Quantum acousto-optic control of light-matter interactions in nanophotonic networks

Abstract

We analyze the coupling of atoms or atom-like emitters to nanophotonic waveguides in the presence of propagating acoustic waves. Specifically, we show that strong index modulations induced by such waves can drastically modify the effective photonic density of states and thereby influence the strength, the directionality, as well as the overall characteristics of photon emission and absorption processes. These effects enable a complete dynamical control of light-matter interactions in waveguide structures, which even in a two dimensional system can be used to efficiently exchange individual photons along selected directions and with a very high fidelity. Such a quantum acousto-optical control provides a versatile tool for various quantum networking applications ranging from the distribution of entanglement via directional emitter-emitter interactions to the routing of individual photonic quantum states via acoustic conveyor belts.

15 pages, 9 figures

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• Harnessing spontaneous emission of correlated photon pairs from ladder-type giant atoms
• Directional emission and photon bunching from a qubit pair in waveguide
• Light-Matter interactions in Hofstadter lattice with the next-nearest neighbor couplings
• Improving quantum state transfer: Correcting non-Markovian and distortion effects
• Emergence of second-order coherence in superfluorescence
• Manipulation of magnetic systems by quantized surface acoustic wave via piezomagnetic effect