1208.1345 (Chui-Ping Yang)

A proposal for realizing a 3-qubit controlled-phase gate with
superconducting qubit systems coupled to a cavity    [PDF]

Chui-Ping Yang

We present a way to realize a 3-qubit quantum controlled-phase gate with superconducting qubit systems coupled to a cavity. This proposal does not require adjustment of the qubit level spacings or identical qubit-cavity coupling constants. Moreover, since only a resonant interaction is applied, the gate can be performed fast, within $\sim $ 10 nanosecond. This proposal is quite general, which can be applied to various types of superconducting qubits, atoms trapped in a cavity, or quantum dots coupled to a resonator.

View original: http://arxiv.org/abs/1208.1345