dorsal/arxiv
View SchemaEfficient error characterization in Quantum Information Processing
| Authors | Benjamin Lévi, Cecilia C. López, Joseph Emerson, D. G. Cory |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0608246 |
| URL | https://arxiv.org/abs/quant-ph/0608246 |
| DOI | 10.1103/PhysRevA.75.022314 |
| Journal | Phys. Rev. A 75, 022314 (2007) |
Abstract
We describe how to use the fidelity decay as a tool to characterize the errors affecting a quantum information processor through a noise generator $G_{\tau}$. For weak noise, the initial decay rate of the fidelity proves to be a simple way to measure the magnitude of the different terms in $G_{\tau}$. When the generator has only terms associated with few-body couplings, our proposal is scalable. We present the explicit protocol for estimating the magnitude of the noise generators when the noise consists of only one and two-body terms, and describe a method for measuring the parameters of more general noise models. The protocol focuses on obtaining the magnitude with which these terms affect the system during a time step of length $\tau$; measurement of this information has critical implications for assesing the scalability of fault-tolerant quantum computation in any physical setup.
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"abstract": "We describe how to use the fidelity decay as a tool to characterize the\nerrors affecting a quantum information processor through a noise generator\n$G_{\\tau}$. For weak noise, the initial decay rate of the fidelity proves to be\na simple way to measure the magnitude of the different terms in $G_{\\tau}$.\nWhen the generator has only terms associated with few-body couplings, our\nproposal is scalable. We present the explicit protocol for estimating the\nmagnitude of the noise generators when the noise consists of only one and\ntwo-body terms, and describe a method for measuring the parameters of more\ngeneral noise models. The protocol focuses on obtaining the magnitude with\nwhich these terms affect the system during a time step of length $\\tau$;\nmeasurement of this information has critical implications for assesing the\nscalability of fault-tolerant quantum computation in any physical setup.",
"arxiv_id": "quant-ph/0608246",
"authors": [
"Benjamin L\u00e9vi",
"Cecilia C. L\u00f3pez",
"Joseph Emerson",
"D. G. Cory"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.75.022314",
"journal_ref": "Phys. Rev. A 75, 022314 (2007)",
"title": "Efficient error characterization in Quantum Information Processing",
"url": "https://arxiv.org/abs/quant-ph/0608246"
},
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