Strauch Frederick W, Johnson Philip R, Dragt Alex J, Lobb C J, Anderson J R, Wellstood F C
Department of Physics, University of Maryland, College Park, Maryland 20742-4111, USA.
Phys Rev Lett. 2003 Oct 17;91(16):167005. doi: 10.1103/PhysRevLett.91.167005. Epub 2003 Oct 16.
Based on a quantum analysis of two capacitively coupled current-biased Josephson junctions, we propose two fundamental two-qubit quantum logic gates. Each of these gates, when supplemented by single-qubit operations, is sufficient for universal quantum computation. Numerical solutions of the time-dependent Schrödinger equation demonstrate that these operations can be performed with good fidelity.
