The $SU(N)$ QCD in a particular quadratic gauge is shown to contain two phases namely, the deconfined phase and the confined phase. A suitable field dependent parameter in the finite field dependent BRST (FFBRST) transformation interrelates the effective theories in two different gauges. In this paper, we propose a novel application and extension of the FFBRST technique that transforms the effective action in the deconfined phase to that in the confined phase within the quadratic gauge only. The proposed passage becomes interesting as it carries a unique field theoretic meaning and due to the fact that the technique changes the BRST invariant phase to BRST non invariant phase in an unconventional way unlike usual connections where both the theories, before and after application of FFBRST, are BRST invariant. We thus find a new process in field redefinition that executes deconfinement to confinement phase transition other than ghost condensation mechanism.

这 $秒你(N)$特定二次规中的 QCD 显示包含两个阶段，即去约束相和约束相。有限场相关 BRST (FFBRST) 变换中合适的场相关参数将两个不同规范中的有效理论相互关联。在本文中，我们提出了 FFBRST 技术的一种新应用和扩展，该技术将去限制阶段的有效作用转换为仅二次规范内的限制阶段的有效作用。提议的段落变得有趣，因为它具有独特的场论意义，并且由于该技术以非常规的方式将 BRST 不变相更改为 BRST 非不变相，这与通常的连接不同，其中两种理论在应用 FFBRST 之前和之后，是 BRST 不变的。