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Quantum reflection of bright matter-wave solitons (2009)
Journal Article
Cornish, S., Parker, N., Martin, A., Judd, T., Scott, R., Fromhold, T., & Adams, C. (2009). Quantum reflection of bright matter-wave solitons. Physica D: Nonlinear Phenomena, 238(15), 1299-1305. https://doi.org/10.1016/j.physd.2008.07.011

We propose the use of bright matter-wave solitons formed from Bose–Einstein condensates with attractive interactions to probe and study quantum reflection from a solid surface at normal incidence. We demonstrate that the presence of attractive intera... Read More about Quantum reflection of bright matter-wave solitons.

A giant electro-optic effect using polarizable dark states (2008)
Journal Article
Mohapatra, A., Bason, M., Butscher, B., Weatherill, K., & Adams, C. (2008). A giant electro-optic effect using polarizable dark states. Nature Physics, 4(11), 890-894. https://doi.org/10.1038/nphys1091

The electro-optic effect, where the refractive index of a medium is modified by an electric field, is of central importance in nonlinear optics, laser technology, quantum optics and optical communications. In general, electro-optic coefficients are v... Read More about A giant electro-optic effect using polarizable dark states.

Electro-optic control of atom-light interactions using Rydberg dark-state polaritons (2008)
Journal Article
Bason, M., Mohapatra, A., Weatherill, K., & Adams, C. (2008). Electro-optic control of atom-light interactions using Rydberg dark-state polaritons. Physical Review A, 77(3), https://doi.org/10.1103/physreva.77.032305

We demonstrate a multiphoton Rydberg dark resonance where a Λ system is coupled to a Rydberg state. This N-type level scheme combines the ability to slow and store light pulses associated with long-lived ground-state superpositions with the strongly... Read More about Electro-optic control of atom-light interactions using Rydberg dark-state polaritons.

Absolute absorption on rubidium D lines: comparison between theory and experiment (2008)
Journal Article
Siddons, P., Adams, C., Ge, C., & Hughes, I. (2008). Absolute absorption on rubidium D lines: comparison between theory and experiment. Journal of Physics B: Atomic, Molecular and Optical Physics, 41(15), Article 155004. https://doi.org/10.1088/0953-4075/41/15/155004

We study the Doppler-broadened absorption of a weak monochromatic probe beam in a thermal rubidium vapour cell on D lines. A detailed model of the susceptibility is developed which takes into account the absolute linestrengths of the allowed electric... Read More about Absolute absorption on rubidium D lines: comparison between theory and experiment.

Collisions of bright solitary matter waves (2008)
Journal Article
Parker, N., Martin, A., Cornish, S., & Adams, C. (2008). Collisions of bright solitary matter waves. Journal of Physics B: Atomic, Molecular and Optical Physics, 41(4), Article 045303. https://doi.org/10.1088/0953-4075/41/4/045303

The collisions of three-dimensional bright solitary matter waves formed from atomic Bose–Einstein condensates are shown to exhibit rich behaviour. Collisions range from being elastic to completely destructive due to the onset of collapse during the i... Read More about Collisions of bright solitary matter waves.

Electromagnetically induced transparency of an interacting cold Rydberg ensemble (2008)
Journal Article
Weatherill, K., Pritchard, J., Abel, R., Bason, M., Mohapatra, A., & Adams, C. (2008). Electromagnetically induced transparency of an interacting cold Rydberg ensemble. Journal of Physics B: Atomic, Molecular and Optical Physics, 41(20), Article 201002. https://doi.org/10.1088/0953-4075/41/20/201002

We study electromagnetically induced transparency (EIT) of a weakly interacting cold Rydberg gas. We show that for Rydberg states with principal quantum numbers in the range n = 19–26, the onset of interactions is manifest as a depopulation of the Ry... Read More about Electromagnetically induced transparency of an interacting cold Rydberg ensemble.

Bright solitary-matter-wave collisions in a harmonic trap: Regimes of solitonlike behavior (2008)
Journal Article
Martin, A., Adams, C., & Gardiner, S. (2008). Bright solitary-matter-wave collisions in a harmonic trap: Regimes of solitonlike behavior. Physical Review A, 77(1), https://doi.org/10.1103/physreva.77.013620

Systems of solitary waves in the one-dimensional Gross-Pitaevskii equation, which models a trapped atomic Bose-Einstein condensate, are investigated theoretically. To analyze the soliton nature of these solitary waves, a particle analogy for the soli... Read More about Bright solitary-matter-wave collisions in a harmonic trap: Regimes of solitonlike behavior.

