Superfluidity and Dimerization in a Multilayered System of Fermionic Polar Molecules
We consider a layered system of fermionic molecules with permanent dipole moments aligned perpendicular to the layers by an external field. The dipole interactions between fermions in adjacent layers are attractive and induce interlayer pairing. Because of the competition for pairing among adjacent...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | en_US |
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American Physical Society
2011
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| Online Access: | http://hdl.handle.net/1721.1/65957 |
| _version_ | 1826194396993814528 |
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| author | Potter, Andrew Cole Berg, Erez Wang, Daw-Wei Halperin, B. I. Demler, Eugene |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Potter, Andrew Cole Berg, Erez Wang, Daw-Wei Halperin, B. I. Demler, Eugene |
| author_sort | Potter, Andrew Cole |
| collection | MIT |
| description | We consider a layered system of fermionic molecules with permanent dipole moments aligned perpendicular to the layers by an external field. The dipole interactions between fermions in adjacent layers are attractive and induce interlayer pairing. Because of the competition for pairing among adjacent layers, the mean-field ground state of the layered system is a dimerized superfluid, with pairing only between every other layer. We construct an effective Ising-XY lattice model that describes the interplay between dimerization and superfluid phase fluctuations. In addition to the dimerized superfluid ground state, and high-temperature normal state, at intermediate temperature, we find an unusual dimerized “pseudogap” state with only short-range phase coherence. We propose light-scattering experiments to detect dimerization. |
| first_indexed | 2024-09-23T09:55:28Z |
| format | Article |
| id | mit-1721.1/65957 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T09:55:28Z |
| publishDate | 2011 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/659572022-09-30T17:43:59Z Superfluidity and Dimerization in a Multilayered System of Fermionic Polar Molecules Potter, Andrew Cole Berg, Erez Wang, Daw-Wei Halperin, B. I. Demler, Eugene Massachusetts Institute of Technology. Department of Physics Potter, Andrew Cole Potter, Andrew Cole We consider a layered system of fermionic molecules with permanent dipole moments aligned perpendicular to the layers by an external field. The dipole interactions between fermions in adjacent layers are attractive and induce interlayer pairing. Because of the competition for pairing among adjacent layers, the mean-field ground state of the layered system is a dimerized superfluid, with pairing only between every other layer. We construct an effective Ising-XY lattice model that describes the interplay between dimerization and superfluid phase fluctuations. In addition to the dimerized superfluid ground state, and high-temperature normal state, at intermediate temperature, we find an unusual dimerized “pseudogap” state with only short-range phase coherence. We propose light-scattering experiments to detect dimerization. National Science Foundation (U.S.) (NSF IGERT Grant No. DGE-0801525) National Science Foundation (U.S.) (Grant No. DMR-0705472) National Science Foundation (U.S.) (Grant No. DMR-0757145) United States. Air Force Office of Scientific Research (Quantum Simulation MURI) United States. Air Force Office of Scientific Research (AFOSR MURI on Ultracold Molecules) United States. Defense Advanced Research Projects Agency (DARPA OLE Program) MIT-Harvard Center for Ultracold Atoms National Science Foundation (U.S.) (NSF Grant No. DMR-09-06475) 2011-09-23T20:32:24Z 2011-09-23T20:32:24Z 2010-11 2010-07 Article http://purl.org/eprint/type/JournalArticle 0031-9007 http://hdl.handle.net/1721.1/65957 Potter, Andrew et al. “Superfluidity and Dimerization in a Multilayered System of Fermionic Polar Molecules.” Physical Review Letters 105 (2010). © 2010 The American Physical Society en_US http://dx.doi.org/10.1103/PhysRevLett.105.220406 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 | Potter, Andrew Cole Berg, Erez Wang, Daw-Wei Halperin, B. I. Demler, Eugene Superfluidity and Dimerization in a Multilayered System of Fermionic Polar Molecules |
| title | Superfluidity and Dimerization in a Multilayered System of Fermionic Polar Molecules |
| title_full | Superfluidity and Dimerization in a Multilayered System of Fermionic Polar Molecules |
| title_fullStr | Superfluidity and Dimerization in a Multilayered System of Fermionic Polar Molecules |
| title_full_unstemmed | Superfluidity and Dimerization in a Multilayered System of Fermionic Polar Molecules |
| title_short | Superfluidity and Dimerization in a Multilayered System of Fermionic Polar Molecules |
| title_sort | superfluidity and dimerization in a multilayered system of fermionic polar molecules |
| url | http://hdl.handle.net/1721.1/65957 |
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