The goal of Dr. Abraham's research program is to investigate ultracold atoms and molecules. They use a variety of lasers, in addition to magnetic and electric fields, to cool atoms and molecules to nearly absolute zero (tens of microKelvin). At these temperatures, thee wave-like nature of matter is enhanced allowing studies of their exotic, quantum-mechanical nature.
Dr. Abraham currently studies Feshbach Optimized photoassociation, where ultracold atoms undergo a collisional resonance. During the resonant collision, a photon binds them together into an excited-state molecule, allowing molecular spectroscopy inaccessible with any other method.
Another project uses the ultracold atoms as a non-linear medium for quantum optics experiment studying electromagnetically induced transparency (EIT), a common method of precision measurement. The research explores EIT, using lasers with orbital angular momentum.
"Optimization of electromagnetically induced transparency by changing the radial size of Laguerre–Gaussian laser modes," T. G. Akin, S. P. Krzyzewski, M. Holtfrerich, and E. R. I. Abraham, Journal of the Optical Society of America B, 34, 1286-1293, (2017) DOI: 10.1364/JOSAB.34.001286
"Electromagnetically induced transparency with Laguerre–Gaussian modes in ultracold rubidium," T.G. Akin, S.P. Krzyzewski, A.M. Marino, E.R.I.Abraham, Optics Communications, 2015, 209-215, (2015) DOI: 10.1016/j.optcom.2014.11.049
"Confinement of ultracold atoms in a Laguerre–Gaussian laser beam created with diffractive optics," Sharon A. Kennedy, G.W. Biedermann, J.T. Farrar, T.G. Akin, S.P. Krzyzewski, E.R.I. Abraham, Optics Communications, 321, 110-115, (2014) DOI: 10.1016/j.optcom.2014.01.084
"A clip-on Zeeman slower using toroidal permanent magnets," S. P. Krzyzewski, T. G. Akin, Parshuram Dahal, and E. R. I. Abraham, Review of Scientific Instruments, 85, 103104, (2014) DOI: 10.1063/1.4897151
"Bose-Einstein condensation transition studies for atoms confined in Laguerre-Gaussian laser modes," T.G. Akin, S.A. Kennedy, B. Dribus, J.L. Marzoula, L. Johnson, J. Alexander, and E.R.I. Abraham, Opt. Comm., 84, 285, (2012) ADS: 2012OptCo.285...84A DOI: 10.1016/j.optcom.2011.09.011
"Experimental and theoretical investigation of the Stark effect for trapping cold molecules: Application to nitric oxide," B. J. Bichsel, M. A. Morrison, N. E. Shafer-Ray and E. R. I. Abraham, Phys. Rev. A, 75, 023410, (2007) ADS: 2007PhRvA..75b3410B
"Impossibility of a biased Stark trap in two dimensions," S. A. Meek, E. R. I. Abraham, and N. E. Shafer-Ray, Phys. Rev. A, 71, 065402, (2005) ADS: 2005PhRvA..71f5402M