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| 100 | 1 | _ | |a Sauer, A |0 P:(DE-HGF)0 |b 0 |
| 245 | _ | _ | |a Entanglement in bipartite quantum systems: Euclidean volume ratios and detectability by Bell inequalities |
| 260 | _ | _ | |a Bristol |c 2021 |b IOP Publ. |
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| 520 | _ | _ | |a Euclidean volume ratios between quantum states with positive partial transpose and all quantum states in bipartite systems are investigated. These ratios allow a quantitative exploration of the typicality of entanglement and of its detectability by Bell inequalities. For this purpose a new numerical approach is developed. It is based on the Peres–Horodecki criterion, on a characterization of the convex set of quantum states by inequalities resulting from Newton identities and from Descartes' rule of signs, and on a numerical approach involving the multiphase Monte Carlo method and the hit-and-run algorithm. This approach confirms not only recent analytical and numerical results on two-qubit, qubit-qutrit, and qubit-four-level qudit states but also allows for a numerically reliable numerical treatment of so far unexplored qutrit–qutrit states. Based on this numerical approach with the help of the Clauser–Horne–Shimony–Holt inequality and the Collins–Gisin inequality the degree of detectability of entanglement is investigated for two-qubit quantum states. It is investigated quantitatively to which extent a combined test of both Bell inequalities can increase the detectability of entanglement beyond what is achievable by each of these inequalities separately. |
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| 700 | 1 | _ | |a Bernád, J. Z. |0 P:(DE-Juel1)185926 |b 1 |e Corresponding author |u fzj |
| 700 | 1 | _ | |a Moreno, H. J. |0 P:(DE-HGF)0 |b 2 |
| 700 | 1 | _ | |a Alber, G. |0 P:(DE-HGF)0 |b 3 |
| 773 | _ | _ | |a 10.1088/1751-8121/ac3469 |g Vol. 54, no. 49, p. 495302 - |0 PERI:(DE-600)1363010-6 |n 49 |p 495302 - |t Journal of physics / A |v 54 |y 2021 |x 0022-3689 |
| 856 | 4 | _ | |u https://juser.fz-juelich.de/record/904591/files/Sauer_2021_J._Phys._A%20_Math._Theor._54_495302.pdf |
| 856 | 4 | _ | |y OpenAccess |u https://juser.fz-juelich.de/record/904591/files/2102.00312.pdf |
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