Spontaneous emission in ultracold spin-polarized anisotropic Fermi seas

dc.contributor.authorO'Sullivan, Brian
dc.contributor.authorBusch, Thomas
dc.contributor.funderIrish Research Council for Science, Engineering and Technology
dc.contributor.funderScience Foundation Ireland
dc.date.accessioned2017-08-25T10:08:52Z
dc.date.available2017-08-25T10:08:52Z
dc.date.issued2009
dc.description.abstractWe examine and explain the spatial emission patterns of ultracold excited fermions in highly anisotropic trapping potentials in the presence of a spin-polarized Fermi sea of ground-state atoms. Due to the Pauli principle, the Fermi sea modifies the available phase space for the recoiling atom. This leads to the well-known modification of the atomic decay rate, but also to a spatial modulation in the probability of the emitted photon's direction. In this work we carry out the first detailed investigation into these spatial anisotropies and show that they are due to an intricate interplay between Fermi energies and degeneracy values of specific energy levels. We identify different regimes and show that the emission can be engineered to become highly directional. As the latter is usually only possible in cavity settings, our results describe an alternative idea for a directional photon source.en
dc.description.sponsorshipScience Foundation Ireland (05/IN/I852); Irish Research Council for Science, Engineering and Technology (Embark Initiative (RS/2006/172)en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.articleid33602
dc.identifier.citationO’Sullivan, B. and Busch, T. (2009) 'Spontaneous emission in ultracold spin-polarized anisotropic Fermi seas', Physical Review A, 79(3), 033602 (7pp). doi: 10.1103/PhysRevA.79.033602en
dc.identifier.doi10.1103/PhysRevA.79.033602
dc.identifier.issn1050-2947
dc.identifier.issued3
dc.identifier.journaltitlePhysical Review Aen
dc.identifier.urihttps://hdl.handle.net/10468/4538
dc.identifier.volume79
dc.language.isoenen
dc.publisherAmerican Physical Societyen
dc.relation.urihttps://journals.aps.org/pra/abstract/10.1103/PhysRevA.79.033602
dc.rights© 2009, American Physical Societyen
dc.subjectGasen
dc.subjectAtomsen
dc.titleSpontaneous emission in ultracold spin-polarized anisotropic Fermi seasen
dc.typeArticle (peer-reviewed)en
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