dorsal/arxiv
View SchemaEffective magnetic fields induced by EIT in ultra-cold atomic gases
| Authors | G. Juzeliunas, J. Ruseckas, P. Ohberg |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0511087 |
| URL | https://arxiv.org/abs/quant-ph/0511087 |
| DOI | 10.1088/0953-4075/38/23/001 |
| Journal | J. Phys. B: At. Mol. Opt. Phys. 38 (2005) 4171-4183 |
Abstract
We study the influence of two resonant laser beams (to be referred to as the control and probe beams) on the centre of mass motion of ultra-cold atoms characterised by three energy levels of the Lambda-type. The laser beams being in the Electromagnetically Induced Transparency (EIT) configuration drive the atoms to their dark states. We impose the adiabatic approximation and obtain an effective equation of motion for the dark state atoms. The equation contains a vector potential type interaction as well as an effective trapping potential. We concentrate on the situation where the control and probe beams are co-propagating and have Orbital Angular Momenta (OAM). The effective magnetic field is then oriented along the propagation direction of the control and probe beams. Its spatial profile can be shaped by choosing proper laser beams. We analyse several situations where the effective magnetic field exhibits a radial dependence. In particular we study effective magnetic fields induced by Bessel beams, and demonstrate how to generate a constant effective magnetic field for a ring geometry of the atomic trap. We also discuss a possibility to create an effective field of a magnetic monopole.
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"abstract": "We study the influence of two resonant laser beams (to be referred to as the\ncontrol and probe beams) on the centre of mass motion of ultra-cold atoms\ncharacterised by three energy levels of the Lambda-type. The laser beams being\nin the Electromagnetically Induced Transparency (EIT) configuration drive the\natoms to their dark states. We impose the adiabatic approximation and obtain an\neffective equation of motion for the dark state atoms. The equation contains a\nvector potential type interaction as well as an effective trapping potential.\nWe concentrate on the situation where the control and probe beams are\nco-propagating and have Orbital Angular Momenta (OAM). The effective magnetic\nfield is then oriented along the propagation direction of the control and probe\nbeams. Its spatial profile can be shaped by choosing proper laser beams. We\nanalyse several situations where the effective magnetic field exhibits a radial\ndependence. In particular we study effective magnetic fields induced by Bessel\nbeams, and demonstrate how to generate a constant effective magnetic field for\na ring geometry of the atomic trap. We also discuss a possibility to create an\neffective field of a magnetic monopole.",
"arxiv_id": "quant-ph/0511087",
"authors": [
"G. Juzeliunas",
"J. Ruseckas",
"P. Ohberg"
],
"categories": [
"quant-ph",
"cond-mat.soft"
],
"doi": "10.1088/0953-4075/38/23/001",
"journal_ref": "J. Phys. B: At. Mol. Opt. Phys. 38 (2005) 4171-4183",
"title": "Effective magnetic fields induced by EIT in ultra-cold atomic gases",
"url": "https://arxiv.org/abs/quant-ph/0511087"
},
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