Non-Hermitian topology and entanglement in an optomechanical superlattice

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Abstract

The interplay between topology and dissipation can give rise to a wealth of new phenomena and pave the way for novel topological lasers, sensors, and other quantum devices. Along these lines, we propose here an optomechanical setup in which the concomitant presence of a spatially modulated external drive and dissipation gives rise to a topologically nontrivial state for mechanical and optical excitations. We are able to show that the one-dimensional system considered here exhibits topologically protected end states for which mechanical and optical degrees of freedom are entangled. We show such entanglement to be robust with respect to the presence of nonzero-temperature baths and we propose a protocol for experimental observation of the entanglement.

Original languageEnglish
Article number013089
JournalPhysical review research
Volume7
Issue number1
DOIs
Publication statusPublished - Jan 2025
MoE publication typeA1 Journal article-refereed

Funding

W.B. acknowledges support by Narodowe Centrum Nauki (NCN, National Science Centre, Poland) Project No. 2019/34/E/ST3/00404 and partial support by the Foundation for Polish Science through the IRA Programme co-financed by the EU within SG OP and EFSE (Project MagTop No. FENG.02.01-IP.05-0028/23). F.M. thanks Kjetil Barkje and Mika Sillanpa for fruitful discussion. F.M. acknowledges financial support from the Research Council of Norway (Grant No. 333937) through participation in the QuantERA ERA-NET Cofund in Quantum Technologies (project MQSens) implemented within the European Union's Horizon 2020 Programme.

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