Report
Superdiffusive nonequilibrium motion of an impurity in a Fermi sea
| العنوان: | Superdiffusive nonequilibrium motion of an impurity in a Fermi sea |
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| المؤلفون: | Kim, Hyungwon, Huse, David A. |
| المصدر: | Phys. Rev. A 85, 043603 (2012) |
| سنة النشر: | 2012 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Quantum Gases, Condensed Matter - Strongly Correlated Electrons |
| الوصف: | We treat the nonequilibrium motion of a single impurity atom in a low-temperature single-species Fermi sea, interacting via a contact interaction. In the nonequilibrium regime, the impurity does a superdiffusive geometric random walk where the typical distance traveled grows with time as $\sim t^{d/(d+1)}$ for the $d$-dimensional system with $d\geq 2$. For nonzero temperature $T$, this crosses over to diffusive motion at long times with diffusivity $D\sim T^{-(d-1)/2}$. These results apply also to a nonzero concentration of impurity atoms as long as they remain dilute and nondegenerate. Comment: 5 pages, 1 figure, to appear in Phys. Rev. A |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevA.85.043603 |
| URL الوصول: | http://arxiv.org/abs/1201.1055 |
| رقم الانضمام: | edsarx.1201.1055 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevA.85.043603 |
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