2D Gapless Topological Superfluids Generated by Pairing Phases

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.

arXiv comment11 pages, 5 figures

References in corpus (42)

• Topological insulators and superconductors
• Fault-tolerant quantum computation by anyons
• Non-Abelian Anyons and Topological Quantum Computation
• Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
• Unpaired Majorana fermions in quantum wires
• Electronic Structure of Pyrochlore Iridates: From Topological Dirac Metal to Mott Insulator
• Weyl and Dirac Semimetals in Three Dimensional Solids
• Quantum information with Rydberg atoms
• A generic new platform for topological quantum computation using semiconductor heterostructures
• Majorana Zero Modes and Topological Quantum Computation
• Proximate Kitaev Quantum Spin Liquid Behaviour in α-RuCl${}_3$
• Majorana Fermions in Equilibrium and Driven Cold Atom Quantum Wires
• Evidence for Majorana bound state in an iron-based superconductor
• Non-Abelian Topological Order in S-Wave Superfluids of Ultracold Fermionic Atoms
• Local Blockade of Rydberg Excitation in an Ultracold Gas
• Three-dimensional Roton-Excitations and Supersolid formation in Rydberg-excited Bose-Einstein Condensates
• Topology of Andreev Bound States with Flat Dispersion
• Strongly correlated gases of Rydberg-dressed atoms: quantum and classical dynamics
• Quantum Computation Using Vortices and Majorana Zero Modes of a $p_x$ + $i{p}_y$ Superfluid of Fermionic Cold Atoms
• Experimental investigations of the dipolar interactions between single Rydberg atoms
• Realization of 2D Spin-orbit Interaction and Exotic Topological Orders in Cold Atoms
• Protected boundary states in gapless topological phases
• Collective many-body interaction in Rydberg dressed atoms
• Coexistence of Magnetism and Superconductivity in the Iron-based Compound Cs_0.8(FeSe_0.98)_2
• Anomalous Andreev bound state in non-centrosymmetric superconductors
• Non-Majorana Origin of the Half-Quantized Conductance Plateau in Quantum Anomalous Hall Insulator and Superconductor Hybrid Structures
• Majorana Fermions in Nodal Superconductors: Gapless Topological Phase
• Interlayer superfluidity in bilayer systems of fermionic polar molecules
• Nodal Structure of Superconductors with Time-Reversal Invariance and Z2 Topological Number
• Topologically stable gapless phases of time-reversal invariant superconductors
• Weyl and Dirac semimetals with Z_2 topological charge
• Bilayer superfluidity of fermionic polar molecules: many body effects
• Superfluidity and dimerization in a multilayered system of fermionic polar molecules
• BCS-BEC Crossover in Bilayers of Cold Fermionic Polar Molecules
• Probing the interaction between Rydberg-dressed atoms through interference
• Rydberg dressing of a one-dimensional Bose-Einstein condensate
• Phases of dipolar bosons in a bilayer geometry
• Parity-violating hybridization in heavy Weyl semimetals
• Collective phenomena in quasi-two-dimensional fermionic polar molecules: band renormalization and excitons
• Fulde-Ferrell-Larkin-Ovchinnikov state in bilayer dipolar systems
• Two-dimensional Paired Topological Superfluids of Rydberg Fermi Gases
• Quantum Degenerate Majorana Surface Zero Modes in Two-Dimensional Space