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

Research output: Contribution to journal › Article › peer-review

101 Citations (Scopus)

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(R)
Pages (from-to)	020305-1-020305-4
Number of pages	4
Journal	Physical Review A
Volume	79
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevA.79.020305
Publication status	Published - 2009
Externally published	Yes

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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.",

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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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JO - Physical Review A

JF - Physical Review A

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Coupling strength estimation for spin chains despite restricted access

Abstract

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