Question

How many qubits do you need to simulate fermions?

Answer 1

Answer:

The one-to-one mapping between qubit state and fermion state makes it easy to determine the number of qubits you'll need to simulate a fermionic process. If you're dealing with a system of 40 fermion states, like a molecule with 40 orbitals, you'll need 40 qubits to represent it.