epsilon-pseudoclassical model for quantum resonances in a cold dilute atomic gas periodically driven by finite-duration standing-wave laser pulses (2016)
Journal Article
Beswick, B., Hughes, I., Gardiner, S., Astier, H., Andersen, M., & Daszuta, B. (2016). epsilon-pseudoclassical model for quantum resonances in a cold dilute atomic gas periodically driven by finite-duration standing-wave laser pulses. Physical Review A, 94(6), Article 063604. https://doi.org/10.1103/physreva.94.063604

Atom interferometers are a useful tool for precision measurements of fundamental physical phenomena, ranging from the local gravitational-field strength to the atomic fine-structure constant. In such experiments, it is desirable to implement a high-m... Read More about epsilon-pseudoclassical model for quantum resonances in a cold dilute atomic gas periodically driven by finite-duration standing-wave laser pulses.

Cooperative eigenmodes and scattering in one-dimensional atomic arrays (2016)
Journal Article
Bettles, R. J., Gardiner, S. A., & Adams, C. S. (2016). Cooperative eigenmodes and scattering in one-dimensional atomic arrays. Physical Review A, 94(4), Article 043844. https://doi.org/10.1103/physreva.94.043844

Collective coupling between dipoles can dramatically modify the optical response of a medium. Such effects depend strongly on the geometry of the medium and the polarization of the light. Using a classical coupled dipole model, here we investigate th... Read More about Cooperative eigenmodes and scattering in one-dimensional atomic arrays.

Excitation of knotted vortex lines in matter waves (2016)
Journal Article
Maucher, F., Gardiner, S., & Hughes, I. (2016). Excitation of knotted vortex lines in matter waves. New Journal of Physics, 18(6), Article 063016. https://doi.org/10.1088/1367-2630/18/6/063016

We study the creation of knotted ultracold matter waves in Bose–Einstein condensates via coherent two-photon Raman transitions with a Λ level configuration. The Raman transition allows an indirect transfer of atoms from the internal state $| a\rangle... Read More about Excitation of knotted vortex lines in matter waves.

Enhanced optical cross section via collective coupling of atomic dipoles in a 2D array (2016)
Journal Article
Bettles, R. J., Gardiner, S. A., & Adams, C. S. (2016). Enhanced optical cross section via collective coupling of atomic dipoles in a 2D array. Physical Review Letters, 116(10), Article 103602. https://doi.org/10.1103/physrevlett.116.103602

Enhancing the optical cross section is an enticing goal in light-matter interactions, due to its fundamental role in quantum and nonlinear optics. Here, we show how dipolar interactions can suppress off-axis scattering in a two-dimensional atomic arr... Read More about Enhanced optical cross section via collective coupling of atomic dipoles in a 2D array.

Stochastic growth dynamics and composite defects in quenched immiscible binary condensates (2016)
Journal Article
Liu, I., Pattinson, R., Billam, T., Gardiner, S., Cornish, S., Huang, T., …Proukakis, N. (2016). Stochastic growth dynamics and composite defects in quenched immiscible binary condensates. Physical Review A, 93(2), Article 023628. https://doi.org/10.1103/physreva.93.023628

We study the sensitivity of coupled condensate formation dynamics on the history of initial stochastic domain formation in the context of instantaneously quenched elongated harmonically trapped immiscible two-component atomic Bose gases. The spontane... Read More about Stochastic growth dynamics and composite defects in quenched immiscible binary condensates.

Quantum reflection of bright solitary matter waves from a narrow attractive potential (2016)
Journal Article
Marchant, A., Billam, T., Yu, M., Rakonjac, A., Helm, J., Polo, J., …Cornish, S. (2016). Quantum reflection of bright solitary matter waves from a narrow attractive potential. Physical Review A, 93(2), Article 021604(R). https://doi.org/10.1103/physreva.93.021604

We report the observation of quantum reflection from a narrow attractive potential using bright solitary matter waves formed from a Rb 85 Bose-Einstein condensate. We create the attractive potential using a tightly focused, red-detuned laser beam, an... Read More about Quantum reflection of bright solitary matter waves from a narrow attractive potential.

Measuring the disorder of vortex lattices in a Bose-Einstein condensate (2016)
Journal Article
Rakonjac, A., Marchant, A., Billam, T., Helm, J., Yu, M., Gardiner, S., & Cornish, S. (2016). Measuring the disorder of vortex lattices in a Bose-Einstein condensate. Physical Review A, 93(1), Article 013607. https://doi.org/10.1103/physreva.93.013607

We report observations of the formation and subsequent decay of a vortex lattice in a Bose-Einstein condensate confined in a hybrid optical-magnetic trap. Vortices are induced by rotating the anharmonic magnetic potential that provides confinement in... Read More about Measuring the disorder of vortex lattices in a Bose-Einstein condensate.

Superballistic center-of-mass motion in one-dimensional attractive Bose gases: Decoherence-induced Gaussian random walks in velocity space (2016)
Journal Article
Weiss, C., Cornish, S., Gardiner, S., & Breuer, H. (2016). Superballistic center-of-mass motion in one-dimensional attractive Bose gases: Decoherence-induced Gaussian random walks in velocity space. Physical Review A, 93(1), Article 103605. https://doi.org/10.1103/physreva.93.013605

We show that the spreading of the center-of-mass density of ultracold attractively interacting bosons can become superballistic in the presence of decoherence, via one-, two-, and/or three-body losses. In the limit of weak decoherence, we analyticall... Read More about Superballistic center-of-mass motion in one-dimensional attractive Bose gases: Decoherence-induced Gaussian random walks in velocity space.