2020/06/30 by Jared Bland, Chris H. Greene, Birgit Wehefritz–Kaufmann +1
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Dirac fermion #Fermion #Ground state #Lattice (music) #Limit (mathematics) #MAJORANA #Majorana equation #Observability #Observable #Parity (physics) #Physics #Quantum #Quantum many-body systems #Quantum mechanics #Quasiparticle #Superconductivity #Topological Materials and Phenomena #Ultracold atom #physics.atom-ph #quant-ph
paper · pdf · doi:10.1103/physreva.103.023310
published as Phys. Rev. A 103, 023310 (2021) · 5 pages 6 figures
arxiv created 2020/10/21 · openalex publication_date 2021/02/08 · arxiv updated 2021/02/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
We propose experimentally observable signatures of topological Majorana quasiparticles in the few-body limit of the interacting cold-atom model of Iemini et al. [F. Iemini, L. Mazza, L. Fallani, P. Zoller, R. Fazio, and M. Dalmonte, Phys. Rev. Lett. 118, 200404 (2017)]. In this limit, the total on-site density and single-body correlations change smoothly with the model parameters, while the calculated mutual information of opposite ends of the lattice indicates a sharp transition of the system to a topological ground state. Furthermore, local-density and -parity measurements provide an experimentally viable path for observing the ground-state Majorana quasiparticles in ultracold atoms. Our results lay out a promising future for utilizing few-body systems as a testing ground for Majorana physics.