Coupling strength estimation for spin chains despite restricted access

Franco Nori; Koji Maruyama; Daniel Burgarth

doi:10.1103/PhysRevA.79.020305

Coupling strength estimation for spin chains despite restricted access

Franco Nori, Koji Maruyama, Daniel Burgarth

Department of Physics

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99 Citations (Scopus)

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Abstract

Quantum control requires full knowledge of the system many-body Hamiltonian. In many cases this information is not directly available due to restricted access to the system. Here we show how to indirectly estimate all the coupling strengths in a spin chain by measuring one spin at the end of the chain. We also discuss the efficiency of this “quantum inverse problem” and give a numerical example.

Original language	English
Journal	Physical Review A
Volume	79
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevA.79.020305
Publication status	Published - 26 Sept 2011

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title = "Coupling strength estimation for spin chains despite restricted access",

abstract = "Quantum control requires full knowledge of the system many-body Hamiltonian. In many cases this information is not directly available due to restricted access to the system. Here we show how to indirectly estimate all the coupling strengths in a spin chain by measuring one spin at the end of the chain. We also discuss the efficiency of this “quantum inverse problem” and give a numerical example.",

author = "Franco Nori and Koji Maruyama and Daniel Burgarth",

note = "D. Burgarth, K. Maruyama and F. Nori, Coupling strength estimation for spin chains despite restricted access Phys. Rev. A 79, 020305(R) (2009).",

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N2 - Quantum control requires full knowledge of the system many-body Hamiltonian. In many cases this information is not directly available due to restricted access to the system. Here we show how to indirectly estimate all the coupling strengths in a spin chain by measuring one spin at the end of the chain. We also discuss the efficiency of this “quantum inverse problem” and give a numerical example.

AB - Quantum control requires full knowledge of the system many-body Hamiltonian. In many cases this information is not directly available due to restricted access to the system. Here we show how to indirectly estimate all the coupling strengths in a spin chain by measuring one spin at the end of the chain. We also discuss the efficiency of this “quantum inverse problem” and give a numerical example.

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DO - 10.1103/PhysRevA.79.020305

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Coupling strength estimation for spin chains despite restricted access

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