Topological px+ipy superfluid phase of fermionic polar molecules
We discuss the topological px+ipy superfluid phase in a 2D gas of single-component fermionic polar molecules dressed by a circularly polarized microwave field. This phase emerges because the molecules may interact with each other via a potential Vo(r) that has an attractive dipole-dipole 1/r^3 tail,...
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2011
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ftunivamstpubl:oai:dare.uva.nl:openaire_cris_publications/65fdcdc3-4158-423d-8f34-722f65211cbd 2024-09-30T14:37:45+00:00 Topological px+ipy superfluid phase of fermionic polar molecules Levinsen, J. Cooper, N.R. Shlyapnikov, G.V. 2011 https://dare.uva.nl/personal/pure/en/publications/topological-pxipy-superfluid-phase-of-fermionic-polar-molecules(65fdcdc3-4158-423d-8f34-722f65211cbd).html https://doi.org/10.1103/PhysRevA.84.013603 eng eng https://dare.uva.nl/personal/pure/en/publications/topological-pxipy-superfluid-phase-of-fermionic-polar-molecules(65fdcdc3-4158-423d-8f34-722f65211cbd).html info:eu-repo/semantics/closedAccess Levinsen , J , Cooper , N R & Shlyapnikov , G V 2011 , ' Topological px+ipy superfluid phase of fermionic polar molecules ' , Physical Review A , vol. 84 , no. 1 . https://doi.org/10.1103/PhysRevA.84.013603 article 2011 ftunivamstpubl https://doi.org/10.1103/PhysRevA.84.013603 2024-09-12T16:38:26Z We discuss the topological px+ipy superfluid phase in a 2D gas of single-component fermionic polar molecules dressed by a circularly polarized microwave field. This phase emerges because the molecules may interact with each other via a potential Vo(r) that has an attractive dipole-dipole 1/r^3 tail, which provides p-wave superfluid pairing at fairly high temperatures. We calculate the amplitude of elastic p-wave scattering in the potential Vo(r) taking into account both the anomalous scattering due to the dipole-dipole tail and the short-range contribution. This amplitude is then used for the analytical and numerical solution of the renormalized BCS gap equation which includes the second order Gor'kov-Melik-Barkhudarov corrections and the correction related to the effective mass of the quasiparticles. We find that the critical temperature Tc can be varied within a few orders of magnitude by modifying the short-range part of the potential Vo(r). The decay of the system via collisional relaxation of molecules to dressed states with lower energies is rather slow due to the necessity of a large momentum transfer. The presence of a constant transverse electric field reduces the inelastic rate, and the lifetime of the system can be of the order of seconds even at 2D densities ~10^9 cm^-2}. This leads to Tc of up to a few tens of nanokelvins and makes it realistic to obtain the topological px+ipy phase in experiments with ultracold polar molecules. Article in Journal/Newspaper IPY Universiteit van Amsterdam: Digital Academic Repository (UvA DARE) Physical Review A 84 1 |
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Open Polar |
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Universiteit van Amsterdam: Digital Academic Repository (UvA DARE) |
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ftunivamstpubl |
language |
English |
description |
We discuss the topological px+ipy superfluid phase in a 2D gas of single-component fermionic polar molecules dressed by a circularly polarized microwave field. This phase emerges because the molecules may interact with each other via a potential Vo(r) that has an attractive dipole-dipole 1/r^3 tail, which provides p-wave superfluid pairing at fairly high temperatures. We calculate the amplitude of elastic p-wave scattering in the potential Vo(r) taking into account both the anomalous scattering due to the dipole-dipole tail and the short-range contribution. This amplitude is then used for the analytical and numerical solution of the renormalized BCS gap equation which includes the second order Gor'kov-Melik-Barkhudarov corrections and the correction related to the effective mass of the quasiparticles. We find that the critical temperature Tc can be varied within a few orders of magnitude by modifying the short-range part of the potential Vo(r). The decay of the system via collisional relaxation of molecules to dressed states with lower energies is rather slow due to the necessity of a large momentum transfer. The presence of a constant transverse electric field reduces the inelastic rate, and the lifetime of the system can be of the order of seconds even at 2D densities ~10^9 cm^-2}. This leads to Tc of up to a few tens of nanokelvins and makes it realistic to obtain the topological px+ipy phase in experiments with ultracold polar molecules. |
format |
Article in Journal/Newspaper |
author |
Levinsen, J. Cooper, N.R. Shlyapnikov, G.V. |
spellingShingle |
Levinsen, J. Cooper, N.R. Shlyapnikov, G.V. Topological px+ipy superfluid phase of fermionic polar molecules |
author_facet |
Levinsen, J. Cooper, N.R. Shlyapnikov, G.V. |
author_sort |
Levinsen, J. |
title |
Topological px+ipy superfluid phase of fermionic polar molecules |
title_short |
Topological px+ipy superfluid phase of fermionic polar molecules |
title_full |
Topological px+ipy superfluid phase of fermionic polar molecules |
title_fullStr |
Topological px+ipy superfluid phase of fermionic polar molecules |
title_full_unstemmed |
Topological px+ipy superfluid phase of fermionic polar molecules |
title_sort |
topological px+ipy superfluid phase of fermionic polar molecules |
publishDate |
2011 |
url |
https://dare.uva.nl/personal/pure/en/publications/topological-pxipy-superfluid-phase-of-fermionic-polar-molecules(65fdcdc3-4158-423d-8f34-722f65211cbd).html https://doi.org/10.1103/PhysRevA.84.013603 |
genre |
IPY |
genre_facet |
IPY |
op_source |
Levinsen , J , Cooper , N R & Shlyapnikov , G V 2011 , ' Topological px+ipy superfluid phase of fermionic polar molecules ' , Physical Review A , vol. 84 , no. 1 . https://doi.org/10.1103/PhysRevA.84.013603 |
op_relation |
https://dare.uva.nl/personal/pure/en/publications/topological-pxipy-superfluid-phase-of-fermionic-polar-molecules(65fdcdc3-4158-423d-8f34-722f65211cbd).html |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1103/PhysRevA.84.013603 |
container_title |
Physical Review A |
container_volume |
84 |
container_issue |
1 |
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1811640524265750528 |