We experimentally demonstrate a novel scheme to simultaneously confine two atomic species of (87)Rb and (133)Cs with adjustable spatial separation by a controllable double-well magneto-optic trap. Using a single-loop wire and a magnetic bias field, the two clouds, each containing more than 1 x 10(6) atoms, are spatially separated above and below the wire center of the double-well MOT. The cloud interdistance can be controlled by independently varying the wire current and external bias field. This allows to load the double-well magnetic trap, and to study the dynamics of cold collisions between two-species atoms.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1364/oe.16.006104 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Probing London Dispersion in Proton-Bound Onium Ions: Are Alkyl-Alkyl Steric Interactions Reliably Modeled?
J Am Chem Soc
January 2025
Laboratorium für Organische Chemie, Department of Chemistry and Applied Biosciences, ETH Zürich, Zürich 8093, Switzerland.
We report spectroscopic and spectrometric experiments that probe the London dispersion interaction between -butyl substituents in three series of covalently linked, protonated -pyridines in the gas phase. Molecular ions in the three test series, along with several reference molecules for control, were electrosprayed from solution into the gas phase and then probed by infrared multiphoton dissociation spectroscopy and trapped ion mobility spectrometry. The observed N-H stretching frequencies provided an experimental readout diagnostic of the ground-state geometry of each ion, which could be furthermore compared to a second, independent structural readout via the collision cross section.
View Article and Find Full Text PDFFloquet-Driven Crossover from Density-Assisted Tunneling to Enhanced Pair Tunneling.
Phys Rev Lett
December 2024
Physikalisches Institut, University of Bonn, 53115 Bonn, Germany.
We investigate the experimental control of pair tunneling in a double-well potential using Floquet engineering. We demonstrate a crossover from a regime with density-assisted tunneling to dominant pair tunneling by tuning the effective interactions. Furthermore, we show that the pair tunneling rate can be enhanced not only compared to the Floquet-reduced single-particle tunneling but even beyond the static superexchange rate, while keeping the effective interaction in a relevant range.
View Article and Find Full Text PDFA Roadmap for Simulating Chemical Dynamics on a Parametrically Driven Bosonic Quantum Device.
J Phys Chem Lett
December 2024
Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States.
Article Synopsis
- The study explores simulating chemical reaction dynamics using a superconducting Kerr-cat device, focusing on proton-transfer reactions across a free energy barrier.
- Traditional rate theories miss crucial aspects like quantum tunneling and recrossing, which this study aims to address.
- Results show the approach effectively replicates dynamics in benchmark systems like malonaldehyde dimers and DNA base pairs, showcasing its potential for advanced chemical reaction simulations.
Beyond Linear Response: Equivalence between Thermodynamic Geometry and Optimal Transport.
Phys Rev Lett
August 2024
Department of Physics, University of California, Berkeley, Berkeley, California 94720, USA.
A fundamental result of thermodynamic geometry is that the optimal, minimal-work protocol that drives a nonequilibrium system between two thermodynamic states in the slow-driving limit is given by a geodesic of the friction tensor, a Riemannian metric defined on control space. For overdamped dynamics in arbitrary dimensions, we demonstrate that thermodynamic geometry is equivalent to L^{2} optimal transport geometry defined on the space of equilibrium distributions corresponding to the control parameters. We show that obtaining optimal protocols past the slow-driving or linear response regime is computationally tractable as the sum of a friction tensor geodesic and a counterdiabatic term related to the Fisher information metric.
View Article and Find Full Text PDFA nonlinear journey from structural phase transitions to quantum annealing.
Chaos
May 2024
Center for Nonlinear Studies and Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
Motivated by an exact mapping between equilibrium properties of a one-dimensional chain of quantum Ising spins in a transverse field (the transverse field Ising (TFI) model) and a two-dimensional classical array of particles in double-well potentials (the "ϕ4 model") with weak inter-chain coupling, we explore connections between the driven variants of the two systems. We argue that coupling between the fundamental topological solitary waves in the form of kinks between neighboring chains in the classical ϕ4 system is the analog of the competing effect of the transverse field on spin flips in the quantum TFI model. As an example application, we mimic simplified measurement protocols in a closed quantum model system by studying the classical ϕ4 model subjected to periodic perturbations.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!