https://doi.org/10.1140/epjp/s13360-026-07723-4
Regular Article
Dissipation-enhanced global photon blockade in a nonlinear dual-cavity system
1
Department of Physics, College of Science, Yanbian University, 133002, Yanji, Jilin, China
2
Institute of Quantum Science and Technology, Yanbian University, 133002, Yanji, Jilin, China
a
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Received:
12
January
2026
Accepted:
19
April
2026
Published online:
3
May
2026
Abstract
We propose a novel mechanism for achieving a strong global photon blockade (PB) in a nonlinear dual-cavity system mediated solely by dissipative coupling. The two nonlinear cavities are indirectly coupled through a common waveguide that serves as a dissipative channel. Driving only cavity a induces a pronounced single-photon blockade in the other. Our analytical and numerical analysis reveal that, under optimal conditions, the scheme simultaneously fulfills the criteria for both conventional and unconventional photon blockade mechanisms, leading to a superior global PB effect. The equal-time second-order correlation function of the undriven cavity can be suppressed to values as low as 
, indicating the generation of a high-purity single-photon state with significant brightness. This work establishes engineered dissipation not as a detrimental factor but as a powerful resource for quantum state engineering, opening new avenues for on-chip single-photon sources in quantum information processing.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2026
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.
