Lj. Thomas et Eh. Wichmann, ABOUT MATRIX-ELEMENTS OF SPATIAL TRANSLATIONS IN LOCAL-FIELD THEORIES, letters in mathematical physics, 28(1), 1993, pp. 49-58
Some results of Fredenhagen concerning the asymptotic behavior of matr
ix elements of translation operators in local quantum field theories a
re discussed. An alternative derivation and generalizations are presen
ted.