dorsal/arxiv
View SchemaContinuous quantum error correction via quantum feedback control
| Authors | Charlene Ahn, Andrew C. Doherty, Andrew J. Landahl |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0110111 |
| URL | https://arxiv.org/abs/quant-ph/0110111 |
| DOI | 10.1103/PhysRevA.65.042301 |
| Journal | Phys. Rev. A 65, 042301 (2002) |
Abstract
We describe a protocol for continuously protecting unknown quantum states from decoherence that incorporates design principles from both quantum error correction and quantum feedback control. Our protocol uses continuous measurements and Hamiltonian operations, which are weaker control tools than are typically assumed for quantum error correction. We develop a cost function appropriate for unknown quantum states and use it to optimize our state-estimate feedback. Using Monte Carlo simulations, we study our protocol for the three-qubit bit-flip code in detail and demonstrate that it can improve the fidelity of quantum states beyond what is achievable using quantum error correction when the time between quantum error correction cycles is limited.
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"abstract": "We describe a protocol for continuously protecting unknown quantum states\nfrom decoherence that incorporates design principles from both quantum error\ncorrection and quantum feedback control. Our protocol uses continuous\nmeasurements and Hamiltonian operations, which are weaker control tools than\nare typically assumed for quantum error correction. We develop a cost function\nappropriate for unknown quantum states and use it to optimize our\nstate-estimate feedback. Using Monte Carlo simulations, we study our protocol\nfor the three-qubit bit-flip code in detail and demonstrate that it can improve\nthe fidelity of quantum states beyond what is achievable using quantum error\ncorrection when the time between quantum error correction cycles is limited.",
"arxiv_id": "quant-ph/0110111",
"authors": [
"Charlene Ahn",
"Andrew C. Doherty",
"Andrew J. Landahl"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.65.042301",
"journal_ref": "Phys. Rev. A 65, 042301 (2002)",
"title": "Continuous quantum error correction via quantum feedback control",
"url": "https://arxiv.org/abs/quant-ph/0110111"
},
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