Fig. 7
From: A quantum approximate optimization method for finding Hadamard matrices
Lowest order PEL (Potential Energy Landscape) of (a) 12-order QAOA-Based Williamson Method and (b) 44-order QAOA-Based Turyn Method. The Williamson’s PEL method is relatively more regular than the Turyn’s, indicating that finding the minimum value in the Turyn-based method is more difficult than the Williamson’s.
