dorsal/arxiv
View SchemaPerturbative Formulation and Non-adiabatic Corrections in Adiabatic Quantum Computing Schemes
| Authors | Yu Shi, Yong-Shi Wu |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0304130 |
| URL | https://arxiv.org/abs/quant-ph/0304130 |
| DOI | 10.1103/PhysRevA.69.024301 |
| Journal | Phy. Rev. A 69, 024301 (2004) |
Abstract
Adiabatic limit is the presumption of the adiabatic geometric quantum computation and of the adiabatic quantum algorithm. But in reality, the variation speed of the Hamiltonian is finite. Here we develop a general formulation of adiabatic quantum computing, which accurately describes the evolution of the quantum state in a perturbative way, in which the adiabatic limit is the zeroth-order approximation. As an application of this formulation, non-adiabatic correction or error is estimated for several physical implementations of the adiabatic geometric gates. A quantum computing process consisting of many adiabatic gate operations is considered, for which the total non-adiabatic error is found to be about the sum of those of all the gates. This is a useful constraint on the computational power. The formalism is also briefly applied to the adiabatic quantum algorithm.
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"abstract": "Adiabatic limit is the presumption of the adiabatic geometric quantum\ncomputation and of the adiabatic quantum algorithm. But in reality, the\nvariation speed of the Hamiltonian is finite. Here we develop a general\nformulation of adiabatic quantum computing, which accurately describes the\nevolution of the quantum state in a perturbative way, in which the adiabatic\nlimit is the zeroth-order approximation. As an application of this formulation,\nnon-adiabatic correction or error is estimated for several physical\nimplementations of the adiabatic geometric gates. A quantum computing process\nconsisting of many adiabatic gate operations is considered, for which the total\nnon-adiabatic error is found to be about the sum of those of all the gates.\nThis is a useful constraint on the computational power. The formalism is also\nbriefly applied to the adiabatic quantum algorithm.",
"arxiv_id": "quant-ph/0304130",
"authors": [
"Yu Shi",
"Yong-Shi Wu"
],
"categories": [
"quant-ph",
"cond-mat"
],
"doi": "10.1103/PhysRevA.69.024301",
"journal_ref": "Phy. Rev. A 69, 024301 (2004)",
"title": "Perturbative Formulation and Non-adiabatic Corrections in Adiabatic Quantum Computing Schemes",
"url": "https://arxiv.org/abs/quant-ph/0304130"
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