  Superconducting quantum circuit is a promising system for building quantum
computer. With this system we demonstrate the universal quantum computations,
including the preparing of initial states, the single-qubit operations, the
two-qubit universal gate operations between arbitrary qubits, the multiple
pairs of two-qubit gate operations in parallel, the coupling operations on a
group of qubits in parallel, the coupling operations on multiple groups of
qubits in parallel, the coupling operations on multiple pairs and multiple
groups of qubits in parallel. Within available technology, a universal quantum
computer consists of more than 50 qubits allowing operations is achievable with
the design.

Quantum Physics