dorsal/arxiv
View SchemaTesting Bell's inequality in constantly coupled Josephson circuits by effective single-qubit operations
| Authors | L. F. Wei, Yu-xi Liu, Franco Nori |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0408089 |
| URL | https://arxiv.org/abs/quant-ph/0408089 |
| DOI | 10.1103/PhysRevB.72.104516 |
| Journal | Phys. Rev. B 72, 104516 (2005) |
Abstract
In superconducting circuits with interbit untunable (e.g., capacitive) couplings, ideal local quantum operations cannot be exactly performed on individual Josephson qubits. Here we propose an effective dynamical decoupling approach to overcome the "fixed-interaction" difficulty for effectively implementing elemental logical gates for quantum computation. The proposed single-qubit operations and local measurements should allow testing Bell's inequality with a pair of capacitively-coupled Josephson qubits. This provides a powerful approach, besides spectral-analysis [Nature \textbf{421}, 823 (2003); Science \textbf{300}, 1548 (2003)], to verify the existence of macroscopic quantum entanglement between two fixed-coupling Josephson qubits.
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"abstract": "In superconducting circuits with interbit untunable (e.g., capacitive)\ncouplings, ideal local quantum operations cannot be exactly performed on\nindividual Josephson qubits. Here we propose an effective dynamical decoupling\napproach to overcome the \"fixed-interaction\" difficulty for effectively\nimplementing elemental logical gates for quantum computation. The proposed\nsingle-qubit operations and local measurements should allow testing Bell\u0027s\ninequality with a pair of capacitively-coupled Josephson qubits. This provides\na powerful approach, besides spectral-analysis [Nature \\textbf{421}, 823\n(2003); Science \\textbf{300}, 1548 (2003)], to verify the existence of\nmacroscopic quantum entanglement between two fixed-coupling Josephson qubits.",
"arxiv_id": "quant-ph/0408089",
"authors": [
"L. F. Wei",
"Yu-xi Liu",
"Franco Nori"
],
"categories": [
"quant-ph",
"cond-mat.mes-hall",
"cond-mat.mtrl-sci",
"cond-mat.supr-con"
],
"doi": "10.1103/PhysRevB.72.104516",
"journal_ref": "Phys. Rev. B 72, 104516 (2005)",
"title": "Testing Bell\u0027s inequality in constantly coupled Josephson circuits by effective single-qubit operations",
"url": "https://arxiv.org/abs/quant-ph/0408089"
},
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