In Qiskit, I am solving a VRP for 5 nodes and it creates 20 variables for a QUBO. It runs in a 65 qubit machines (any machine below that many fails). Now, in such a typical solvers for optimization (VQE, QAOA etc.) more than 100 circuits are run in a machine. With
max_evals we can run a bunch of these in the IBMQ machines to gain on wait time. I am wondering if there is pros/cons of using 1 circuit at a time or
max_evals set to
max_iter or is there a thumb-rule to select the optimum max_evals? One pro is obviously we can avoid the wait-time in queue. But is there any other cons?
Also, what is the most effective way to run such a QUBO, so that all the jobs cann be submitted at a time to the machine, so that there is no wait time?