Is this #math question about #Hadamard matrices unresolved? Is there a \(k\) such that there is no \( 4k \times 4k)\ matrix \(H)\ with -1 or 1 entries such that \(H H^t=4k Id)\?

A basic introduction to #QIBO with a link to online python notebook plus accompanying slides which I used for a tutorial for understands at #NTU #SG.

The examples include:
- basic #Clifford group generators such as Z, X and #Hadamard,
- Preparing a #Bellstate with a #CNOT
- #swaptest, sampling and histograms

https://youtube.com/playlist?list=PLHcR1d_bQV8wnexJ6oAnqddzRdf40YhRc

I'm linking the playlist, suggestions, comments and requests warmly welcome!