Recent Publications

Recent advances in cold atom interferometry with optical and magnetic atom guides have set the stage for quantum inertial sensors capable of operating in dynamic environments. In this work, we present three key innovations—evanescent-field (EF) atom guides, optical nanofiber testbeds, and membrane-waveguide photonic integrated circuit (PIC) platforms—to advance EF-guided atom interferometry. First, we demonstrate EF...

Examples of this disclosure include operating an AIG system to determine rotation rates by generating a light-pulse atom interferometry (LPAI) beam modulated at a modulation frequency and directing the LPAI beam through a beam splitter to thereby split the LPAI beam into three LPAI pulses directed to an interrogation zone of a vacuum. Examples further...

We propose a unifying framework for nonequilibrium relaxation dynamics in ensembles of positionally disordered interacting quantum spins based on the statistical properties, such as mean and variance, of the underlying disorder distribution. Our framework is validated through extensive exact numerical calculations and we use it to disentangle and understand the importance of dimensionality and interaction...

We demonstrate a strontium thermal-beam atom interferometer gyroscope (AIG) on a rotation table using the - intercombination line, and we measure large rotation rates exceeding 6 rad/s. Our demonstration relies upon a transit-time-resonant phase-modulation technique for detecting the AIG phase, which rejects signal background and variations in fringe amplitude.

We present an experimental, numerical, and analytical study of strontium magneto-optical-trap (MOT) loading from a cold atomic beam in a configuration optimized for high numerical aperture optical tweezers. Our approach orients the beam flow along the MOT symmetry axis to reduce the experimental complexity and maximize the overall optical access into the scientific region of...

the present invention relates to a sensor head for use in atom interferometry, and in particular, to a compact sensor head that can be used to generate a grating-based magneto-optical trap with minimal alignment of the components.

2022-02-04 Assigned to NATIONAL TECHNOLOGY & ENGINEERING SOLUTIONS OF SANDIA, LLC reassignment NATIONAL TECHNOLOGY & ENGINEERING SOLUTIONS OF SANDIA, LLC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KEMME, SHANALYN A., SCHWINDT, PETER, BIEDERMANN, GRANT, LEE, JONGMIN, MCGUINNESS, HAYDEN JAMES EVANS

Using a high-performance suppressed-carrier silicon photonic single-sideband modulator at 1560nm, we demonstrate cold atom generation, state-selective detection, and atom interferometer fringes estimating gravitational acceleration, g≈ 9.77±0.01 m/s 2, in a Rubidium atom system.

We present an experimental, numerical, and analytical study of a strontium magneto-optical trap (MOT) loaded from an effusive oven in a configuration optimized for high numerical aperture optical tweezers. Our approach orients the cold atom flux along the MOT symmetry axis to reduce the experimental complexity and maximize the overall optical access into the scientific...

We propose a unifying framework for non-equilibrium relaxation dynamics in ensembles of positionally disordered interacting quantum spins based on the statistical properties, such as mean and variance, of the underlying disorder distribution. Our framework is validated through extensive exact numerical calculations and we use it to disentangle and understand the importance of dimensionality and interaction...

We study the tractability of classically simulating critical phenomena in the quench dynamics of one-dimensional transverse field Ising models (TFIMs) using highly truncated matrix product states (MPSs). We focus on two paradigmatic examples: a dynamical quantum phase transition (DQPT) that occurs in nonintegrable long-range TFIMs, and the infinite-time correlation length of the integrable nearest-neighbor TFIM...

Dynamic polarizabilities of cesium Rydberg states, explicitly , and , where the principal quantum number is 40–70, are presented for linearly polarized light. The dynamic polarizability is calculated using the sum-over-state approach. We identify double magic wavelengths in the range of nm for simultaneous trapping of the ground state and a Rydberg state, which are...

We theoretically investigate the out-of-equilibrium dynamics of irregular one- and two-dimensional arrays of Rydberg dipoles featuring spatially anisotropic interactions. Starting from a collectively polarized initial state, we map out the dynamical phase diagram and identify a crossover between regimes of regular and anomalously slow relaxation of the initial collective order that strongly depends on both...

The laser system is the most complex component of a light-pulse atom interferometer (LPAI), controlling frequencies and intensities of multiple laser beams to configure quantum gravity and inertial sensors. Its main functions include cold-atom generation, state preparation, state-selective detection, and generating a coherent two-photon process for the light-pulse sequence. To achieve substantial miniaturization and ruggedization,...

We demonstrate an atom interferometer gyroscope (AIG) using a strontium thermal beam. Our compact AIG consists of a stream of strontium atoms interacting with three laser pulses that split and recombine the matterwave flux to create a Mach-Zhender interferometer sensitive to rotation. This system requires no cooling, no state preparation, and requires no microwave components....

The complex behavior of quantum many-body physics unveils insights into information propagation and the susceptibility of these systems to external perturbations, defects and noise. To explore these questions, we are developing a Rydberg quantum simulator with neutral cesium atoms, demonstrating tunable interactions and flexible geometries. We present our latest experimental efforts on probing the trade-off...

In recent years, Rydberg atoms have been used in various fields of physics due to their long lifetime and large polarizability. We present a theoretical framework for determining the dynamic polarizability of an atomic Rydberg state for trapping light with finite angular momentum, ie, vortex light. The dependence of the dynamic polarizability of various atomic...

When a highly excited atomic state with a large principal quantum number is occupied by a valence electron, the state is referred to as a Rydberg state. Rydberg states have intriguing and intrinsic features, such as large size, transition dipole moment, polarizability, and long lifetime, which have applications in various branches of physics. Here we...

Qubit-based quantum simulators have demonstrated success in investigating quantum magnetism and non-equilibrium many-body phenomena. The emerging control of atomic systems featuring rich multi-level internal structure, presents new prospects for quantum simulation with higher-dimensional spin systems. Here, we explore new opportunities for quantum simulation and non-equilibrium many body dynamics using three-level Rydberg atoms in a programmable...

Quantum synchronization is the quantum analog of its classical counterpart, a phenomenon describing the entrainment of self-sustained oscillators due to their interactions. In the quantum view, an atom in an optical tweezer potential can have its motional states coupled by a resonant drive between different spin levels and then can be synchronized by introducing linear...