Coherent optical detection of highly excited Rydberg states using electromagnetically induced transparency (2007)
Journal Article
Mohapatra, A., Jackson, T., & Adams, C. (2007). Coherent optical detection of highly excited Rydberg states using electromagnetically induced transparency. Physical Review Letters, 98, https://doi.org/10.1103/physrevlett.98.113003

We demonstrate coherent optical detection of highly excited Rydberg states (up to n=124) using electromagnetically induced transparency (EIT), providing a direct nondestructive probe of Rydberg energy levels. We show that the EIT spectra allow direct... Read More about Coherent optical detection of highly excited Rydberg states using electromagnetically induced transparency.

Bright matter-wave soliton collisions in a harmonic trap : regular and chaotic dynamics (2007)
Journal Article
Martin, A., Adams, C., & Gardiner, S. (2007). Bright matter-wave soliton collisions in a harmonic trap : regular and chaotic dynamics. Physical Review Letters, 98(2), https://doi.org/10.1103/physrevlett.98.020402

Collisions between bright solitary waves in the 1D Gross-Pitaevskii equation with a harmonic potential, which models a trapped atomic Bose-Einstein condensate, are investigated theoretically. A particle analogy for the solitary waves is formulated an... Read More about Bright matter-wave soliton collisions in a harmonic trap : regular and chaotic dynamics.

Sagnac interferometry in a slow-light medium (2006)
Journal Article
Purves, G., Adams, C., & Hughes, I. (2006). Sagnac interferometry in a slow-light medium. Physical Review A, 74, https://doi.org/10.1103/physreva.74.023805

We use a Sagnac interferometer to measure the dispersive and absorptive properties of room temperature Rubidium vapor on the D2 line at 780.2 nm. We apply a pump beam such that the resulting system exhibits electromagnetically induced transparency. U... Read More about Sagnac interferometry in a slow-light medium.

Mobile atom traps using magnetic nanowires (2006)
Journal Article
Allwood, D., Schrefl, T., Hrkac, G., Hughes, I., & Adams, C. (2006). Mobile atom traps using magnetic nanowires. Applied Physics Letters, 89(1), https://doi.org/10.1063/1.2219397

By solving the Landau-Lifshitz-Gilbert equation using a finite element method we show that an atom trap can be produced above a ferromagnetic nanowire domain wall. Atoms experience trap frequencies of up to a few megahertz, and can be transported by... Read More about Mobile atom traps using magnetic nanowires.

Spatially selective loading of an optical lattice by light-shift engineering using an auxiliary laser field (2006)
Journal Article
Griffin, P., Weatherill, K., MacLeod, S., Potvliege, R., & Adams, C. (2006). Spatially selective loading of an optical lattice by light-shift engineering using an auxiliary laser field. New Journal of Physics, 8(11), https://doi.org/10.1088/1367-2630/8/1/011

I had the idea a long time ago that shifting the excited state energy level using an additional laser could be a useful tool in cold atoms experiments. In this paper we demonstrated experimentally the application of this idea to loading specific site... Read More about Spatially selective loading of an optical lattice by light-shift engineering using an auxiliary laser field.

Emergence and decay of turbulence in stirred atomic Bose-Einstein condensates (2005)
Journal Article
Parker, N., & Adams, C. (2005). Emergence and decay of turbulence in stirred atomic Bose-Einstein condensates. Physical Review Letters, 95(14), https://doi.org/10.1103/physrevlett.95.145301

We show that a ``weak'' elliptical deformation of an atomic Bose-Einstein condensate rotating at close to the quadrupole instability frequency leads to turbulence with a Kolmogorov energy spectrum. The turbulent state is produced by energy transfer t... Read More about Emergence and decay of turbulence in stirred atomic Bose-Einstein condensates.

Fast switching of alkali atom dispensers using laser induced heating (2005)
Journal Article
Griffin, P., Weatherill, K., & Adams, C. (2005). Fast switching of alkali atom dispensers using laser induced heating. Review of Scientific Instruments, 76(9), https://doi.org/10.1063/1.2038167

We show that by using an intense laser source to locally heat an alkali atom dispenser, one can generate a high flux of atoms followed by fast recovery (<100 ms) of the background pressure when the laser is extinguished. For repeated heating pulses a...