The asymptotic distribution of a single eigenvalue gap of a Wigner matrix
The asymptotic distribution of a single eigenvalue gap of a Wigner matrix
复制标题
维格纳矩阵的单个特征值间隙的渐近分布
DOI:
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发表时间:
2012
期刊:
影响因子:
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通讯作者:
T. Tao
中科院分区:
文献类型:
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作者:
T. Tao
We show that the distribution of (a suitable rescaling of) a single eigenvalue gap $$lambda _{i+1}(M_n)-lambda _i(M_n)$$ of a random Wigner matrix ensemble in the bulk is asymptotically given by the Gaudin–Mehta distribution, if the Wigner ensemble obeys a finite moment condition and matches moments with the GUE ensemble to fourth order. This is new even in the GUE case, as prior results establishing the Gaudin–Mehta law required either an averaging in the eigenvalue index parameter $$i$$, or fixing the energy level $$u$$ instead of the eigenvalue index. The extension from the GUE case to the Wigner case is a routine application of the Four Moment Theorem. The main difficulty is to establish the approximate independence of the eigenvalue counting function $$N_{(-infty ,x)}( ilde{M}_n)$$ (where $$ ilde{M}_n$$ is a suitably rescaled version of $$M_n$$) with the event that there is no spectrum in an interval $$[x,x+s]$$, in the case of a GUE matrix. This will be done through some general considerations regarding determinantal processes given by a projection kernel.
影响因子:
3.1
作者:
Erdos, Laszlo;Schlein, Benjamin;Yau, Horng-Tzer
通讯作者:
Yau, Horng-Tzer