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Time-dependent correlation function of the Jordan-Wigner operator as a Fredholm determinant

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 نشر من قبل Mikhail Zvonarev
 تاريخ النشر 2008
  مجال البحث فيزياء
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We calculate a correlation function of the Jordan-Wigner operator in a class of free-fermion models formulated on an infinite one-dimensional lattice. We represent this function in terms of the determinant of an integrable Fredholm operator, convenient for analytic and numerical investigations. By using Wicks theorem, we avoid the form-factor summation customarily used in literature for treating similar problems.



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