aqora

Development of the atom laser

Nicholas P. Robins, C. Figl, Matthew Jeppesen +2 more

We discuss recent developments in our laboratory, in particular focusing on continuous Raman output coupling. We show how recent advances allow the atom laser beam quality to approaching the Heisenberg limit.

Quantum-Atom Optics Downunder (QAO)Jan 1, 20070 citations

Approaching the Heisenberg limit in an atom laser

Matthew Jeppesen, Julien Dugué, G. R. Dennis +4 more

We present experimental and theoretical results showing the improved beam quality and reduced divergence of an atom laser produced by an optical Raman transition, compared to one produced by an rf transition. We show that Raman outcoupling can eliminate the diverging lens effect that the condensate has on the outcoupled atoms. This substantially improves the beam quality of the atom laser, and the improvement may be greater than a factor of 10 for experiments with tight trapping potentials. We show that Raman outcoupling can produce atom lasers whose quality is only limited by the wave function shape of the condensate that produces them, typically a factor of 1.3 above the Heisenberg limit.We present experimental and theoretical results showing the improved beam quality and reduced divergence of an atom laser produced by an optical Raman transition, compared to one produced by an rf transition. We show that Raman outcoupling can eliminate the diverging lens effect that the condensate has on the outcoupled atoms. This substantially improves the beam quality of the atom laser, and the improvement may be greater than a factor of 10 for experiments with tight trapping potentials. We show that Raman outcoupling can produce atom lasers whose quality is only limited by the wave function shape of the condensate that produces them, typically a factor of 1.3 above the Heisenberg limit.

arXiv:0704.0291Physical Review AJun 19, 200825 citations

Progress towards a continuous atom laser

Mallory Traxler, Cornelius Hempel, Varun Vaidya +1 more

Bulletin of the American Physical SocietyMay 20, 20090 citations

Topological Atom Laser

P. B. Blakie, R. J. Ballagh, Charles W. Clark

We demonstrate how a topological atom laser can be realized by output coupling a trapped vortex state with a Raman scattering process. We find a linearized analytic solution from which a generalized resonance condition for Raman output coupling is developed. Using numerical simulations of a two component Gross-Pitaevskii equation in two and three dimensions the output beam from a trapped central vortex state is analyzed for cases of pulsed and continuous coupling where the vortex core is either transverse or parallel to the direction of propagation. We show how the parameters of the Raman light fields control the spatial phase of the output beam.We demonstrate how a topological atom laser can be realized by output coupling a trapped vortex state with a Raman scattering process. We find a linearized analytic solution from which a generalized resonance condition for Raman output coupling is developed. Using numerical simulations of a two component Gross-Pitaevskii equation in two and three dimensions the output beam from a trapped central vortex state is analyzed for cases of pulsed and continuous coupling where the vortex core is either transverse or parallel to the direction of propagation. We show how the parameters of the Raman light fields control the spatial phase of the output beam.

arXiv:cond-mat/0301554Jan 28, 20030 citations

Towards a continuous atom laser

David Guéry-Odelin

APSMay 1, 20030 citations

Continuous Progress on Atom Lasers

Tilman Pfau

Since the first experiments on Bose-Einstein condensates, researchers have tried to use them to make atom lasers. But although pulsed lasers have been demonstrated, continuous atom laser operation has been elusive. In his Perspective, [Pfau][1] highlights the report by [ Chikkatur et al .][2], who have overcome the problem with a conceptually simple but technically challenging apparatus. The challenge now is to develop high power atom lasers. [1]: http://www.sciencemag.org/cgi/content/full/296/5576/2155 [2]: http://www.sciencemag.org/cgi/content/short/296/5576/2193Since the first experiments on Bose-Einstein condensates, researchers have tried to use them to make atom lasers. But although pulsed lasers have been demonstrated, continuous atom laser operation has been elusive. In his Perspective, [Pfau][1] highlights the report by [ Chikkatur et al .][2], who have overcome the problem with a conceptually simple but technically challenging apparatus. The challenge now is to develop high power atom lasers. [1]: http://www.sciencemag.org/cgi/content/full/296/5576/2155 [2]: http://www.sciencemag.org/cgi/content/short/296/5576/2193

ScienceJun 21, 20023 citations

Development of the atom laser

Abstract

Related papers

Development of the atom laser

Abstract

Related papers