dorsal/arxiv
View SchemaAlways On Non-Nearest-Neighbor Coupling in Scalable Quantum Computing
| Authors | Yong Hu, Zheng-Wei Zhou, Guang-Can Guo |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0605175 |
| URL | https://arxiv.org/abs/quant-ph/0605175 |
| DOI | 10.1088/1367-2630/9/2/027 |
Abstract
We investigate the non-nearest-neighbor interaction effect in 1-D spin-1/2 chain model. In many previous schemes this long-range coupling is omitted because of its relative weak strength compared with the nearest-neighbor coupling. We show that the quantum gate deviation induced by the omitted long-range interaction depends on not only its strength but also the scale of the system. This implies that omitting the long-range interaction may challenge the scalability of previous schemes. We further consider how to suppress this unwanted effect. We propose a quantum computation scheme. In this scheme, by using appropriate encoding method, we effectively negate the influence of the next-nearest-neighbor interaction in order to improve the precision of quantum gates. We also discuss the feasibility of this scheme in 1-D Josephson charge qubit array system. This work may offer improvement in scalable quantum computing.
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"abstract": "We investigate the non-nearest-neighbor interaction effect in 1-D spin-1/2\nchain model. In many previous schemes this long-range coupling is omitted\nbecause of its relative weak strength compared with the nearest-neighbor\ncoupling. We show that the quantum gate deviation induced by the omitted\nlong-range interaction depends on not only its strength but also the scale of\nthe system. This implies that omitting the long-range interaction may challenge\nthe scalability of previous schemes. We further consider how to suppress this\nunwanted effect. We propose a quantum computation scheme. In this scheme, by\nusing appropriate encoding method, we effectively negate the influence of the\nnext-nearest-neighbor interaction in order to improve the precision of quantum\ngates. We also discuss the feasibility of this scheme in 1-D Josephson charge\nqubit array system. This work may offer improvement in scalable quantum\ncomputing.",
"arxiv_id": "quant-ph/0605175",
"authors": [
"Yong Hu",
"Zheng-Wei Zhou",
"Guang-Can Guo"
],
"categories": [
"quant-ph"
],
"doi": "10.1088/1367-2630/9/2/027",
"title": "Always On Non-Nearest-Neighbor Coupling in Scalable Quantum Computing",
"url": "https://arxiv.org/abs/quant-ph/0605175"
},
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