Logan E. Hillberry
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View article: Narrowline Laser Cooling and Spectroscopy of Molecules via Stark States
Narrowline Laser Cooling and Spectroscopy of Molecules via Stark States Open
The electronic energy level structure of yttrium monoxide (YO) provides a long-lived, low-lying 2 Δ state ideal for high-precision molecular spectroscopy, narrowline laser cooling at the single photon-recoil limit, and studying dipola…
View article: Sagnac-witnessed laser deflection is an ultra-sensitive acoustic detector
Sagnac-witnessed laser deflection is an ultra-sensitive acoustic detector Open
Laser-deflection-based acoustic sensing is known for high bandwidth but low sensitivity. By embedding the sensing laser within a Sagnac interferometer and incorporating split-beam detection—originally developed for optical trapping microsc…
View article: Integrability of Goldilocks quantum cellular automata
Integrability of Goldilocks quantum cellular automata Open
Goldilocks quantum cellular automata (QCA) have been simulated on quantum hardware and produce emergent small-world correlation networks. In Goldilocks QCA, a single-qubit unitary is applied to each qubit in a one-dimensional chain subject…
View article: Zooming in on brownian motion with optical trapping microscopy
Zooming in on brownian motion with optical trapping microscopy Open
Optical trapping microscopy unravels open questions in statistical physics by making ultraprecise measurements of Brownian motion in diverse fluid environments. Moreover, the advent of pulsed lasers promises to push the boundaries even fur…
View article: Optically-trapped microspheres are high-bandwidth acoustic transducers
Optically-trapped microspheres are high-bandwidth acoustic transducers Open
We report on the use of an optically-trapped microsphere as an acoustic transducer. A model for the hydrodynamic coupling between the microsphere and the surrounding acoustic fluid flow is combined with thermo-mechanical calibration of the…
View article: Efficient cooling of high-angular-momentum atoms
Efficient cooling of high-angular-momentum atoms Open
We propose a highly efficient and fast method of translational cooling for high-angular-momentum atoms. Optical pumping and stimulated transitions, combined with magnetic forces, can be used to compress phase-space density, and the efficie…
View article: Efficient cooling of high-angular-momentum atoms
Efficient cooling of high-angular-momentum atoms Open
We propose a highly efficient and fast method of translational cooling for high-angular-momentum atoms. Optical pumping and stimulated transitions, combined with magnetic forces, can be used to compress phase-space density, and the efficie…
View article: Small-world complex network generation on a digital quantum processor
Small-world complex network generation on a digital quantum processor Open
Quantum cellular automata (QCA) evolve qubits in a quantum circuit depending only on the states of their neighborhoods and model how rich physical complexity can emerge from a simple set of underlying dynamical rules. The inability of clas…
View article: Entangled quantum cellular automata, physical complexity, and Goldilocks rules
Entangled quantum cellular automata, physical complexity, and Goldilocks rules Open
Cellular automata are interacting classical bits that display diverse emergent behaviors, from fractals to random-number generators to Turing-complete computation. We discover that quantum cellular automata (QCA) can exhibit complexity in …
View article: Entangled quantum cellular automata, physical complexity, and Goldilocks rules
Entangled quantum cellular automata, physical complexity, and Goldilocks rules Open
Cellular automata are interacting classical bits that display diverse emergent behaviors, from fractals to random-number generators to Turing-complete computation. We discover that quantum cellular automata (QCA) can exhibit complexity in …
View article: Weighing an optically trapped microsphere in thermal equilibrium with air
Weighing an optically trapped microsphere in thermal equilibrium with air Open
We report a weighing metrology experiment of a single silica microsphere optically trapped and immersed in air. Based on fluctuations about thermal equilibrium, three different mass measurements are investigated, each arising from one of t…
View article: Entanglement and complexity in quantum elementary cellular automata
Entanglement and complexity in quantum elementary cellular automata Open
Complexity is an intuitively recognized feature of nature, but where does it come from? Is complexity only apparent at the classical level, or can it be found at the underlying quantum level as well? We approach these questions by explorin…