Indirect Hamiltonian identification through a small gateway
Indirect Hamiltonian identification through a small gateway
复制标题
DOI：
10.1088/1367-2630/11/10/103019
复制
发表时间：
2009-10-07
影响因子：
3.3
通讯作者：
Maruyama, Koji
中科院分区：
文献类型：
--
作者：
Burgarth, Daniel;Maruyama, Koji
确定一个大量子系统的多体哈密顿量对于理解许多物理现象是必不可少的，但总的来说是极其困难的。我们证明了在已知耦合拓扑的情况下，可以通过网关间接估计自旋1/2粒子网络中的耦合强度。识别可行性的标准仅通过关于网关如何连接到整个网络的简单拓扑属性来描述。我们还解决了过程效率的问题，以及如何消除系统的退化。
Identifying the many-body Hamiltonian of a large quantum system is essential in understanding many physical phenomena, yet extremely difficult in general. We show that coupling strengths in networks of spin-1/2 particles can be estimated indirectly through a gateway, provided that the coupling topology is known. The criterion for the feasibility of identification is described only by a simple topological property concerning how the gateway is connected to the entire network. We also address the issues of process efficiency and how degeneracies of the system can be lifted.