TY - JOUR
T1 - Self-dual gravity as a large-N limit of the 2D non-linear sigma model
AU - Park, Q. Han
PY - 1990/4/5
Y1 - 1990/4/5
N2 - The 4D self-dual gravity is shown to be equivalent to a large-N limit of the 2D non-linear sigma model with Wess-Zumino terms only. Infinite dimensional symmetries of the self-dual Einstein equations are derived and shown to form a closed algebra which includes W∞-a large-N limit of Zamolodchikov's WN algebra. These are interpreted in terms of Penrose's twistor theory.
AB - The 4D self-dual gravity is shown to be equivalent to a large-N limit of the 2D non-linear sigma model with Wess-Zumino terms only. Infinite dimensional symmetries of the self-dual Einstein equations are derived and shown to form a closed algebra which includes W∞-a large-N limit of Zamolodchikov's WN algebra. These are interpreted in terms of Penrose's twistor theory.
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U2 - 10.1016/0370-2693(90)91737-V
DO - 10.1016/0370-2693(90)91737-V
M3 - Article
AN - SCOPUS:0001251873
VL - 238
SP - 287
EP - 290
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
SN - 0370-2693
IS - 2-4
ER -