Three Dimensional Raman Cooling using Velocity Selective Rapid Adiabatic Passage
We present a new and efficient implementation of Raman cooling of trapped atoms. It uses Raman pulses with an appropriate frequency chirp to realize a velocity selective excitation through a rapid adiabatic passage. This method allows to address in a single pulse a large number of non zero atomic ve...
| Main Authors: | , , , |
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| Format: | Book section |
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2011
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| _version_ | 1797095854307278848 |
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| author | Kuhn, A Perrin, H Hänsel, W Salomon, C |
| author_facet | Kuhn, A Perrin, H Hänsel, W Salomon, C |
| author_sort | Kuhn, A |
| collection | OXFORD |
| description | We present a new and efficient implementation of Raman cooling of trapped atoms. It uses Raman pulses with an appropriate frequency chirp to realize a velocity selective excitation through a rapid adiabatic passage. This method allows to address in a single pulse a large number of non zero atomic velocity classes and it produces a nearly unity transfer efficiency. We demonstrate this cooling method using cesium atoms in a far-detuned crossed dipole trap. Three-dimensional cooling of $1 \times 10^{5}$ atoms down to $2 \mu$K is performed in 100 ms. In this preliminary experiment the final atomic density is $1.3\times 10^{12}$ at/cm$^3$ (within a factor of 2) and the phase-space density increase over the uncooled sample is 20. Numerical simulations indicate that temperatures below the single photon recoil temperature should be achievable with this method. |
| first_indexed | 2024-03-07T04:33:55Z |
| format | Book section |
| id | oxford-uuid:cf47eb41-a65c-4027-8883-8378208e239c |
| institution | University of Oxford |
| last_indexed | 2024-03-07T04:33:55Z |
| publishDate | 2011 |
| record_format | dspace |
| spelling | oxford-uuid:cf47eb41-a65c-4027-8883-8378208e239c2022-03-27T07:41:19ZThree Dimensional Raman Cooling using Velocity Selective Rapid Adiabatic PassageBook sectionhttp://purl.org/coar/resource_type/c_3248uuid:cf47eb41-a65c-4027-8883-8378208e239cSymplectic Elements at Oxford2011Kuhn, APerrin, HHänsel, WSalomon, CWe present a new and efficient implementation of Raman cooling of trapped atoms. It uses Raman pulses with an appropriate frequency chirp to realize a velocity selective excitation through a rapid adiabatic passage. This method allows to address in a single pulse a large number of non zero atomic velocity classes and it produces a nearly unity transfer efficiency. We demonstrate this cooling method using cesium atoms in a far-detuned crossed dipole trap. Three-dimensional cooling of $1 \times 10^{5}$ atoms down to $2 \mu$K is performed in 100 ms. In this preliminary experiment the final atomic density is $1.3\times 10^{12}$ at/cm$^3$ (within a factor of 2) and the phase-space density increase over the uncooled sample is 20. Numerical simulations indicate that temperatures below the single photon recoil temperature should be achievable with this method. |
| spellingShingle | Kuhn, A Perrin, H Hänsel, W Salomon, C Three Dimensional Raman Cooling using Velocity Selective Rapid Adiabatic Passage |
| title | Three Dimensional Raman Cooling using Velocity Selective Rapid Adiabatic
Passage |
| title_full | Three Dimensional Raman Cooling using Velocity Selective Rapid Adiabatic
Passage |
| title_fullStr | Three Dimensional Raman Cooling using Velocity Selective Rapid Adiabatic
Passage |
| title_full_unstemmed | Three Dimensional Raman Cooling using Velocity Selective Rapid Adiabatic
Passage |
| title_short | Three Dimensional Raman Cooling using Velocity Selective Rapid Adiabatic
Passage |
| title_sort | three dimensional raman cooling using velocity selective rapid adiabatic passage |
| work_keys_str_mv | AT kuhna threedimensionalramancoolingusingvelocityselectiverapidadiabaticpassage AT perrinh threedimensionalramancoolingusingvelocityselectiverapidadiabaticpassage AT hanselw threedimensionalramancoolingusingvelocityselectiverapidadiabaticpassage AT salomonc threedimensionalramancoolingusingvelocityselectiverapidadiabaticpassage |