Generation of phonon quantum states and quantum correlations among single photon emitters in hexagonal boron nitride
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Date
2024
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Abstract
Hexagonal boron nitride exhibits two types of defects with great potential for quantum information technologies: single-photon emitters (SPEs) and one-dimensional grain boundaries hosting topologically-protected phonons, termed as topologically-protected phonon lines (TPL). Here, by means of a simple effective model and density functional theory calculations, we show that it is possible to use these phonons for the transmission of information. Particularly, a single SPE can be used to induce single-, two- and qubit-phonon states in the one-dimensional channel, and (ii) two distant SPEs can be coupled by the TPL that acts as a waveguide, thus exhibiting strong quantum correlations. We highlight the possibilities offered by this material-built-in nano-architecture as a phononic device for quantum information technologies.
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Keywords
Hexagonal boron nitride (hBN), Single-photon emitters (SPE), Spin-boson interaction, Qubit, Entanglement, Discord, Fock state, Topological protection, Quantum IBM, Master equation
Citation
EPJ Quantum Technology. 2024 Nov 05;11(1):75