Experimental quantum Hamiltonian identification from measurement time traces  

作　　者：Shi-Yao Hou Hang Li Gui-Lu Long 

机构地区：[1]Microsystem&Terahertz Research Center and Institute of Electronic Engineering,China Academy of Engineering Physics,Mianyang 621999,China [2]State Key Laboratory of Low-dimensional Quantum Physics and Department of Physics,Tsinghua University,Beijing 100084,China [3]The Innovative Center of Quantum Matter,Beijing 100084,China [4]Tsinghua National Laboratory of Information Science and Technology,Beijing 100084,China

出　　处：《Science Bulletin》2017年第12期863-868,共6页科学通报（英文版）

基　　金：supported by the National Natural Science Foundation of China(11175094 and 91221205);the National Basic Research Program of China(2011CB9216002)

摘　　要：Identifying Hamiltonian of a quantum system is of vital importance for quantum information processing.In this article, we realized and benchmarked a quantum Hamiltonian identification algorithm recently proposed(Zhang and Sarovar, 2014). we realized the algorithm on a liquid nuclear magnetic resonance quantum information processor using two types of working media with different forms of Hamiltonian. Our experiment realized the quantum identification algorithm based on free induction decay signals. We also showed how to process data obtained in a practical experiment. We studied the influence of decoherence by numerical simulations. Our experiments and simulations demonstrate that the algorithm is effective and robust.Identifying Hamiltonian of a quantum system is of vital importance for quantum information processing. In this article, we realized and benchmarked a quantum Hamiltonian identification algorithm recently proposed （Zhang and Sarovar, 2014）. we realized the algorithm on a liquid nuclear magnetic resonance quantum information processor using two types of working media with different forms of Hamiltonian. Our experiment realized the quantum identification algorithm based on free induction decay signals. We also showed how to process data obtained in a practical experiment. We studied the influence of decoherence by numerical simulations. Our experiments and simulations demonstrate that the algorithm is effective and robust.

关 键 词：Quantum informationHamiltonian identificationMeasurement time tracesExperimental realizationNuclear magnetic resonance 

分 类 号：O413[理学—理论物理] TP391.41[理学—物理]