Realization of quantum process tomography in NMR

作者：Andrew M. Childs, Isaac L. Chuang, Debbie Leung · 发表于：Physical Review A · 年份：2001 · DOI：10.1103/physreva.64.012314 · 被引用次数：211 · 研究领域：Quantum Computing Algorithms and Architecture、Quantum Information and Cryptography、Quantum Mechanics and Applications

Quantum process tomography is a procedure by which the unknown dynamical evolution of an open quantum system can be fully experimentally characterized. We demonstrate explicitly how this procedure can be implemented with a nuclear magnetic resonance quantum computer. This allows us to measure the fidelity of a controlled-NOT logic gate and to experimentally investigate the error model for our computer. Based on the latter analysis, we test an important assumption underlying many models of quantum error correction, the independence of errors on different qubits.