Phonitons as a sound-based analogue of cavity quantum electrodynamics

Details Phonitons as a sound-based analogue of cavity quantum electrodynamics Phonitons as a sound-based analogue of cavity quantum electrodynamics

2011-06-08

arxiv.org/abs/1106.1654v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Changed "phononitons" to "phoniton" by negotiation with PRL editors, no other changes. The PRL'd version will be uploaded sepa

Scientific paper

The progression of quantum technology relies in part on the identification and control of components, such as confined electrons or photons, from which systems of greater complexity are built. Here we describe another potentially valuable component, a composite object formed as a quantum mechanical superposition of a long-lived, localized phonon and a matter excitation: half-sound, half-matter. We identify a possible realization of such a system in silicon, a donor transition (P or Li) driven solely by acoustic phonons at wavelengths where high-Q acoustic phonon cavities can be realized. We show that this phonon-matter excitation resonance enters the strongly-coupled regime where the "vacuum" Rabi frequency, g, exceeds the spontaneous phonon emission into non-cavity modes, phonon leakage from the cavity, and phonon anharmonicity and scattering. Based on our results, we suggest single or many-body systems and devices worthy of further study.

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