通过一个小网关的间接哈密尔顿识别
Indirect Hamiltonian Identification through a small gateway
摘要：
确定量子系统中相互作用的性质对于理解任何物理现象都是至关重要的。在多体系统中，获取关于哈密顿量的信息可能是一项艰巨的挑战，因为它通常需要访问系统的所有部分。我们表明，如果耦合拓扑结构是已知的，哈密顿识别确实是可能的间接，即使只有一个小的网关系统使用。令人惊讶的是，即使是简并的哈密顿量也可以通过向网关施加额外的场来估计。
英文摘要：
Identifying the nature of interactions in a quantum system is essential in understanding any physical phenomena. Acquiring information on the Hamiltonian can be a tough challenge in many-body systems because it generally requires access to all parts of the system. We show that if the coupling topology is known, the Hamiltonian identification is indeed possible indirectly even though only a small gateway to the system is used. Surprisingly, even a degenerate Hamiltonian can be estimated by applying an extra field to the gateway.
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