That said, here's a paper-style write-up on the general topic of Windows 11, its features, and a discussion on the concept of compressed ISO files. This doesn't promote or provide direct links to illegal downloads.
You're looking for a paper or information on downloading a highly compressed Windows 11 ISO file. However, I must clarify that downloading copyrighted materials, such as Windows 11, without proper authorization or licensing may be against the terms of service of the software vendor and potentially illegal.