Soliton Interferometry with Very Narrow Barriers Obtained from Spatially Dependent Dressed States (2022)
Journal Article
Grimshaw, C. L., Billam, T. P., & Gardiner, S. A. (2022). Soliton Interferometry with Very Narrow Barriers Obtained from Spatially Dependent Dressed States. Physical Review Letters, 129(4), Article 040401. https://doi.org/10.1103/physrevlett.129.040401

Bright solitons in atomic Bose-Einstein condensates are strong candidates for high precision matter-wave interferometry, as their inherent stability against dispersion supports long interrogation times. An analog to a beam splitter is then a narrow p... Read More about Soliton Interferometry with Very Narrow Barriers Obtained from Spatially Dependent Dressed States.

Quantum emission of light with densely packed driven dipoles (2022)
Journal Article
Ribeiro, S., & Gardiner, S. A. (2022). Quantum emission of light with densely packed driven dipoles. Physical Review A, 105(2), Article L021701. https://doi.org/10.1103/physreva.105.l021701

Collective excitations in regular structures of strongly interacting driven dipoles have been found to lead to strongly antibunched statistics of the emitted photons [g(2)(0) 0.5], but precise control of the number of emitters and their spatial distr... Read More about Quantum emission of light with densely packed driven dipoles.

Roadmap on Atomtronics: State of the art and perspective (2021)
Journal Article
Amico, L., Boshier, M., Birkl, G., Minguzzi, A., Miniatura, C., Kwek, L., …Yakimenko, A. (2021). Roadmap on Atomtronics: State of the art and perspective. AVS Quantum Science, 3(3), Article 039201. https://doi.org/10.1116/5.0026178

Atomtronics deals with matter-wave circuits of ultracold atoms manipulated through magnetic or laser-generated guides with different shapes and intensities. In this way, new types of quantum networks can be constructed in which coherent fluids are co... Read More about Roadmap on Atomtronics: State of the art and perspective.

Collective effects in the photon statistics of thermal atomic ensembles (2021)
Journal Article
Ribeiro, S., Cutler, T. F., Adams, C. S., & Gardiner, S. A. (2021). Collective effects in the photon statistics of thermal atomic ensembles. Physical Review A, 104(1), Article 013719. https://doi.org/10.1103/physreva.104.013719

We investigate the collective scattering of coherent light from a thermal alkali-metal vapor with temperatures ranging from 350 to 450 K, corresponding to average atomic spacings between 0.7 λ and 0.1 λ. We develop a theoretical model treating the at... Read More about Collective effects in the photon statistics of thermal atomic ensembles.

Quantum and nonlinear effects in light transmitted through planar atomic arrays (2020)
Journal Article
Bettles, R. J., Lee, M. D., Gardiner, S. A., & Ruostekoski, J. (2020). Quantum and nonlinear effects in light transmitted through planar atomic arrays. Communications Physics, 3(1), Article 141. https://doi.org/10.1038/s42005-020-00404-3

Understanding strong cooperative optical responses in dense and cold atomic ensembles is vital for fundamental science and emerging quantum technologies. Methodologies for characterizing light-induced quantum effects in such systems, however, are sti... Read More about Quantum and nonlinear effects in light transmitted through planar atomic arrays.

Splitting of two-component solitary waves from collisions with narrow potential barriers (2020)
Journal Article
Grimshaw, C. L., Gardiner, S. A., & Malomed, B. A. (2020). Splitting of two-component solitary waves from collisions with narrow potential barriers. Physical Review A, 101(4), Article 043623. https://doi.org/10.1103/physreva.101.043623

We consider the interaction of two-component bright-bright solitons with a narrow potential barrier (splitter) in the framework of a system of two Gross-Pitaevskii (nonlinear-Schrödinger) equations modeling a binary Bose-Einstein condensate, with sel... Read More about Splitting of two-component solitary waves from collisions with narrow potential barriers.

Splitting and recombination of bright-solitary-matter waves (2020)
Journal Article
Wales, O. J., Rakonjac, A., Billam, T. P., Helm, J. L., Gardiner, S. A., & Cornish, S. L. (2020). Splitting and recombination of bright-solitary-matter waves. Communications Physics, 3, Article 51. https://doi.org/10.1038/s42005-020-0320-8

Atomic Bose–Einstein condensates confined in quasi-1D waveguides can support bright-solitary-matter waves when interatomic interactions are sufficiently attractive to cancel dispersion. Such solitary-matter waves are excellent candidates for highly s... Read More about Splitting and recombination of bright-solitary-matter waves.

