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arXiv · 1106.1654

Phonitons as a sound-based analogue of cavity quantum electrodynamics

O. O. Soykal·Rusko Ruskov·Charles Tahan
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Abstract

A quantum mechanical superposition of a long-lived, localized phonon and a matter excitation is described. We identify a realization in strained silicon: a low-lying donor transition (P or Li) driven solely by acoustic phonons at wavelengths where high-Q phonon cavities can be built. This phonon-matter resonance is shown to enter the strongly coupled regime where the "vacuum" Rabi frequency exceeds the spontaneous phonon emission into non-cavity modes, phonon leakage from the cavity, and phonon anharmonicity and scattering. We introduce a micropillar distributed Bragg reflector Si/Ge cavity, where Q=10^5-10^6 and mode volumes V<=25*lambda^3 are reachable. These results indicate that single or many-body devices based on these systems are experimentally realizable.

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O. O. Soykal, Rusko Ruskov, Charles Tahan. 2013-02-26. Phonitons as a sound-based analogue of cavity quantum electrodynamics. https://doi.org/10.1103/physrevlett.107.235502

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