maximum continuous current over 1 nA. These values significantly surpass previous Li MOTIS performance benchmarks. Using simple models, discuss how this system relates fundamental operating limits. This will...

The development of Li focused ion beams (Li-FIB) enables controlled insertion into materials with nanoscale resolution. We take the first step toward establishing relevance Li-FIB for studies dynamics in electrochemically active by comparing FIB lithiation conventional electrochemical isolated β-Sn microspheres. Samples are characterized cross-sectioning Ga and imaging via electron microscopy. lithiated Sn exhibit similarities that suggest can be a powerful tool exploring dynamical...

Coherent population trapping (CPT) in atomic vapors using all-optical interrogation has enabled the miniaturization of microwave clocks. Light shifts induced by CPT driving fields can impact spectral profile resonances and are a common limit to long-term stability Nonlinear light have been observed several systems not explored detail. In this Letter, we demonstrate that nonlinear clocks arise from spatially inhomogeneous fields. We measure effect Gaussian laser beams buffer gas cell show...

Electrochemical processes that govern the performance of lithium ion batteries involve numerous parallel reactions and interfacial phenomena complicate microscopic understanding these systems. To study behavior transport reaction in applications, we report use a focused beam Li+ to locally insert controlled quantities with high spatial resolution into electrochemically relevant materials vacuo. benchmark technique, present results on direct-write lithiation 35 nm thick crystalline silicon...

We report the discovery of phenomena consistent with bad-metal relaxation dynamics in metallic regime an optical-lattice Hubbard model. The transport lifetime induced by inter-particle scattering for a mass current atoms excited stimulated Raman transitions is measured, and corresponding analog resistivity inferred. By exploring range temperature, we demonstrate incompatibility weak-scattering theory key characteristic bad metals: anomalous scaling $T$-linear behavior. also observe onset two...

Abstract Atomic beams are a longstanding technology for atom-based sensors and clocks with widespread use in commercial frequency standards. Here, we report the demonstration chip-scale microwave atomic beam clock using coherent population trapping (CPT) interrogation passively pumped device. The device consists of hermetically sealed vacuum cell fabricated from an anodically bonded stack glass Si wafers. created lithographically defined microcapillary array connected to Rb reservoir 1...

We report on progress in the characterization of systematic shifts chip-scale atomic beam clocks, which offer potential for improved long-term stability relative to existing clocks. Previous work has demonstrated key features devices including use a microfabricated Si/glass cell, passively maintained vacuum environment, and an integrated Rb source. A clock been realized using Ramsey coherent population trapping interrogation with short-term fractional frequency ≈ 1.2 × 10^(-9)at 1 s...

Laser-cooled gases offer an alternative to tip-based methods for generating high-brightness ion beams focused beam applications. These sources produce ions by photoionization of ultracold neutral atoms, where the narrow velocity distribution associated with microkelvin-level temperatures results in a very low emittance, beam. In magneto-optical trap-based source, brightness is ultimately limited transport cold which restricts current that can be extracted from ion-generating volume. We...