We present an argument to support the existence of dissipativemodes in relativistic field theories. For an O(N) ϕ4 theory in spatial dimension 1 ≤ d ≤ 3, the two-point function of ϕ is shown to develop a pole of the form p0 ∼ i −1(p2 + m2) at small energy p0 and momentum p, with a nonzero finite coefficient or relaxation constant, ,when evaluated in the two-…

Tahun Terbit

2003