dorsal/arxiv
View SchemaProtecting Quantum Information Encoded in Decoherence Free States Against Exchange Errors
| Authors | Daniel A. Lidar, David Bacon, Julia Kempe, K. Birgitta Whaley |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/9907096 |
| URL | https://arxiv.org/abs/quant-ph/9907096 |
| DOI | 10.1103/PhysRevA.61.052307 |
| Journal | Phys. Rev. A Vol. 61(5), p. 52307 (2000) |
Abstract
The exchange interaction between identical qubits in a quantum information processor gives rise to unitary two-qubit errors. It is shown here that decoherence free subspaces (DFSs) for collective decoherence undergo Pauli errors under exchange, which however do not take the decoherence free states outside of the DFS. In order to protect DFSs against these errors it is sufficient to employ a recently proposed concatenated DFS-quantum error correcting code scheme [D.A. Lidar, D. Bacon and K.B. Whaley, Phys. Rev. Lett. {\bf 82}, 4556 (1999)].
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"abstract": "The exchange interaction between identical qubits in a quantum information\nprocessor gives rise to unitary two-qubit errors. It is shown here that\ndecoherence free subspaces (DFSs) for collective decoherence undergo Pauli\nerrors under exchange, which however do not take the decoherence free states\noutside of the DFS. In order to protect DFSs against these errors it is\nsufficient to employ a recently proposed concatenated DFS-quantum error\ncorrecting code scheme [D.A. Lidar, D. Bacon and K.B. Whaley, Phys. Rev. Lett.\n{\\bf 82}, 4556 (1999)].",
"arxiv_id": "quant-ph/9907096",
"authors": [
"Daniel A. Lidar",
"David Bacon",
"Julia Kempe",
"K. Birgitta Whaley"
],
"categories": [
"quant-ph",
"cond-mat"
],
"doi": "10.1103/PhysRevA.61.052307",
"journal_ref": "Phys. Rev. A Vol. 61(5), p. 52307 (2000)",
"title": "Protecting Quantum Information Encoded in Decoherence Free States Against Exchange Errors",
"url": "https://arxiv.org/abs/quant-ph/9907096"
},
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