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DOI: https://doi.org/10.1088/1367-2630/ac0b02

Funding agency	Grant number
Russian Science Foundation	19-71-10091
Foundation for the Development of Theoretical Physics and Mathematics BASIS	19-1-2-66-1
Ministry of Science and Higher Education of the Russian Federation	0066-2019-0005
IAL and MEK thank Henni Ouerdane, Jacob Biamonte, Stephen Vintskevich, and Emil Davletov for useful discussions. Results of sections 6.2 and 6.3 were obtained by IAL with the support from the Russian Science Foundation Grant No. 19-71-10091. Results of section 7 were obtained by IAL and SNF with the support from the Foundation for the Advancement of Theoretical Physics and Mathematics ‘BASIS’ under Project No. 19-1-2-66-1. Results of section 8.2 were obtained by SNF in Valiev Institute of Physics and Technology of Russian Academy of Sciences, where SNF was supported by Program No. 0066-2019-0005 of the Russian Ministry of Science and Higher Education.

Received: 02.02.2021
Revised: 27.05.2021
Accepted: 14.06.2021

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