“…where P ( r) ≡ 1 2 T r Na τ =1 U a ( r, τ ), is the Polyakov loop closed in the N a direction and ✷ µν = 1 2 T r(U P ) is the plaquette variable with the orientation (µ, ν), which has 6 different values, (µ, ν)=(2, 3), (1,3), (1,2), (1,4), (2,4), (3,4).…”