物理学报
物理學報
물이학보
2013年
11期
75-80
,共6页
反常输运%负迁移率%非高斯噪声
反常輸運%負遷移率%非高斯譟聲
반상수운%부천이솔%비고사조성
negative mobility%non-Gaussian noise%anomalous transport
利用随机模拟方法研究了惯性棘轮中非高斯噪声对负迁移率的影响.分别模拟了绝对负迁移率(ANM),非线性迁移率(NNM)和负微分迁移率(NDM)等三种反常输运现象.计算结果表明:1)在不同的参数空间里,非高斯噪声参数q能够增强或者削弱ANM,诱导NNM和NDM;2)当q较大时,反常输运现象转化为正常输运;3)随着q逐渐增大,平均速度-关联时间特性曲线朝着关联时间较小的方向移动并且其峰值逐渐减小.
利用隨機模擬方法研究瞭慣性棘輪中非高斯譟聲對負遷移率的影響.分彆模擬瞭絕對負遷移率(ANM),非線性遷移率(NNM)和負微分遷移率(NDM)等三種反常輸運現象.計算結果錶明:1)在不同的參數空間裏,非高斯譟聲參數q能夠增彊或者削弱ANM,誘導NNM和NDM;2)噹q較大時,反常輸運現象轉化為正常輸運;3)隨著q逐漸增大,平均速度-關聯時間特性麯線朝著關聯時間較小的方嚮移動併且其峰值逐漸減小.
이용수궤모의방법연구료관성극륜중비고사조성대부천이솔적영향.분별모의료절대부천이솔(ANM),비선성천이솔(NNM)화부미분천이솔(NDM)등삼충반상수운현상.계산결과표명:1)재불동적삼수공간리,비고사조성삼수q능구증강혹자삭약ANM,유도NNM화NDM;2)당q교대시,반상수운현상전화위정상수운;3)수착q축점증대,평균속도-관련시간특성곡선조착관련시간교소적방향이동병차기봉치축점감소.
Effects of non-Gaussian noise on negative mobility in an inertial ratchet were investigated by means of stochastic simulation method. The absolute negative mobility (ANM), negative nonlinear mobility (NDM), and negative differential mobility (NNM) were simulated, separately. Results indicate that:(i) non-Gaussian noise can either enhance or diminish the phenomena of ANM, and non-Gaussian noise also can induce NDM and NNM in regions of parameter space. (ii) The average velocity-correlation time characteristics shift towards small value of correlation time. (iii) The absolute value of negative-valued minima decreases as the non-Gaussian noise parameter q increases.
