Hamiltonian tomography in an access-limited setting without state initialization

Details Hamiltonian tomography in an access-limited setting without state initialization Hamiltonian tomography in an access-limited setting without state initialization

2008-12-18

arxiv.org/abs/0812.3510v2

Phys. Rev. Lett. 102, 187203 (2009)

Physics

Quantum Physics

4 pages, 2 figures, RevTeX4

Scientific paper

10.1103/PhysRevLett.102.187203

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 post-processing 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.

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