Phys. Rev. Lett. 102, 187203 (2009) [4 pages]Hamiltonian Tomography in an Access-Limited Setting without State InitializationReceived 24 December 2008; revised 9 March 2009; published 5 May 2009 We propose a scheme for the determination of the coupling parameters in a chain of interacting spins. This requires only time-resolved measurements over a single particle, simple data postprocessing and no state initialization or prior knowledge of the state of the chain. The protocol fits well into the context of quantum-dynamics characterization and is efficient even when the spin chain is affected by general dissipative and dephasing channels. We illustrate the performance of the scheme by analyzing explicit examples and discuss possible extensions. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.102.187203
DOI:
10.1103/PhysRevLett.102.187203
PACS:
75.10.Pq, 03.65.Wj, 03.65.Yz
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