Patent ID: 6563311
Filing Date: 2003-05-13
Classification: B82Y,G06N,H01L,Y10S

Abstract:
A quantum computing method comprising:cooling a structure including a superconducting bank and a superconducting mesoscopic island to a temperature that suppresses thermal excitations in said structure sufficiently to suppress thermal sources of decoherence, the structure including a clean Josephson junction between the superconducting mesoscopic island and the superconducting bank; establishing a quantum state of a supercurrent at the junction, wherein the quantum state is an admixture of a first state having a first magnetic moment and a second state having a second magnetic moment; allowing the quantum state of the supercurrent at the junction to evolve according to probabilities for tunneling between the first and second state; and measuring magnetic flux at the junction to determine a result of the quantum computing.