I'd echo what the others have already said. In addition, you could try the following:
- If using a crate then I think it would be ok for an hour or so to leave the door closed if they are comfortable sleeping in it already. You can cover it with a blanket if that helps stop any crying. I wouldn't leave an 11 week old pup locked in a crate for more than that if you were out myself.
- You could invest in one of those puppy play pens, or if you have a room with a tiled or hard floor that you could pen off then I'd recommend doing that. In our case when I first returned to work on a part-time basis we kept Merlin behind a babygate in the kitchen with his crate, toys, etc. As he got older we eventually let him also have the lounge.
I think it's key that you control what they have access to when you aren't around so that they don't get into bad habits when you aren't there to redirect the behaviour.
- If you haven't already, immediately start building up time away from your pup so they get used to you going and coming back. Start with as little as 10 seconds out of sight, build up to longer, then go back to basics on time but put your coat on as if going out, head out front door, wait 10 seconds, then go back in etc. Rinse and repeat multiple times daily until your pup gets used to you leaving without crying about it.
As others said, you can support this by providing a frozen kong, frozen teatowel, etc. to help keep them busy.
I can't stress enough how important it is to have a dog walker or someone coming in regularly when you are not there with a young pup. If this doesn't happen you are likely to find that toilet training takes longer, etc. I hope you find someone suitable
For your own peace of mind you could also setup a webcam as cctv focused on the area that you'll limit your pup to; we found this very helpful when training Merlin to be by himself and still use it now to check in on him