dorsal/arxiv
View SchemaRobustness of Multi-Party Entanglement
| Authors | Christoph Simon, Julia Kempe |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0109102 |
| URL | https://arxiv.org/abs/quant-ph/0109102 |
| DOI | 10.1103/PhysRevA.65.052327 |
| Journal | Phys. Rev. A, Vol. 65 (5), 052327 (2002) |
Abstract
How common is large-scale entanglement in nature? As a first step towards addressing this question, we study the robustness of multi-party entanglement under local decoherence, modeled by partially depolarizing channels acting independently on each subsystem. Surprisingly, we find that n-qubit GHZ entanglement can stand more than 55 % local depolarization in the limit of n going to infinity, and that GHZ states are more robust than other generic states of 3 and 4 qubits. We also study spin-squeezed states in the limit n going to infinity and find that they too can stand considerable local depolarization.
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"abstract": "How common is large-scale entanglement in nature? As a first step towards\naddressing this question, we study the robustness of multi-party entanglement\nunder local decoherence, modeled by partially depolarizing channels acting\nindependently on each subsystem. Surprisingly, we find that n-qubit GHZ\nentanglement can stand more than 55 % local depolarization in the limit of n\ngoing to infinity, and that GHZ states are more robust than other generic\nstates of 3 and 4 qubits. We also study spin-squeezed states in the limit n\ngoing to infinity and find that they too can stand considerable local\ndepolarization.",
"arxiv_id": "quant-ph/0109102",
"authors": [
"Christoph Simon",
"Julia Kempe"
],
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"quant-ph"
],
"doi": "10.1103/PhysRevA.65.052327",
"journal_ref": "Phys. Rev. A, Vol. 65 (5), 052327 (2002)",
"title": "Robustness of Multi-Party Entanglement",
"url": "https://arxiv.org/abs/quant-ph/0109102"
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