Has polyphasic sleeping been demonstrated to work? what is the best form of it?

Not sure: There appears to be controversy for and against this. Although this may be helpful for those with "graveyard shifts". It appears that many people who did this went back to biphasic or monophasic sleep eventually. It may or may not fit your lifestyle as well? I think you could safely try it if your schedule permits. Here is a link to look at and try http://www.Wikihow.Com/adopt-a-polyphasic-sleep.