dorsal/arxiv
View SchemaA measurable entanglement criterion for two qubits
| Authors | Hoshang Heydari, Gunnar Björk, Luis Sánchez-Soto |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0308091 |
| URL | https://arxiv.org/abs/quant-ph/0308091 |
| DOI | 10.1103/PhysRevA.68.062314 |
| Journal | Phys. Rev. A, vol. 68, pp. 062314/1-4, 2003 |
Abstract
We propose a directly measurable criterion for the entanglement of two qubits. We compare the criterion with other criteria, and we find that for pure states, and some mixed states, it coincides with the state's concurrency. The measure can be obtained with a Bell state analyser and the ability to make general local unitary transformations. However, the procedure fails to measure the entanglement of a general mixed two-qubit state.
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"abstract": "We propose a directly measurable criterion for the entanglement of two\nqubits. We compare the criterion with other criteria, and we find that for pure\nstates, and some mixed states, it coincides with the state\u0027s concurrency. The\nmeasure can be obtained with a Bell state analyser and the ability to make\ngeneral local unitary transformations. However, the procedure fails to measure\nthe entanglement of a general mixed two-qubit state.",
"arxiv_id": "quant-ph/0308091",
"authors": [
"Hoshang Heydari",
"Gunnar Bj\u00f6rk",
"Luis S\u00e1nchez-Soto"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.68.062314",
"journal_ref": "Phys. Rev. A, vol. 68, pp. 062314/1-4, 2003",
"title": "A measurable entanglement criterion for two qubits",
"url": "https://arxiv.org/abs/quant-ph/0308091"
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