Transition Probabilities and Dynamic Structure Function in the ASEP Conditioned on Strong Flux

Transition Probabilities and Dynamic Structure Function in the ASEP Conditioned on Strong Flux
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强通量条件下ASEP中的跃迁概率和动态结构函数

DOI:
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发表时间:
2010
期刊:
影响因子:
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通讯作者:
G. Schütz
G. Schütz
中科院分区:
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文献类型:
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作者:
V. Popkov;G. Schütz

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考虑环上的非对称简单排斥过程(ASEP),该过程被限制为产生一个极大的通量或一个极端的活动。利用量子自由费米子技术,我们得到了含时的条件跃迁几率和在这种条件动力学下的精确动力学结构函数。在热力学极限下,我们得到了显式的标度形式。这给出了一个直接的证明,在极端电流制度的动力学指数是z=1,而不是KPZ指数z=3/2,其特征的ASEP在典型的电流制度。我们的一些结果扩展到部分不对称简单排斥过程的活动,包括对称的情况。
We consider the asymmetric simple exclusion processes (ASEP) on a ring constrained to produce an atypically large flux, or an extreme activity. Using quantum free fermion techniques we find the time-dependent conditional transition probabilities and the exact dynamical structure function under such conditioned dynamics. In the thermodynamic limit we obtain the explicit scaling form. This gives a direct proof that the dynamical exponent in the extreme current regime is z=1 rather than the KPZ exponent z=3/2 which characterizes the ASEP in the regime of typical currents. Some of our results extend to the activity in the partially asymmetric simple exclusion process, including the symmetric case.