dorsal/arxiv
View SchemaSpin squeezing criterion with local unitary invariance
| Authors | A. R. Usha Devi, Xiaoguang Wang, Barry C Sanders |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0304051 |
| URL | https://arxiv.org/abs/quant-ph/0304051 |
| DOI | 10.1023/B:QINP.0000004125.12489.f4 |
| Journal | Quantum Information Processing 2 (3), 207-220 (2003). |
Abstract
We propose a new spin squeezing criterion for arbitrary multi-qubit states that is invariant under local unitary operations. We find that, for arbitrary pure two-qubit states, spin squeezing is equivalent to entanglement, and multi-qubit states are entangled if this new spin squeezing parameter is less than 1.
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"abstract": "We propose a new spin squeezing criterion for arbitrary multi-qubit states\nthat is invariant under local unitary operations. We find that, for arbitrary\npure two-qubit states, spin squeezing is equivalent to entanglement, and\nmulti-qubit states are entangled if this new spin squeezing parameter is less\nthan 1.",
"arxiv_id": "quant-ph/0304051",
"authors": [
"A. R. Usha Devi",
"Xiaoguang Wang",
"Barry C Sanders"
],
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"quant-ph"
],
"doi": "10.1023/B:QINP.0000004125.12489.f4",
"journal_ref": "Quantum Information Processing 2 (3), 207-220 (2003).",
"title": "Spin squeezing criterion with local unitary invariance",
"url": "https://arxiv.org/abs/quant-ph/0304051"
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