Quantum correlations in the two-photon decay of few-electron ions
A theoretical study of the polarization entanglement of two photons emitted in the decay of metastable ionic states is performed within the framework of density-matrix theory and second-order perturbative approach. Particular attention is paid to relativistic and nondipole effects that become import...
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| Hauptverfasser: | , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
21 March 2011
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| In: |
Physical review. A, Atomic, molecular, and optical physics
Year: 2011, Jahrgang: 83, Heft: 3, Pages: 1-10 |
| ISSN: | 1094-1622 |
| DOI: | 10.1103/PhysRevA.83.032506 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevA.83.032506 Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevA.83.032506 
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| Verfasserangaben: | Filippo Fratini, Malte C. Tichy, Thorsten Jahrsetz, Andreas Buchleitner, Stephan Fritzsche, and Andrey Surzhykov |
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| 520 | |a A theoretical study of the polarization entanglement of two photons emitted in the decay of metastable ionic states is performed within the framework of density-matrix theory and second-order perturbative approach. Particular attention is paid to relativistic and nondipole effects that become important for medium- and high-Z ions. To analyze these effects, the degree of entanglement is evaluated both in the dipole approximation and within rigorous relativistic theory. Detailed calculations are performed for the two-photon 2s1/2→1s1/2 transition in hydrogenlike ions as well as for the 1s1/22s1/21S0→1s21/21S0, 1s1/22s1/23S1→1s21/21S0, and 1s1/22p1/23P0→1s21/21S0 transitions in heliumlike ions. | ||
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