Research output: Contribution to Journal/Magazine › Journal article › peer-review
Article number | P07035 |
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<mark>Journal publication date</mark> | 07/2009 |
<mark>Journal</mark> | Journal of Statistical Mechanics: Theory and Experiment |
Number of pages | 10 |
Pages (from-to) | - |
Publication Status | Published |
<mark>Original language</mark> | English |
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 Wick's theorem, we avoid the form-factor summation customarily used in the literature for treating similar problems.