From 67165b939a3cb0660806e8fdfe335022691d6a97 Mon Sep 17 00:00:00 2001
From: Fe-r-oz <feroz.ahmad.email@gmail.com>
Date: Thu, 18 Jul 2024 14:16:00 +0500
Subject: [PATCH] minor cleanup in TODO3(apply)

---
 src/nonclifford.jl | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/nonclifford.jl b/src/nonclifford.jl
index 1df67b58b..7531ae684 100644
--- a/src/nonclifford.jl
+++ b/src/nonclifford.jl
@@ -209,7 +209,9 @@ function apply!(state::GeneralizedStabilizer, gate::AbstractPauliChannel; prune_
             dᵢ′ = dₗ .⊻ dᵢ
             dⱼ′ = dᵣ .⊻ dⱼ
             χ′ = χ * w * (-tone)^c * (im)^(-phaseₗ+phaseᵣ+4)
-            newdict[(dᵢ′,dⱼ′)] = get!(newdict,(dᵢ′,dⱼ′),0)+χ′
+            if abs(χ′) >= prune_threshold
+                newdict[(dᵢ′,dⱼ′)] = get!(newdict,(dᵢ′,dⱼ′),0)+χ′
+            end
         end
     end
     filter!(x -> abs(x[2]) >= prune_threshold, newdict)