euclidean quantum field theory

euclidean quantum field theory

[yü′klid·ē·ən ¦kwänt·əm ′fēld ‚thē·ə·rē]
(quantum mechanics)
A relativistic quantum field theory in which time is replaced by a purely formal imaginary time, resulting in replacement of Lorentz covariance by euclidean group covariance.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.