Quantum Computation with Aharonov-Bohm Qubits


We analyze the possibility of employing a mesoscopic/nanoscopic ring of a normal metal in a double-degenerate persistent-current state with a third auxhiliary level and in the presence of the Aharonov-Bohm flux equal to the half of the normal flux quantum, hc/e, as a qubit. The auxhiliary level can be effectively used for all fundamental quantum logic gate… (More)