Coupling strength estimation for spin chains despite restricted access

Daniel Burgarth; Koji Maruyama; Franco Nori

doi:10.1103/PhysRevA.79.020305

Coupling strength estimation for spin chains despite restricted access

Daniel Burgarth^*, Koji Maruyama, Franco Nori

^*Corresponding author for this work

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101 Scopus citations

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
Article number	020305
Journal	Physical Review A - Atomic, Molecular, and Optical Physics
Volume	79
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevA.79.020305
State	Published - 2009/02/26

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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10.1103/PhysRevA.79.020305

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

year = "2009",

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doi = "10.1103/PhysRevA.79.020305",

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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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M3 - 学術論文

AN - SCOPUS:62549129103

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JO - Physical Review A - Atomic, Molecular, and Optical Physics

JF - Physical Review A - Atomic, Molecular, and Optical Physics

IS - 2

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Coupling strength estimation for spin chains despite restricted access

Abstract

ASJC Scopus subject areas

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