dorsal/arxiv
View SchemaGeneration and Suppression of Decoherence in Artificial Environment for Qubit System
| Authors | Yasushi Kondo, Mikio Nakahara, Shogo Tanimura, Sachiko Kitajima, Chikako Uchiyama, Fumiaki Shibata |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0608134 |
| URL | https://arxiv.org/abs/quant-ph/0608134 |
| DOI | 10.1143/JPSJ.76.074002 |
Abstract
It is known that a quantum system with finite degrees of freedom can simulate a composite of a system and an environment if the state of the hypothetical environment is randomized by external manipulation. We show theoretically that any phase decoherence phenomena of a single qubit can be simulated with a two-qubit system and demonstrate experimentally two examples: one is phase decoherence of a single qubit in a transmission line, and the other is that in a quantum memory. We perform NMR experiments employing a two-spin molecule and clearly measure decoherence for both cases. We also prove experimentally that the bang-bang control efficiently suppresses decoherence.
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"abstract": "It is known that a quantum system with finite degrees of freedom can simulate\na composite of a system and an environment if the state of the hypothetical\nenvironment is randomized by external manipulation. We show theoretically that\nany phase decoherence phenomena of a single qubit can be simulated with a\ntwo-qubit system and demonstrate experimentally two examples: one is phase\ndecoherence of a single qubit in a transmission line, and the other is that in\na quantum memory. We perform NMR experiments employing a two-spin molecule and\nclearly measure decoherence for both cases. We also prove experimentally that\nthe bang-bang control efficiently suppresses decoherence.",
"arxiv_id": "quant-ph/0608134",
"authors": [
"Yasushi Kondo",
"Mikio Nakahara",
"Shogo Tanimura",
"Sachiko Kitajima",
"Chikako Uchiyama",
"Fumiaki Shibata"
],
"categories": [
"quant-ph"
],
"doi": "10.1143/JPSJ.76.074002",
"title": "Generation and Suppression of Decoherence in Artificial Environment for Qubit System",
"url": "https://arxiv.org/abs/quant-ph/0608134"
},
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