Spin–orbit coupling in the presence of strong atomic correlations (2020)
Journal Article
Usui, A., Fogarty, T., Campbell, S., Gardiner, S. A., & Busch, T. (2020). Spin–orbit coupling in the presence of strong atomic correlations. New Journal of Physics, 22(1), Article 013050. https://doi.org/10.1088/1367-2630/ab6576

We explore the influence of contact interactions on a synthetically spin–orbit coupled system of two ultracold trapped atoms. Even though the system we consider is bosonic, we show that a regime exists in which the competition between the contact and... Read More about Spin–orbit coupling in the presence of strong atomic correlations.

Lattice-depth measurement using continuous grating atom diffraction (2019)
Journal Article
Beswick, B. T., Hughes, I. G., & Gardiner, S. A. (2019). Lattice-depth measurement using continuous grating atom diffraction. Physical Review A, 100(6), Article 063629. https://doi.org/10.1103/physreva.100.063629

We propose an approach to characterizing the depths of optical lattices, in which either an atomic gas is given a finite initial momentum or, alternatively, a corresponding “walking” configuration is applied to the optical lattice itself. This leads... Read More about Lattice-depth measurement using continuous grating atom diffraction.

An intuitive approach to structuring the three electric field components of light (2019)
Journal Article
Maucher, F., Skupin, S., Gardiner, S., & Hughes, I. (2019). An intuitive approach to structuring the three electric field components of light. New Journal of Physics, 21, Article 013032. https://doi.org/10.1088/1367-2630/aaf711

This paper presents intuitive interpretations of tightly focused beams of light by drawing analogies with two-dimensional electrostatics, magnetostatics and fluid dynamics. We use a Helmholtz decomposition of the transverse electric field components... Read More about An intuitive approach to structuring the three electric field components of light.

Lattice-depth measurement using multipulse atom diffraction in and beyond the weakly diffracting limit (2019)
Journal Article
Beswick, B. T., Hughes, I. G., & Gardiner, S. A. (2019). Lattice-depth measurement using multipulse atom diffraction in and beyond the weakly diffracting limit. Physical Review A, 99(1), Article 013614. https://doi.org/10.1103/physreva.99.013614

Precise knowledge of optical lattice depths is important for a number of areas of atomic physics, most notably in quantum simulation, atom interferometry, and for the accurate determination of transition matrix elements. In such experiments, lattice... Read More about Lattice-depth measurement using multipulse atom diffraction in and beyond the weakly diffracting limit.

Noise-free generation of bright matter-wave solitons (2018)
Journal Article
Edmonds, M., Billam, T., Gardiner, S., & Busch, T. (2018). Noise-free generation of bright matter-wave solitons. Physical Review A, 98(6), Article 063626. https://doi.org/10.1103/physreva.98.063626

We show how access to sufficiently flexible trapping potentials could be exploited in the generation of three-dimensional atomic bright matter-wave solitons. Our proposal provides a route towards producing bright solitonic states with good fidelity,... Read More about Noise-free generation of bright matter-wave solitons.

Creating Complex Optical Longitudinal Polarization Structures (2018)
Journal Article
Maucher, F., Skupin, S., Gardiner, S., & Hughes, I. (2018). Creating Complex Optical Longitudinal Polarization Structures. Physical Review Letters, 120(16), Article 163903. https://doi.org/10.1103/physrevlett.120.163903

In this Letter, we show that it is possible to structure the longitudinal polarization component of light. We illustrate our approach by demonstrating linked and knotted longitudinal vortex lines acquired upon nonparaxially propagating a tightly focu... Read More about Creating Complex Optical Longitudinal Polarization Structures.

Spin-Orbit-Coupled Interferometry with Ring-Trapped Bose-Einstein Condensates (2018)
Journal Article
Helm, J., Billam, T., Rakonjac, A., Cornish, S., & Gardiner, S. (2018). Spin-Orbit-Coupled Interferometry with Ring-Trapped Bose-Einstein Condensates. Physical Review Letters, 120(6), Article 063201. https://doi.org/10.1103/physrevlett.120.063201

We propose a method of atom interferometry using a spinor Bose-Einstein condensate with a timevarying magnetic field acting as a coherent beam splitter. Our protocol creates long-lived superpositional counterflow states, which are of fundamental inte... Read More about Spin-Orbit-Coupled Interferometry with Ring-Trapped Bose-Einstein Condensates.

Resonant transfer of large momenta from finite-duration pulse sequences (2017)
Journal Article
Fekete, J., Chai, S., Gardiner, S., & Andersen, M. (2017). Resonant transfer of large momenta from finite-duration pulse sequences. Physical Review A, 95(3), Article 033601. https://doi.org/10.1103/physreva.95.033601

We experimentally investigate the atom optics kicked particle at quantum resonance using finite duration kicks. Even though the underlying process is quantum interference, it can be well described by an ε -pseudoclassical model. The ε -pseudoclassica... Read More about Resonant transfer of large momenta from finite-duration pulse sequences.

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.