Adaptive-measurement based quantum tomography

• 来源期刊: 中国科学:物理学 力学 天文学（英文版）
• 年，卷（期）: 2017,（2）
• 页码范围: 76-77
• 页数: 2页
• 语种: 中文
• DOI: 10.1007/s11433-016-0416-3

摘要

Quantum state tomography (QST) concerns a complete description of arbitrary unknown quantum states by using experimental data from quantum measurements.The adaptive measurement,i.e.,repeated measurement of an observable utilizing prior measurement outcomes and adapting to changing experimental conditions,has great potential for various purposes in quantum information sciences like QST.An open problem left for QST is how many measurements are needed to determine unknown quantum states.