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Jaynes–Cummings model breaks down when the cavity geometry significantly reduces free-space emission

Version 2 2024-07-09, 21:44
Version 1 2024-07-09, 21:44
Posted on 2024-07-09 - 21:44
Strong coupling between a single resonator mode and a single quantum emitter is key to a plethora of experiments and applications in quantum science and technology and is commonly described by means of the Jaynes-Cummings model. Here, we show that the Jaynes-Cummings model only applies when the cavity does not significantly change the emitter's decay rate into free-space. Most notably, the predictions made by the Jaynes-Cummings model become increasingly wrong when approaching the ideal emitter-resonator systems with no free-space decay channels. We present a Hamiltonian that provides, within the validity range of the rotating wave approximation, a correct theoretical description that applies to all regimes. As minimizing the coupling to free-space modes is paramount for many cavity-based applications, a correct description of strong light-matter interaction is therefore crucial for developing and optimizing quantum protocols.

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Journal of the Optical Society of America B

AUTHORS (3)

Martin Blaha
Arno Rauschenbeutel
Jürgen Volz

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