https://doi.org/10.1140/epjd/s10053-023-00751-0
Regular Article – Quantum Optics
Quantum beat laser as a source of nonclassical wave–particle complementarity
1
School of Electronic Engineering, Huainan Normal University, 232038, Huainan, People’s Republic of China
2
Glycogene LLC, Precision Medical Industry Base, 430200, Wuhan, People’s Republic of China
Received:
2
June
2023
Accepted:
29
August
2023
Published online:
12
October
2023
Quantum decoherence tends to bring about the quantum-to-classical transition via the system–reservoir interaction, which is the main obstacle to the realization of quantum information processing. We propose a scheme to unconditionally create the quantum light source satisfying the nonclassical wave–particle complementary relation in the framework of the quantum theory of second-order coherence. The scheme uses the efficient and controllable two-mode squeezed vacuum reservoir coupled to the combination modes of interest rather than the original cavity modes in the two-level quantum beat laser. We investigate the complementarity of the generated two-mode squeezed state including the dependencies of the visibility and which-path information on the ratio of detuning and decay rate. The visibility is shown to be larger than unity, different from the vanishing which-path information. The resultant complementary reaches the quantum regime without any classical analogue.
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© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
