Measurement-Based Interference in Quantum Computation  

作　　者：徐酉阳 

机构地区：[1]Faculty of Science,Kunming University of Science and Technology

出　　处：《Communications in Theoretical Physics》2013年第9期289-295,共7页理论物理通讯（英文版）

摘　　要：The interference has been measured by the visibility in two-level systems, which, however, does not work for multi-level systems. We generalize a measure of the interference based on decoherence process, consistent with the visibility in qubit systems. By taking duster states as examples, we show in the one-way quantum computation that the gate fidelity is proportional to the interference of the measured qubit and is inversely proportional to the interference of all register qubits. We also find that the interference increases with the number of the computing steps. So we conjecture that the interference may be the source of the speedup of the one-way quantum computation.

关 键 词：quantum interference quantum computation quantum speedup 

分 类 号：O413[理学—理论物理] TP301.6[理学—物理]