| Autor: |
Rafsanjani, S. M. Hashemi, Huber, M., Broadbent, C. J., Eberly, J. H. |
| Rok vydání: |
2012 |
| Předmět: |
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| Zdroj: |
Physical Review A 86, 062303 (2012) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevA.86.062303 |
| Popis: |
We find an algebraic formula for the N-partite concurrence of N qubits in an X-matrix. X- matricies are density matrices whose only non-zero elements are diagonal or anti-diagonal when written in an orthonormal basis. We use our formula to study the dynamics of the N-partite entanglement of N remote qubits in generalized N-party Greenberger-Horne-Zeilinger (GHZ) states. We study the case when each qubit interacts with a partner harmonic oscillator. It is shown that only one type of GHZ state is prone to entanglement sudden death; for the rest, N-partite entanglement dies out momentarily. Algebraic formulas for the entanglement dynamics are given in both cases. |
| Databáze: |
arXiv |
| Externí odkaz: |
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