fixes to Quantikz plotting

QuantumSavory · Jun 20, 2023 · 9917f6a · 9917f6a
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -5,7 +5,11 @@
 
 # News
 
-## v0.8.5 - dev
+## v0.8.6 - 2023-06-20
+
+- Fixes to Quantikz circuit plotting of empty circuits and `PauliOperator`
+
+## v0.8.5 - 2023-06-13
 
 - Internal helper method `mul_right!` is now available for right Pauli inplace multiplication.
 - Implemented `sMRZ` to reset single qubits to the |0⟩ (and respectively `sMRX` and `sMRY`).

diff --git a/Project.toml b/Project.toml
@@ -1,7 +1,7 @@
 name = "QuantumClifford"
 uuid = "0525e862-1e90-11e9-3e4d-1b39d7109de1"
 authors = ["Stefan Krastanov <[email protected]>"]
-version = "0.8.5"
+version = "0.8.6"
 
 [deps]
 Combinatorics = "861a8166-3701-5b0c-9a16-15d98fcdc6aa"

diff --git a/ext/QuantumCliffordQuantikzExt/QuantumCliffordQuantikzExt.jl b/ext/QuantumCliffordQuantikzExt/QuantumCliffordQuantikzExt.jl
@@ -20,6 +20,7 @@ function Quantikz.QuantikzOp(op::SparseGate)
     end
 end
 Quantikz.QuantikzOp(op::AbstractOperation) = Quantikz.MultiControlU(affectedqubits(op))
+Quantikz.QuantikzOp(op::PauliOperator) = Quantikz.MultiControlU("\\begin{array}{c}$(lstring(op))\\end{array}", affectedqubits(op))
 Quantikz.QuantikzOp(op::sId1) = Quantikz.Id(affectedqubits(op)...)
 function Quantikz.QuantikzOp(op::AbstractSingleQubitOperator)
     T = typeof(op)
@@ -83,8 +84,13 @@ function lstring(stab::Stabilizer)
     v = join(("\\mathtt{$(replace(string(p),"_"=>"I"))}" for p in stab),"\\\\")
 end
 
-Base.show(io::IO, mime::MIME"image/png", circuit::AbstractVector{<:AbstractOperation}; scale=1, kw...) =
-    show(io, mime, [Quantikz.QuantikzOp(c) for c in circuit]; scale=scale, kw...)
+function Base.show(io::IO, mime::MIME"image/png", circuit::AbstractVector{<:AbstractOperation}; scale=1, kw...)
+    if length(circuit)==0
+        show(io, mime, [Quantikz.Id(1)]; scale=scale, kw...)
+    else
+        show(io, mime, [Quantikz.QuantikzOp(c) for c in circuit]; scale=scale, kw...)
+    end
+end
 Base.show(io::IO, mime::MIME"image/png", gate::T; scale=1, kw...) where T<:AbstractOperation =
     show(io, mime, Quantikz.QuantikzOp(gate); scale=scale, kw...)
 

diff --git a/src/affectedqubits.jl b/src/affectedqubits.jl
@@ -8,4 +8,5 @@ affectedqubits(b::BellMeasurement) = [m.qubit for m in b.measurements]
 affectedqubits(r::Reset) = r.indices
 affectedqubits(n::NoiseOp) = n.indices
 affectedqubits(g::PauliMeasurement) = 1:length(g.pauli)
+affectedqubits(p::PauliOperator) = 1:length(p)
 affectedqubits(m::AbstractMeasurement) = [m.qubit]