First and second sound in a strongly interacting Fermi gas Export

@article{citeulike:6060275, abstract = {Using a variational approach, we solve the equations of two-fluid hydrodynamics for a uniform and trapped Fermi gas at unitarity. In the uniform case, we find that the first and second sound modes are remarkably similar to those in superfluid helium, a consequence of strong interactions. In the presence of harmonic trapping, first and second sound become degenerate at certain temperatures. At these points, second sound hybridizes with first sound and is strongly coupled with density fluctuations, giving a promising way of observing second sound. We also discuss the possibility of exciting second sound by generating local heat perturbations.}, author = {Taylor, E. and Hu, H. and Liu, X. J. and Pitaevskii, L. P. and Griffin, A. and Stringari, S.}, citeulike-article-id = {6060275}, citeulike-linkout-0 = {http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PLRAAN000080000005053601000001&idtype=cvips&gifs=yes}, citeulike-linkout-1 = {http://link.aps.org/abstract/PRA/v80/e053601}, citeulike-linkout-2 = {http://dx.doi.org/10.1103/PhysRevA.80.053601}, doi = {10.1103/PhysRevA.80.053601}, journal = {Physical Review A (Atomic, Molecular, and Optical Physics)}, keywords = {excitations, fermion, hydrodynamics, superfluid}, number = {5}, pages = {053601+}, posted-at = {2009-11-03 13:42:56}, priority = {2}, publisher = {APS}, title = {First and second sound in a strongly interacting Fermi gas}, url = {http://dx.doi.org/10.1103/PhysRevA.80.053601}, volume = {80}, year = {2009} }

TY - JOUR ID - citeulike:6060275 L3 - citeulike-article-id:6060275 N2 - Using a variational approach, we solve the equations of two-fluid hydrodynamics for a uniform and trapped Fermi gas at unitarity. In the uniform case, we find that the first and second sound modes are remarkably similar to those in superfluid helium, a consequence of strong interactions. In the presence of harmonic trapping, first and second sound become degenerate at certain temperatures. At these points, second sound hybridizes with first sound and is strongly coupled with density fluctuations, giving a promising way of observing second sound. We also discuss the possibility of exciting second sound by generating local heat perturbations. IS - 5 JF - Physical Review A (Atomic, Molecular, and Optical Physics) TI - First and second sound in a strongly interacting Fermi gas PB - APS VL - 80 SP - 053601 KW - excitations KW - fermion KW - hydrodynamics KW - superfluid AU - Taylor, E AU - Hu, H AU - Liu, XJ AU - Pitaevskii, LP AU - Griffin, A AU - Stringari, S PY - 2009/// UR - http://dx.doi.org/10.1103/PhysRevA.80.053601 ER -