Topological superfluids in two-dimensional Fermi gas with Rashba spin-orbit coupling
arXiv:2109.04670
Abstract
The realization of spin-orbit coupling (SOC) in ultracold atoms has triggered an intensive exploring of topological superfluids in the degenerate Fermi gases based on mean-field theory, which has not yet been reported in experiments. Here, we demonstrate the topological phase transitions in the system via the numerically exact quantum Monte Carlo method. Without prior assumptions, our unbiased real-space calculation shows that spin-orbit coupling can stabilize an unconventional pairing in the weak SOC regime, in which the Fulde-Ferrell-Larkin-Ovchinnikov pairing coexists with the Bardeen-Cooper-Schrieffer pairing. Furthermore, we use the jumps in the spin polarization at the time-reversal invariant momenta to qualify the topological phase transition, where we find the critical exponent deviated from the mean-field theory. Our results pave the way for the searching of unconventional pairing and topological superfluids with degenerate Fermi gases.
arXiv comment13 pages, 5 figures
References in corpus (39)
- Topological Insulators
- Topological insulators and superconductors
- Weyl and Dirac Semimetals in Three Dimensional Solids
- Weyl Semimetal in a Topological Insulator Multilayer
- Floquet Topological Insulator in Semiconductor Quantum Wells
- Synthetic magnetic fields for ultracold neutral atoms
- Computational complexity and fundamental limitations to fermionic quantum Monte Carlo simulations
- Spin-Orbit Coupled Degenerate Fermi Gases
- Spin-Injection Spectroscopy of a Spin-Orbit Coupled Fermi Gas
- Direct imaging of the coexistence of ferromagnetism and superconductivity at the LaAlO3/SrTiO3 interface
- Topological quantization of the spin Hall effect in two-dimensional paramagnetic semiconductors
- Experimental realization of a long-range antiferromagnet in the Hubbard model with ultracold atoms
- Non-Abelian Topological Order in S-Wave Superfluids of Ultracold Fermionic Atoms
- Spin-Orbit Coupled Spinor Bose-Einstein Condensates
- A Bose-Einstein Condensate in a Uniform Light-induced Vector Potential
- Quantum tri-criticality and phase transitions in spin-orbit coupled Bose-Einstein condensates
- BCS-BEC Crossover and Topological Phase Transition in 3D Spin-Orbit Coupled Degenerate Fermi Gases
- Spin-Orbit Coupled Quantum Gases
- Spin Hall effects for cold atoms in a light induced gauge potential
- A sufficient condition for the absence of the sign problem in the fermionic quantum Monte-Carlo algorithm
- Spin-Orbit Coupled Fermi Gases across a Feshbach Resonance
- Ferromagnetic exchange, spin-orbit coupling and spiral magnetism at the LaAlO_3/SrTiO_3 interface
- Pairing states of a polarized Fermi gas trapped in a one-dimensional optical lattice
- Topological Fulde-Ferrel-Larkin-Ovchinnikov states in Spin-orbit Coupled Fermi Gases
- Topological Superfluids with Finite Momentum Pairing and Majorana Fermions
- Fulde-Ferrell-Larkin-Ovchinnikov superfluidity in one-dimensional optical lattices
- Quantum gas microscopy of an attractive Fermi-Hubbard system
- Density-Matrix Renormalization Group Study of Trapped Imbalanced Fermi Condensates
- Competing magnetic orders in a bilayer Hubbard model with ultracold atoms
- Searching for Majorana Fermions in 2D Spin-orbit Coupled Fermi Superfluids at Finite Temperature
- Supercurrent and dynamical instability of spin-orbit-coupled ultracold Bose gases
- Phase separation in a polarized Fermi gas with spin-orbit coupling
- Strongly Correlated Topological Superconductors and Topological Phase Transitions via Green's Function
- Topological metals and finite-momentum superconductors
- Dynamical topological phases in quenched spin-orbit coupled degenerate Fermi gas
- Fulde-Ferrell-Larkin-Ovchinnikov Phases in Two-dimensional Spin-Orbit Coupled Degenerate Fermi Gases
- Rashba spin-orbit coupling, strong interactions, and the BCS-BEC crossover in the ground state of the two-dimensional Fermi Gas
- Large Chern Number Topological Superfluids in Coupled Layer System
- Fidelity susceptibility and topological phase transition of a two dimensional spin-orbit coupled Fermi superfluid