and the chromomagnetic trap formation under extreme conditions
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Introduction
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In general, diffusion of the relativized versions of ideas born in condensed matter and solid state physics to the quantum field theory has been proven to be extremely fruitful. It was realised long time ago that a complex of problems associated with investigation of the QCD vacuum structure appeared as particularly suitable object in this respect. This paper is focused on the further development of approach to QCD vacuum as a medium describable in terms of statistical ensemble of domain wall networks. This concept plays important role in description of condensed matter systems with rival order and disorder but has been insufficiently explored in application to QCD vacuum.

The identification of the properties of nonperturbative gauge field configurations relevant to a coherent resolution of confinement, chiral symmetry breaking, $U_{\rm A}(1)$ and strong CP problems is an overall task pursued by most approaches to the QCD vacuum structure.

As a rule, analytical as well as Lattice QCD studies of QCD vacuum structure are focused on localized topological configurations (instantons, monopoles and dyons, vortices) which *via* condensation could be seen as appropriate gauge field configurations responsible for confinement of static color 