Chiral spin-phonon bound states and spin-spin interactions with phononic lattices

• URL: http://arxiv.org/abs/2109.14153v1
• Date: Wed, 29 Sep 2021 02:43:38 GMT
• Title: Chiral spin-phonon bound states and spin-spin interactions with phononic lattices
• Authors: Xing-Liang Dong, Cai-Peng Shen, Shao-Yan Gao, Hong-Rong Li, Hong Gao, Fu-Li Li, and Peng-Bo Li
• Abstract summary: We propose a reliable scheme for coupling spins and phonons in phononic dimer and trimer lattices. We show the formation of chiral spin-phonon bound states and topology-dependent phononic collective radiation. This work provides a promising platform for phonon-based quantum information processing and quantum simulation.
• Score: 1.7164987537199843
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Designing unconventional interactions between single phonons and spins is fascinating for its applications in quantum phononics. Here, we propose a reliable scheme for coupling spins and phonons in phononic dimer and trimer lattices, with the combination of solid-state defects and diamond phononic (optomechanical) crystals. The dimer and trimer lattices used are an array of coupled phononic cavities with spatially modulated hopping rates. We predict a series of unconventional sound-matter interaction phenomena in this hybrid quantum system. In the dimer lattice, we show the formation of chiral spin-phonon bound states and topology-dependent phononic collective radiation. While in the trimer lattice, chiral bound states still exist and the spin relaxation is sublattice-dependent. The chiral bound states existed in both types of lattices are robust to large amount of disorder, which can mediate chiral and robust spin-spin interactions. This work provides a promising platform for phonon-based quantum information processing and quantum simulation.

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