Indirect Hamiltonian Identification through a small gateway

Details Indirect Hamiltonian Identification through a small gateway Indirect Hamiltonian Identification through a small gateway

2009-03-03

arxiv.org/abs/0903.0612v1

New J. Phys. 11 (2009) 103019

Physics

Quantum Physics

5 pages, 1 figure; see Video Abstract at http://www.quantiki.org/video_abstracts/09030612

Scientific paper

10.1088/1367-2630/11/10/103019

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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