期刊論文
| 學年 | 91 |
|---|---|
| 學期 | 1 |
| 出版（發表）日期 | 2002-11-05 |
| 作品名稱 | Nonequilibrium Relaxation in Neutral BCS Superconductors: Ginzburg-Landau Approach with Landau Damping in Real Time |
| 作品名稱（其他語言） | |
| 著者 | S. M. Alamoudi; D. Boyanovsky; S.-Y. Wang |
| 單位 | |
| 出版者 | |
| 著錄名稱、卷期、頁數 | Physical Review B 66(18), 184502 |
| 摘要 | We present a field-theoretical method to obtain consistently the equations of motion for small amplitude fluctuations of the order parameter directly in real time for a homogeneous, neutral BCS superconductor. This method allows to study the nonequilibrium relaxation of the order parameter as an initial value problem. We obtain the Ward identities and the effective actions for small phase the amplitude fluctuations to one-loop order. Focusing on the long wavelength, low-frequency limit near the critical point, we obtain the time-dependent Ginzburg-Landau effective action to one-loop order, which is nonlocal as a consequence of Landau damping. The nonequilibrium relaxation of the phase and amplitude fluctuations is studied directly in real time. The long-wavelength phase fluctuation (Bogoliubov-Anderson-Goldstone mode) is overdamped by Landau damping and the relaxation time scale diverges at the critical point, revealing critical slowing down. |
| 關鍵字 | |
| 語言 | en_US |
| ISSN | 2469-9950 |
| 期刊性質 | 國外 |
| 收錄於 | SCI |
| 產學合作 | |
| 通訊作者 | |
| 審稿制度 | 否 |
| 國別 | USA |
| 公開徵稿 | |
| 出版型式 | ,電子版,紙本 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/122307 ) |