Expectation values of local operators in phi^4 theory with a magnetic line defect are computed non-perturbatively using relativistic continuous matrix product states, by rotating Euclidean time so the defect becomes an extended operator in the bulk vacuum.
Kondo,Theory of Dilute Magnetic Alloys, edited by F
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A relativistic continuous matrix product state study of field theories with defects
Expectation values of local operators in phi^4 theory with a magnetic line defect are computed non-perturbatively using relativistic continuous matrix product states, by rotating Euclidean time so the defect becomes an extended operator in the bulk vacuum.