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Question

I'm building a quantum circuit using the quantikz package in LaTeX. In my design, I need to indicate that there are more qubits (not drawn explicitly) between two visible lines. I want to use vertical dots \vdots to show this.

However, I'm running into some issues:

1. If I insert & \vdots \\, quantikz automatically draws wires connecting the rows above and below.
2. If I avoid using \qw in that row to suppress the wires, the \vdots ends up aligned to the left, not centered in the column.
3. I've tried workarounds like \push{\vdots}, \hspace, \rlap, or even \multigate{0}{\vdots}, but these either produce misaligned dots or still draw unwanted wires.

What I want:

• Insert \vdots between rows to represent omitted qubits.
• Make sure it is horizontally centered in the column (aligned with gates or wires above and below).
• Ensure that no wire is drawn vertically through the \vdots row.

Is there a reliable or recommended way to achieve this with quantikz?

Thanks!

Answer 1

Use:

\begin{quantikz}[wire types={q,q,q,q,n,q,q,q,q}]

This sets the fifth row to be no wire (n=no wire).

Then on the fifth row, use:

&\vdots&\vdots&\vdots...

as appropriate. You might have to work to get them aligned.