Spin Gradient Demagnetization Cooling of Ultracold Atoms
We demonstrate a new cooling method in which a time-varying magnetic field gradient is applied to an ultracold spin mixture. This enables preparation of isolated spin distributions at positive and negative effective spin temperatures of ±50 pK. The spin system can also be used to cool other degree...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
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American Physical Society
2011
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| Online Access: | http://hdl.handle.net/1721.1/67077 https://orcid.org/0000-0001-5697-1496 https://orcid.org/0000-0002-9528-3044 |
| _version_ | 1811081442926526464 |
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| author | Medley, Patrick M. Weld, David M. Miyake, Hirokazu Pritchard, David E. Ketterle, Wolfgang |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Medley, Patrick M. Weld, David M. Miyake, Hirokazu Pritchard, David E. Ketterle, Wolfgang |
| author_sort | Medley, Patrick M. |
| collection | MIT |
| description | We demonstrate a new cooling method in which a time-varying magnetic field gradient is applied to an ultracold spin mixture. This enables preparation of isolated spin distributions at positive and negative effective spin temperatures of ±50 pK. The spin system can also be used to cool other degrees of freedom, and we have used this coupling to cool an apparently equilibrated Mott insulator of rubidium atoms to 350 pK. These are the lowest temperatures ever measured in any system. The entropy of the spin mixture is in the regime where magnetic ordering is expected. |
| first_indexed | 2024-09-23T11:46:45Z |
| format | Article |
| id | mit-1721.1/67077 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T11:46:45Z |
| publishDate | 2011 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/670772022-10-01T05:57:37Z Spin Gradient Demagnetization Cooling of Ultracold Atoms Medley, Patrick M. Weld, David M. Miyake, Hirokazu Pritchard, David E. Ketterle, Wolfgang Massachusetts Institute of Technology. Department of Physics MIT-Harvard Center for Ultracold Atoms Ketterle, Wolfgang Medley, Patrick M. Weld, David M. Miyake, Hirokazu Pritchard, David E. Ketterle, Wolfgang We demonstrate a new cooling method in which a time-varying magnetic field gradient is applied to an ultracold spin mixture. This enables preparation of isolated spin distributions at positive and negative effective spin temperatures of ±50 pK. The spin system can also be used to cool other degrees of freedom, and we have used this coupling to cool an apparently equilibrated Mott insulator of rubidium atoms to 350 pK. These are the lowest temperatures ever measured in any system. The entropy of the spin mixture is in the regime where magnetic ordering is expected. 2011-11-18T19:54:01Z 2011-11-18T19:54:01Z 2011-05 2011-03 Article http://purl.org/eprint/type/JournalArticle 0031-9007 http://hdl.handle.net/1721.1/67077 Medley, Patrick et al. “Spin Gradient Demagnetization Cooling of Ultracold Atoms.” Physical Review Letters 106 (2011): n. pag. Web. 18 Nov. 2011. © 2011 American Physical Society https://orcid.org/0000-0001-5697-1496 https://orcid.org/0000-0002-9528-3044 en_US http://dx.doi.org/10.1103/PhysRevLett.106.195301 Physical Review Letters Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Physical Society APS |
| spellingShingle | Medley, Patrick M. Weld, David M. Miyake, Hirokazu Pritchard, David E. Ketterle, Wolfgang Spin Gradient Demagnetization Cooling of Ultracold Atoms |
| title | Spin Gradient Demagnetization Cooling of Ultracold Atoms |
| title_full | Spin Gradient Demagnetization Cooling of Ultracold Atoms |
| title_fullStr | Spin Gradient Demagnetization Cooling of Ultracold Atoms |
| title_full_unstemmed | Spin Gradient Demagnetization Cooling of Ultracold Atoms |
| title_short | Spin Gradient Demagnetization Cooling of Ultracold Atoms |
| title_sort | spin gradient demagnetization cooling of ultracold atoms |
| url | http://hdl.handle.net/1721.1/67077 https://orcid.org/0000-0001-5697-1496 https://orcid.org/0000-0002-9528-3044 |
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