QUANTUM BIT VARIABLE COUPLING METHOD, QUANTUM COMPUTING CIRCUIT USING THE METHOD, AND VARIABLE COUPLER

摘要

There is provided a quantum computing circuit comprising first and second superconductive magnetic flux quantum bit elements (101, 102) and a coupling superconductive magnetic flux quantum bit element (103). The first and second superconductive magnetic flux quantum bit elements form superconductive loops including a plurality of Josephson junctions, are biased at a half-quantum magnetic flux, and have mutually different characteristic frequencies. The coupling superconductive magnetic flux quantum bit clement performs variable control between the elements (101, 102) in a parametric way by applying a microwave magnetic field pulse equal to the frequency difference between the elements (101, 102).