Third year review postponed due to Government shutdown
The third year review for the Atomtronics MURI has been postponed. Stay tuned.
Category: Atomtronics
Magnetically Generated Spin-Orbit Coupling for Ultracold Atoms
We present a new technique for producing two- and three-dimensional Rashba-type spin-orbit couplings for ultracold atoms without involving light. The method relies on a sequence of pulsed inhomogeneous magnetic fields imprinting suitable phase gradients on the atoms. For sufficiently short …
Magnetically Generated Spin-Orbit Coupling for Ultracold Atoms Read more »
Third year review scheduled
Third year review on Oct. 9-10 the atomtronics MURI, and like with last year the review will be a 1.5 day event. Approximate times: starting at 1:00 PM on the 9th, and ending at 5PM on the 10th. The location …
Three-dimensional spin–orbit coupling in a trap
We investigate the properties of an atom under the influence of a synthetic three-dimensional spin–orbit coupling (Weyl coupling) in the presence of a harmonic trap. The conservation of total angular momentum provides a numerically efficient scheme for finding the spectrum …
Heavy solitons in a fermionic superfluid
Solitons—solitary waves that maintain their shape as they propagate—occur as water waves in narrow canals, as light pulses in optical fibres and as quantum mechanical matter waves in superfluids and superconductors. Their highly nonlinear and localized nature makes them very …
The spin Hall effect in a quantum gas
Electronic properties such as current flow are generally independent of the electron’s spin angular momentum, an internal degree of freedom possessed by quantum particles. The spin Hall effect, first proposed 40 years ago, is an unusual class of phenomena in …
Topological Zero-Energy Modes in Gapless Commensurate Aubry-André-Harper Models
The Aubry-André or Harper (AAH) model has been the subject of extensive theoretical research in the context of quantum localization. Recently, it was shown that one-dimensional quasicrystals described by the incommensurate AAH model has a nontrivial topology. In this Letter, …
Topological Zero-Energy Modes in Gapless Commensurate Aubry-André-Harper Models Read more »
Integrated optical dipole trap for cold neutral atoms with an optical waveguide coupler
An integrated optical dipole trap uses two-color (red and blue-detuned) traveling evanescent wave fields for trapping cold neutral atoms. To achieve longitudinal confinement, we propose using an integrated optical waveguide coupler, which provides a potential gradient along the beam propagation …
Integrated optical dipole trap for cold neutral atoms with an optical waveguide coupler Read more »
Universal Rephasing Dynamics after a Quantum Quench via Sudden Coupling of Two Initially Independent Condensates
We consider a quantum quench in which two initially independent condensates are suddenly coupled and study the subsequent “rephasing” dynamics. For weak tunneling couplings, the time evolution of physical observables is predicted to follow universal scaling laws, connecting the short-time …
Review: Spin-orbit coupling in atomic gases
Spin–orbit coupling links a particle’s velocity to its quantum-mechanical spin, and is essential in numerous condensed matter phenomena, including topological insulators and Majorana fermions. In solid-state materials, spin–orbit coupling originates from the movement of electrons in a crystal’s intrinsic electric …