2D gapless topological superfluids generated by pairing phases. (12th October 2022)

• Record Type: Journal Article
• Authors: Zhuang, Jiapei; Huang, Ching-Yu; Chang, Po-Yao; Wang, Daw-Wei
• Is Part Of: Journal of physics. Volume 34:Number 41(2022)
• Publication Date: 2022-10-12
• Subjects: cold atom -- topological superfluids -- Rydberg atom -- Majorana zero modes; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/1361-648X/ac8465
• Languages: English
• ISSNs: 0953-8984

Abstract

Abstract: We systematically investigate the ground state phase diagram and the finite temperature phase transitions for a Rydberg-dressed Fermi gas loaded in a bilayer optical lattice. When an effective finite-ranged attraction is induced, our self-consistent mean-field calculation shows that the gapped topological ( p -wave) superfluids in each layer are coupled together by the s -wave pairing in an intermediate inter-layer distance with a spontaneously modulated phases between these two order parameters. The obtained ground state is a gapless topological superfluid with quantized topological charges characterizing the gapless points, leading to a zero energy flat band at the edges. Finally, we calculate the finite temperature phase diagrams of this two-dimensional gapless superfluid and observe two distinct critical temperatures, demonstrating the fruitful many-body effects on a paired topological superfluids.