dorsal/arxiv
View SchemaQuantum computation with un-tunable couplings
| Authors | Xingxiang Zhou, Zheng-Wei Zhou, Guang-Can Guo, Marc J. Feldman |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0209142 |
| URL | https://arxiv.org/abs/quant-ph/0209142 |
| DOI | 10.1103/PhysRevLett.89.197903 |
| Journal | Phys. Rev. Lett. 89, 197903 (2002) |
Abstract
Most quantum computer realizations require the ability to apply local fields and tune the couplings between qubits, in order to realize single bit and two bit gates which are necessary for universal quantum computation. We present a scheme to remove the necessity of switching the couplings between qubits for two bit gates, which are more costly in many cases. Our strategy is to compute in and out of carefully designed interaction free subspaces analogous to decoherence free subspaces, which allows us to effectively turn off and turn on the interactions between the encoded qubits. We give two examples to show how universal quantum computation is realized in our scheme with local manipulations to physical qubits only, for both diagonal and off diagonal interactions.
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"abstract": "Most quantum computer realizations require the ability to apply local fields\nand tune the couplings between qubits, in order to realize single bit and two\nbit gates which are necessary for universal quantum computation. We present a\nscheme to remove the necessity of switching the couplings between qubits for\ntwo bit gates, which are more costly in many cases. Our strategy is to compute\nin and out of carefully designed interaction free subspaces analogous to\ndecoherence free subspaces, which allows us to effectively turn off and turn on\nthe interactions between the encoded qubits. We give two examples to show how\nuniversal quantum computation is realized in our scheme with local\nmanipulations to physical qubits only, for both diagonal and off diagonal\ninteractions.",
"arxiv_id": "quant-ph/0209142",
"authors": [
"Xingxiang Zhou",
"Zheng-Wei Zhou",
"Guang-Can Guo",
"Marc J. Feldman"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevLett.89.197903",
"journal_ref": "Phys. Rev. Lett. 89, 197903 (2002)",
"title": "Quantum computation with un-tunable couplings",
"url": "https://arxiv.org/abs/quant-ph/0209142"
},
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