Critical velocity in the BEC-BCS crossover
We map out the critical velocity in the crossover from Bose-Einstein condensation to Bardeen-Cooper-Schrieffer superfluidity with ultracold ^{6}Li gases. A small attractive potential is dragged along lines of constant column density. The rate of the induced heating increases steeply above a critical...
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| Veröffentlicht in: | Physical review letters 2015-03, Vol.114 (9), p.095301-095301, Article 095301 |
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| container_title | Physical review letters |
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| creator | Weimer, Wolf Morgener, Kai Singh, Vijay Pal Siegl, Jonas Hueck, Klaus Luick, Niclas Mathey, Ludwig Moritz, Henning |
| description | We map out the critical velocity in the crossover from Bose-Einstein condensation to Bardeen-Cooper-Schrieffer superfluidity with ultracold ^{6}Li gases. A small attractive potential is dragged along lines of constant column density. The rate of the induced heating increases steeply above a critical velocity v_{c}. In the same samples, we measure the speed of sound v_{s} by exciting density waves and compare the results to the measured values of v_{c}. We perform numerical simulations in the Bose-Einstein condensation regime and find very good agreement, validating the approach. In the strongly correlated regime our measurements of v_{c} provide a testing ground for theoretical approaches. |
| doi_str_mv | 10.1103/PhysRevLett.114.095301 |
| format | Article |
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In the strongly correlated regime our measurements of v_{c} provide a testing ground for theoretical approaches.</description><subject>Computer simulation</subject><subject>Condensing</subject><subject>Constants</subject><subject>Critical velocity</subject><subject>Crossovers</subject><subject>Density</subject><subject>Grounds</subject><subject>Heating</subject><issn>0031-9007</issn><issn>1079-7114</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><recordid>eNqFkNtKw0AQhhdRbK2-QsmlCKkz2ezp0oZ6gILi4XrZbCc0kjY1mwb69kZbxTuvBn7-A_MxNkaYIAK_flruwjN1c2rbXkgnYAQHPGJDBGVi1UvHbAjAMTYAasDOQngHAEykPmWDRCjDdcKH7Cpryrb0roo6qmpftruoXEftkqLpLIun2UvkmzqEuqPmnJ0Urgp0cbgj9nY7e83u4_nj3UN2M499moo2zp1OciWFXviCiwQL7ZAKylNjEKVPFHGnjdFOGaVkATo1UhCoVGDCC018xC73vZum_thSaO2qDJ6qyq2p3gaLSkvUILT83yql6OtR8d4q99bvfxoq7KYpV67ZWQT7hdT-QdoLqd0j7YPjw8Y2X9HiN_bDkH8CFk5yCw</recordid><startdate>20150306</startdate><enddate>20150306</enddate><creator>Weimer, Wolf</creator><creator>Morgener, Kai</creator><creator>Singh, Vijay Pal</creator><creator>Siegl, Jonas</creator><creator>Hueck, Klaus</creator><creator>Luick, Niclas</creator><creator>Mathey, Ludwig</creator><creator>Moritz, Henning</creator><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope><scope>7U5</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope></search><sort><creationdate>20150306</creationdate><title>Critical velocity in the BEC-BCS crossover</title><author>Weimer, Wolf ; Morgener, Kai ; Singh, Vijay Pal ; Siegl, Jonas ; Hueck, Klaus ; Luick, Niclas ; Mathey, Ludwig ; Moritz, Henning</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c445t-ba82b7658dcf3521f8a1efeb499116c27e3a8998a79776f084965e0745123f8e3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2015</creationdate><topic>Computer simulation</topic><topic>Condensing</topic><topic>Constants</topic><topic>Critical velocity</topic><topic>Crossovers</topic><topic>Density</topic><topic>Grounds</topic><topic>Heating</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Weimer, Wolf</creatorcontrib><creatorcontrib>Morgener, Kai</creatorcontrib><creatorcontrib>Singh, Vijay Pal</creatorcontrib><creatorcontrib>Siegl, Jonas</creatorcontrib><creatorcontrib>Hueck, Klaus</creatorcontrib><creatorcontrib>Luick, Niclas</creatorcontrib><creatorcontrib>Mathey, Ludwig</creatorcontrib><creatorcontrib>Moritz, Henning</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Physical review letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Weimer, Wolf</au><au>Morgener, Kai</au><au>Singh, Vijay Pal</au><au>Siegl, Jonas</au><au>Hueck, Klaus</au><au>Luick, Niclas</au><au>Mathey, Ludwig</au><au>Moritz, Henning</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Critical velocity in the BEC-BCS crossover</atitle><jtitle>Physical review letters</jtitle><addtitle>Phys Rev Lett</addtitle><date>2015-03-06</date><risdate>2015</risdate><volume>114</volume><issue>9</issue><spage>095301</spage><epage>095301</epage><pages>095301-095301</pages><artnum>095301</artnum><issn>0031-9007</issn><eissn>1079-7114</eissn><abstract>We map out the critical velocity in the crossover from Bose-Einstein condensation to Bardeen-Cooper-Schrieffer superfluidity with ultracold ^{6}Li gases. 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| language | eng |
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| source | American Physical Society Journals |
| subjects | Computer simulation Condensing Constants Critical velocity Crossovers Density Grounds Heating |
| title | Critical velocity in the BEC-BCS crossover |
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