dorsal/arxiv
View SchemaControl of decoherence: analysis and comparison of three different strategies
| Authors | P. Facchi, S. Tasaki, S. Pascazio, H. Nakazato, A. Tokuse, D. A. Lidar |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0403205 |
| URL | https://arxiv.org/abs/quant-ph/0403205 |
| DOI | 10.1103/PhysRevA.71.022302 |
| Journal | Phys. Rev. A 71 (2005) 022302 |
Abstract
We analyze and compare three different strategies, all aimed at controlling and eventually halting decoherence. The first strategy hinges upon the quantum Zeno effect, the second makes use of frequent unitary interruptions ("bang-bang" pulses and their generalization, quantum dynamical decoupling), and the third of a strong, continuous coupling. Decoherence is shown to be suppressed only if the frequency N of the measurements/pulses is large enough or if the coupling K is sufficiently strong. Otherwise, if N or K are large, but not extremely large, all these control procedures accelerate decoherence. We investigate the problem in a general setting and then consider some practical examples, relevant for quantum computation.
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"abstract": "We analyze and compare three different strategies, all aimed at controlling\nand eventually halting decoherence. The first strategy hinges upon the quantum\nZeno effect, the second makes use of frequent unitary interruptions\n(\"bang-bang\" pulses and their generalization, quantum dynamical decoupling),\nand the third of a strong, continuous coupling. Decoherence is shown to be\nsuppressed only if the frequency N of the measurements/pulses is large enough\nor if the coupling K is sufficiently strong. Otherwise, if N or K are large,\nbut not extremely large, all these control procedures accelerate decoherence.\nWe investigate the problem in a general setting and then consider some\npractical examples, relevant for quantum computation.",
"arxiv_id": "quant-ph/0403205",
"authors": [
"P. Facchi",
"S. Tasaki",
"S. Pascazio",
"H. Nakazato",
"A. Tokuse",
"D. A. Lidar"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.71.022302",
"journal_ref": "Phys. Rev. A 71 (2005) 022302",
"title": "Control of decoherence: analysis and comparison of three different strategies",
"url": "https://arxiv.org/abs/quant-ph/0403205"
},
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