Eltschka, Christopher and Siewert, Jens (2012) A quantitative witness for Greenberger-Horne-Zeilinger entanglement. SCIENTIFIC REPORTS, 2: 942. ISSN 2045-2322,
Full text not available from this repository. (Request a copy)Abstract
Along with the vast progress in experimental quantum technologies there is an increasing demand for the quantification of entanglement between three or more quantum systems. Theory still does not provide adequate tools for this purpose. The objective is, besides the quest for exact results, to develop operational methods that allow for efficient entanglement quantification. Here we put forward an analytical approach that serves both these goals. We provide a simple procedure to quantify Greenberger-Horne-Zeilinger-type multipartite entanglement in arbitrary three-qubit states. For two qubits this method is equivalent to Wootters' seminal result for the concurrence. It establishes a close link between entanglement quantification and entanglement detection by witnesses, and can be generalised both to higher dimensions and to more than three parties.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | STATE; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics Physics > Institute of Theroretical Physics > Chair Professor Richter > Group Jaroslav Fabian |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 30 Apr 2020 12:03 |
| Last Modified: | 30 Apr 2020 12:03 |
| URI: | https://pred.uni-regensburg.de/id/eprint/17602 |
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