کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9868154 1530682 2005 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Phonon spectrum and damping of a dilute quantum degenerate Bose-Fermi mixture at finite temperature
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک و نجوم (عمومی)
پیش نمایش صفحه اول مقاله
Phonon spectrum and damping of a dilute quantum degenerate Bose-Fermi mixture at finite temperature
چکیده انگلیسی
In this Letter we investigated Bose-Fermi gas mixture at finite temperature by using Green's function method. First for spin-polarized system the temperature effects on the phonon spectrum have been taken into account. Second we consider a dilute mixture of a Bose gas and a two components Fermi gas when both bosons and fermions have undergone superfluid transitions. In this case the interaction between two hyperfine Fermi components is important. In addition we calculate the dispersion of phonon excitations, including correction to the sound velocity and Landau damping. The damping rate varies as T2 in low temperatures limit. There is also damping at absolute zero temperature due to the interaction between bosons and fermions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters A - Volume 340, Issues 1–4, 6 June 2005, Pages 161-169
نویسندگان
, ,