Ultracold quantum gases are a leading platform for quantum simulation with targets ranging from exotic materials to the expanding universe. That precision is also a vulnerability. For example, background magnetic fields shift the atoms’ internal energy levels, and even opening …
In situ magnetic-field stabilization for quantum-gas experiments Read more »
A process for removing aberrations in an acquired image from imperfect imaging optics includes: acquiring an acquired image of an object with an imperfect imaging system that includes an imperfect imaging optic, the acquired image including a plurality of pixels; …
The magneto-optical trap (MOT) is a foundational laser-cooling and trapping tool used in modern atomic physics, with applications including atomic clocks and sensors as well as quantum simulators and computers. Before realizing these applications, researchers must have reliable laser cooling …
Nondestructive characterization of laser-cooled atoms using machine learning Read more »
Ian named a Fellow of the American Association for the Advancement of Science (AAAS)! See the JQI article here (https://jqi.umd.edu/news/spielman-named-aaas-fellow) and the official announcement(https://www.aaas.org/page/2025-fellows)!
In 1996, Hatano and Nelson proposed a non-Hermitian lattice model containing an imaginary Peierls phase [Phys. Rev. Lett. 77, 570 (1996)], which subsequent analyses revealed to be an instance of a new class of topological systems. Here, we experimentally realize …
Imaginary Gauge Potentials in a Non-Hermitian Spin-Orbit Coupled Quantum Gas Read more »
Shouvik is heading out to “startup” great things in Hyderabad.
We describe an apparatus that efficiently produces 23Na Bose–Einstein condensates (BECs) in a hybrid trap that combines a quadrupole magnetic field with a far-detuned optical dipole trap. Using a Bayesian optimization framework, we systematically optimize all BEC production parameters in modest-sized …
Efficient production of sodium Bose–Einstein condensates in a hybrid trap Read more »
Instabilities, where small fluctuations seed the formation of large-scale structures, govern dynamics in a variety of fluid systems. The Rayleigh-Taylor instability (RTI), present from tabletop to astronomical scales, is an iconic example characterized by mushroom-shaped incursions appearing when immiscible fluids …
The Rayleigh-Taylor instability in a binary quantum fluid Read more »
Much of our knowledge of quantum systems is encapsulated in the expectation value of Hermitian operators, experimentally obtained by averaging projective measurements. However, dynamical properties are often described by products of operators evaluated at different times; such observables cannot be …
Dynamical structure factor from weak measurements Read more »
