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Different Types of Photon Entanglement from a Constantly Driven Quantum Emitter Inside a Cavity

Title data

Seidelmann, Tim ; Cosacchi, Michael ; Cygorek, Moritz ; Reiter, Doris E. ; Vagov, Alexei ; Axt, Vollrath Martin:
Different Types of Photon Entanglement from a Constantly Driven Quantum Emitter Inside a Cavity.
In: Advanced Quantum Technologies. Vol. 4 (2020) Issue 1 . - pp. 1-14. - No. 2000108.
ISSN 2511-9044
DOI: https://doi.org/10.1002/qute.202000108

Official URL: Volltext

Project information

Project financing: Alexander von Humboldt-Stiftung
Deutsche Forschungsgemeinschaft
Russian Science Foundation under the Project 18-12-00429

Abstract in another language

Bell states are the most prominent maximally entangled photon states. In a typical four-level emitter, like a semiconductor quantum dot, the photon states exhibit only one type of Bell state entanglement. By adding an external driving to the emitter system, also other types of Bell state entanglement are reachable without changing the polarization basis. In this work, it is shown under which conditions the different types of entanglement occur and analytical equations are given to explain these findings. Furthermore, special points are identified, where the concurrence, being a measure for the degree of entanglement, drops to zero, while the coherences between the two-photon states stay strong. Results of this work pave the way to achieve a controlled manipulation of the entanglement type in practical devices.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: entangled quantum states; optical cavities; quantum emitters; quantum entanglement; quantum optics; condensed matter physics (theoretical)
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Theoretical Physics III > Chair Theoretical Physics III - Univ.-Prof. Dr. Martin Axt
Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Theoretical Physics III
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 22 Dec 2020 08:15
Last Modified: 15 Feb 2021 08:09
URI: https://eref.uni-bayreuth.de/id/eprint/61363