A meron or half-instanton is a Euclidean space-time solution of the Yang–Mills field equations. It is a singular non-self-dual solution of topological charge 1/2. The instanton is believed to be composed of two merons.
A meron can be viewed as a tunneling event between two Gribov vacua. In that picture, the meron is an event which starts from vacuum, then a Wu–Yang monopole emerges, which then disappears again to leave the vacuum in another Gribov copy.
See also
- Gauge Fields, Classification and Equations of Motion, Moshe Carmeli, Kh. Huleilil and Elhanan Leibowitz, World Scientific Publishing
References
Allan, Curtis (1977). "A Mechanism for Quark Confinement". Physics Letters. 66B (4): 375–381. arXiv:hep-ph/9809351. doi:10.1016/0370-2693(77)90019-3. /wiki/ArXiv_(identifier) ↩
Actor, Alfred (1979). "Classical solutions of SU(2) Yang-Mills theories". Reviews of Modern Physics. 51 (3): 461–525. Bibcode:1979RvMP...51..461A. doi:10.1103/RevModPhys.51.461. /wiki/Reviews_of_Modern_Physics ↩