Lattice energy-moemtnum tensor from the gradient flow

by Prof. Hiroshi Suzuki (Kyushu University)

Monday 2 Nov 2015, 13:30 → 14:30 Asia/Tokyo

Room 433, Main Research Building (RIKEN Wako)

Date: Nov 02 (Mon) Time: 13:30 - Place: Main Research bldg. 433 Speaker: Hiroshi Suzuki (Kyushu University) Title: Lattice energy-moemtnum tensor from the gradient flow Abstract: It is not straightforward to define a Noether current operator in quantum field theory, if one does not use or does not know ultraviolet regularization which preserves the symmetry corresponding to the Noether current. A well-known example is the energy-momentum tensor in lattice gauge theory. The energy-momentum tensor is the Noether current associated with the translational invariance and lattice regularization explicitly breaks the translational invariance. In this talk, I will explain that the gradient flow can be useful to define the energy-momentum tensor in lattice gauge theory. If time allows, I would also like to mention on the application of the gradient flow to the axial vector current and the associated anomaly on the lattice. See more QHP seminars