I am new to the quantum world and it's computing. But it accidentally hit in my mind that DWave built a quantum computer with 2000 qubits which can be use to simulate the whole observable universe or to simulate whole brain for finding what out about consciousness. And the future plan of Dwave is to build a quantum computer with 5000 qubits, which is a lot higher.
Recently Google made a quantum computer and claims to have achieved quantum supremacy.
But what is the problem with running the experiment, which can solve the centuries-old problem using quantum computer with 2000 qubits?
Any help would be appreciated.