In the realm of quantum physics and quantum AI the dimensionless number indicates how a real laser beam deviates from an ideal beam.
My new books on Amazon
Distributed Artificial Intelligence for Classical and Quantum Computers by Zahra M.M.A. Sadiq
Knowledge Engineering. Artificial Intelligence and Legal Logic by Zahra M.M.A. Sadiq
Computer Music. Electronica, Algorithms, Artificial Intelligence by Zahra M.M.A. Sadiq
The Gifted Individual and the Right to Education by Zahra M.M.A. Sadiq