2007/12/04 by David Vercauteren, Henri Verschelde · 1 citation
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Quantum Chromodynamics and Particle Interactions #hep-th
paper · pdf · doi:10.1016/j.physletb.2008.01.013
published as Phys.Lett.B660:432-438,2008 · 11 pages, 8 figures
arxiv created 2007/12/04 · openalex publication_date 2008/01/17 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In this Letter we apply the formalism of local composite operators as developed by Verschelde et al. in combination with a constant chromomagnetic field as considered in the seventies by Savvidy and others. We find that a nonzero 〈 A μ 2 〉 minimizes the vacuum energy, as in the case with no chromomagnetic field, and that the chromomagnetic field itself is near-to zero. The Nielsen–Olesen instability, caused by the imaginary part in the action, also vanishes. We further investigate the effect of an external chromomagnetic field on the value of 〈 A μ 2 〉 , finding that this condensate is destroyed by sufficiently strong fields. The inverse scenario, where 〈 A μ 2 〉 is considered as external, results in analogous findings: when this condensate is sufficiently large, the induced chromomagnetic field is lowered to a perturbative value slightly below the applied 〈 A μ 2 〉 .