Perhaps a bit naive question from my side, but I could not find any satisfactory answer elsewhere:
What exactly are the coupling maps in quantum computation and, more particularly, how do those maps translate to
CouplingMap objects in
Intuitively, I do get that it is a way to express a connections between the qubits, but are then those physical connections between the physical qubits or something else? Any explanation here would be welcome.
If it helps in any way, for instance, the figure below is often used to illustrate coupling map for a particular
qiskit hardware setup, which I unfortunately cannot read at this point: