Phase Dependent Quantum Phase Diagram of Paired Topological Superfluids of Fermionic Rydberg Atoms Jiapei Zhuang ^{1*}, Ching-Yu Huang^{2}, Daw-Wei Wang^{3,1}^{1}Department of Physics, National Tsing Hua University, Hsinchu, Taiwan^{2}Department of Applied Physics, Tunghai University, Taichung, Taiwan^{3}Physics Division, National Center for Theoretical Sciences, P.O.Box 2-131, Hsinchu, Taiwan* Presenter:Jiapei Zhuang, email:jpzhuangphy@gmail.com In this talk, we will introduce an exotic system, where spin-polarized fermionic atoms are loaded in a bilayer optical lattice. A weak light coupling to the Rydberg excited states is introduced to generate a finite range attractive interaction, which could support both intra-layer p-wave superfluidity as well as the inter-layer s-wave superfluidity in different parameter regimes. We find that the s-wave superfluidity and p-wave superfluidity could co-exist after certain modulation of their relative phases, making an interesting gapless topological superfluid from a paired gapped topological superfluidity. We systematically investigate the ground state energy and quantum phase diagram of such a system, providing the phase-modulation mechanism for the presence of gapless superfluidity.
Keywords: topological superconductors, Topological order, Majorana fermion, Quantum phase transitions, Optical lattice |