%0 Journal Article %1 Carlson2005Asymmetric %A Carlson, J. %A Reddy, Sanjay %D 2005 %I American Physical Society %J Physical Review Letters %K cold\_atoms, condensed\_matter, fermions, strongly\_interacting %N 6 %P 060401+ %R 10.1103/physrevlett.95.060401 %T Asymmetric Two-Component Fermion Systems in Strong Coupling %U http://dx.doi.org/10.1103/physrevlett.95.060401 %V 95 %X We study the phase structure of a dilute two-component Fermi system with attractive interactions as a function of the coupling and a finite number asymmetry or polarization. In weak coupling, a number asymmetry results in phase separation. A mixed phase containing symmetric superfluid matter and an asymmetric normal phase is favored. For strong coupling we show that the stress on the superfluid phase to accommodate a number asymmetry increases. Near the infinite-scattering length, we calculate the single-particle excitation spectrum and the ground-state energy. A picture of weakly interacting quasiparticles emerges for modest polarizations. In this regime a homogeneous phase with a finite population of quasiparticle states characterized by a gapless spectrum is favored over the phase separated state. These states may be realized in cold atom experiments.

@article{Carlson2005Asymmetric, abstract = {We study the phase structure of a dilute two-component Fermi system with attractive interactions as a function of the coupling and a finite number asymmetry or polarization. In weak coupling, a number asymmetry results in phase separation. A mixed phase containing symmetric superfluid matter and an asymmetric normal phase is favored. For strong coupling we show that the stress on the superfluid phase to accommodate a number asymmetry increases. Near the infinite-scattering length, we calculate the single-particle excitation spectrum and the ground-state energy. A picture of weakly interacting quasiparticles emerges for modest polarizations. In this regime a homogeneous phase with a finite population of quasiparticle states characterized by a gapless spectrum is favored over the phase separated state. These states may be realized in cold atom experiments.}, added-at = {2014-01-09T15:14:33.000+0100}, author = {Carlson, J. and Reddy, Sanjay}, biburl = {https://www.bibsonomy.org/bibtex/259b739059c2c31a7aac0318d0ede4dc1/jaspervh}, citeulike-article-id = {3213553}, citeulike-linkout-0 = {http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PRLTAO000095000006060401000001&idtype=cvips&gifs=yes}, citeulike-linkout-1 = {http://link.aps.org/abstract/PRL/v95/e060401}, citeulike-linkout-2 = {http://dx.doi.org/10.1103/physrevlett.95.060401}, doi = {10.1103/physrevlett.95.060401}, interhash = {f229f08edfe05a93adfb55a5eab19c79}, intrahash = {59b739059c2c31a7aac0318d0ede4dc1}, journal = {Physical Review Letters}, keywords = {cold\_atoms, condensed\_matter, fermions, strongly\_interacting}, month = aug, number = 6, pages = {060401+}, posted-at = {2013-01-04 14:52:01}, priority = {2}, publisher = {American Physical Society}, timestamp = {2014-01-09T15:14:33.000+0100}, title = {Asymmetric Two-Component Fermion Systems in Strong Coupling}, url = {http://dx.doi.org/10.1103/physrevlett.95.060401}, volume = 95, year = 2005 }