Nonequilibrium Relaxation in Neutral BCS Superconductors: Ginzburg-Landau Approach with Landau Damping in Real Time
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 )