Edge modes in one-dimensional topological charge conserving spin-triplet superconductors: Exact results from Bethe ansatz
Parameshwar R. Pasnoori, Natan Andrei, P. Azaria
Abstract
The authors consider a one-dimensional charge-conserving spin-triplet superconductor with the superconductivity induced by intrinsic attractive pairing interactions between the electrons. Using Bethe ansatz, they show that the system with open boundary conditions exhibits a topological phase characterized by the existence of zero energy bound states localized at the edges. These bound states give rise to degeneracy in the ground-state structure, which results in the existence of fractionalized \textonequarter{} spins at the edges.
Topics & Concepts
Bethe ansatzPhysicsHamiltonian (control theory)Degeneracy (biology)Condensed matter physicsGround stateSpin (aerodynamics)Quantum mechanicsSuperconductivityCharge (physics)Singlet stateExcited stateMathematicsQuantumBiologyMathematical optimizationBioinformaticsThermodynamicsTopological Materials and PhenomenaPhysics of Superconductivity and MagnetismQuantum many-body systems