Pauli blocking of light scattering in degenerate fermions
Pauli blocking of spontaneous emission is responsible for the stability of atoms. Electrons cannot decay to lower-lying internal states that are already occupied. Pauli blocking also occurs when free atoms scatter light elastically (Rayleigh scattering) and the final external momentum states are alr...
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| Veröffentlicht in: | Science (American Association for the Advancement of Science) 2021-11, Vol.374 (6570), p.976-979 |
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| creator | Margalit, Yair Lu, Yu-Kun Top, Furkan Çağrı Ketterle, Wolfgang |
| description | Pauli blocking of spontaneous emission is responsible for the stability of atoms. Electrons cannot decay to lower-lying internal states that are already occupied. Pauli blocking also occurs when free atoms scatter light elastically (Rayleigh scattering) and the final external momentum states are already populated. This was predicted more than 30 years ago but is challenging to realize experimentally. Here, we report on Pauli blocking of light scattering in a dense quantum-degenerate Fermi gas of ultracold lithium atoms. When the Fermi momentum is larger than the photon recoil, most final momentum states are within the Fermi surface. At low temperature, we find that light scattered even at large angles is suppressed by 37% compared with higher temperatures, where atoms scatter at the single-atom Rayleigh scattering rate. |
| doi_str_mv | 10.1126/science.abi6153 |
| format | Article |
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Electrons cannot decay to lower-lying internal states that are already occupied. Pauli blocking also occurs when free atoms scatter light elastically (Rayleigh scattering) and the final external momentum states are already populated. This was predicted more than 30 years ago but is challenging to realize experimentally. Here, we report on Pauli blocking of light scattering in a dense quantum-degenerate Fermi gas of ultracold lithium atoms. When the Fermi momentum is larger than the photon recoil, most final momentum states are within the Fermi surface. At low temperature, we find that light scattered even at large angles is suppressed by 37% compared with higher temperatures, where atoms scatter at the single-atom Rayleigh scattering rate.</description><identifier>ISSN: 0036-8075</identifier><identifier>EISSN: 1095-9203</identifier><identifier>DOI: 10.1126/science.abi6153</identifier><identifier>PMID: 34793214</identifier><language>eng</language><publisher>United States: The American Association for the Advancement of Science</publisher><subject>Atoms & subatomic particles ; Cold gas ; Fermi gases ; Fermi surfaces ; Fermions ; High temperature ; Light ; Light scattering ; Lithium ; Low temperature ; Momentum ; Photons ; Rayleigh scattering ; Scattering ; Spontaneous emission</subject><ispartof>Science (American Association for the Advancement of Science), 2021-11, Vol.374 (6570), p.976-979</ispartof><rights>Copyright © 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. 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At low temperature, we find that light scattered even at large angles is suppressed by 37% compared with higher temperatures, where atoms scatter at the single-atom Rayleigh scattering rate.</description><subject>Atoms & subatomic particles</subject><subject>Cold gas</subject><subject>Fermi gases</subject><subject>Fermi surfaces</subject><subject>Fermions</subject><subject>High temperature</subject><subject>Light</subject><subject>Light scattering</subject><subject>Lithium</subject><subject>Low temperature</subject><subject>Momentum</subject><subject>Photons</subject><subject>Rayleigh scattering</subject><subject>Scattering</subject><subject>Spontaneous emission</subject><issn>0036-8075</issn><issn>1095-9203</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><recordid>eNpdkDtPwzAURi0EoqUws6FILCxp_Uj8GBHiJVWCAWbLdm6KSxIXOxn496RqYGC60nfP_XR1ELokeEkI5avkPHQOlsZ6Tkp2hOYEqzJXFLNjNMeY8VxiUc7QWUpbjMedYqdoxgqhGCXFHKlXMzQ-s01wn77bZKHOGr_56LPkTN9D3Ge-yyrYQAfR9JDVEFsfunSOTmrTJLiY5gK9P9y_3T3l65fH57vbde6YIn2uoFLS1FwagovSAFd2HyhOiSBOUVE46oS0JeYSuLGCUIBKOgfYkkJQtkA3h95dDF8DpF63PjloGtNBGJKmpVJEMsHZiF7_Q7dhiN34naacSSxxQeVIrQ6UiyGlCLXeRd-a-K0J1nurerKqJ6vjxdXUO9gWqj_-VyP7AazLc_g</recordid><startdate>20211119</startdate><enddate>20211119</enddate><creator>Margalit, Yair</creator><creator>Lu, Yu-Kun</creator><creator>Top, Furkan Çağrı</creator><creator>Ketterle, Wolfgang</creator><general>The American Association for the Advancement of Science</general><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QF</scope><scope>7QG</scope><scope>7QL</scope><scope>7QP</scope><scope>7QQ</scope><scope>7QR</scope><scope>7SC</scope><scope>7SE</scope><scope>7SN</scope><scope>7SP</scope><scope>7SR</scope><scope>7SS</scope><scope>7T7</scope><scope>7TA</scope><scope>7TB</scope><scope>7TK</scope><scope>7TM</scope><scope>7U5</scope><scope>7U9</scope><scope>8BQ</scope><scope>8FD</scope><scope>C1K</scope><scope>F28</scope><scope>FR3</scope><scope>H8D</scope><scope>H8G</scope><scope>H94</scope><scope>JG9</scope><scope>JQ2</scope><scope>K9.</scope><scope>KR7</scope><scope>L7M</scope><scope>L~C</scope><scope>L~D</scope><scope>M7N</scope><scope>P64</scope><scope>RC3</scope><scope>7X8</scope><orcidid>https://orcid.org/0000-0002-9180-3700</orcidid><orcidid>https://orcid.org/0000-0003-2564-4630</orcidid><orcidid>https://orcid.org/0000-0002-9528-3044</orcidid><orcidid>https://orcid.org/0000-0003-4840-0487</orcidid></search><sort><creationdate>20211119</creationdate><title>Pauli blocking of light scattering in degenerate fermions</title><author>Margalit, Yair ; 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| ispartof | Science (American Association for the Advancement of Science), 2021-11, Vol.374 (6570), p.976-979 |
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| source | American Association for the Advancement of Science |
| subjects | Atoms & subatomic particles Cold gas Fermi gases Fermi surfaces Fermions High temperature Light Light scattering Lithium Low temperature Momentum Photons Rayleigh scattering Scattering Spontaneous emission |
| title | Pauli blocking of light scattering in degenerate fermions |
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