dorsal/arxiv
View SchemaSpeeding up gate operations through dissipation
| Authors | Almut Beige, Hugo Cable, Carsten Marr, Peter L. Knight |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0405186 |
| URL | https://arxiv.org/abs/quant-ph/0405186 |
| Journal | Laser Phys. 15, 162 (2005). |
Abstract
It is commonly believed that decoherence is the main obstacle to quantum information processing. In contrast to this, we show how decoherence in the form of dissipation can improve the performance of certain quantum gates. As an example we consider the realisations of a controlled phase gate and a two-qubit SWAP operation with the help of a single laser pulse in atom-cavity systems. In the presence of spontaneous decay rates, the speed of the gates can be improved by a factor 2 without sacrificing high fidelity and robustness against parameter fluctuations. Even though this leads to finite gate failure rates, the scheme is comparable with other quantum computing proposals.
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"abstract": "It is commonly believed that decoherence is the main obstacle to quantum\ninformation processing. In contrast to this, we show how decoherence in the\nform of dissipation can improve the performance of certain quantum gates. As an\nexample we consider the realisations of a controlled phase gate and a two-qubit\nSWAP operation with the help of a single laser pulse in atom-cavity systems. In\nthe presence of spontaneous decay rates, the speed of the gates can be improved\nby a factor 2 without sacrificing high fidelity and robustness against\nparameter fluctuations. Even though this leads to finite gate failure rates,\nthe scheme is comparable with other quantum computing proposals.",
"arxiv_id": "quant-ph/0405186",
"authors": [
"Almut Beige",
"Hugo Cable",
"Carsten Marr",
"Peter L. Knight"
],
"categories": [
"quant-ph"
],
"journal_ref": "Laser Phys. 15, 162 (2005).",
"title": "Speeding up gate operations through dissipation",
"url": "https://arxiv.org/abs/quant-ph/0405186"
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