An efficient scheme for implementing an N-qubit toffoli gate with superconducting quantum-interference devices in cavity QED

作者：An Shou Zheng^*; Liu Ji Bing; Dong Xiang; Cui Lan Liu; Hong Yuan

来源：Chinese Physics Letters, 2007, 24(9): 2489-2492.

DOI：10.1088/0256-307X/24/9/008

An alternative approach is proposed to realize an n-qubit Toffloli gate with supeconducting quantum-interference device (SQUIDs) in cavity quantum electrodynamics (QED). In the proposal, we represent two logical gates of a qubit with the two lowest levels of SQUID while a higher-energy intermediate level of each SQUID is utilized for the gate manipulation. During the operating process, because the cavity field is always in vacuum state, the requriement on the cavity is greatly loosend and there is no trnasfer of quantum information between the cavity and SQUIDs.

• 出版日期2007-9
• 单位华中科技大学; 中国地质大学（北京）