| Autor: |
G S Thekkadath, Liang Jiang, J H Thywissen |
| Předmět: |
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| Zdroj: |
Journal of Physics B: Atomic, Molecular & Optical Physics; 11/14/2016, Vol. 49 Issue 21, p1-1, 1p |
| Abstrakt: |
We show that the singlet fraction ps and total magnetisation (or polarisation) m can bound the minimum concurrence in an ensemble of spins. We identify as a sufficient and tight condition for bipartite entanglement. Our proof makes no assumptions about the state of the system or symmetry of the particles, and can therefore be used as a witness for spin entanglement between fermions. We discuss the implications for recent experiments in which spin correlations were observed, and the prospect to study entanglement dynamics in the demagnetisation of a cold Fermi gas. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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