Thanks. The other issue with the links is that the braces keep getting cut off by sites (as happened for your link, need to include that last } for it to work)

Thanks. The other issue with the links is that the braces keep getting cut off by sites (as happened for your link, need to include that last } for it to work). But having the URL be the save mechanism is just so darn appealing to me. I generally work around each qubit in an EPR pair appearing to be maximally mixed by conditioning the displays. Add a control to the other wire in the same column as the display, and you'll see the conditional state. Also there's the 2-qubit density matrix display.