A Novel Phase Diagram for a Spin-1 System Exhibiting a Haldane Phase

POSTER

Abstract

We provide the phase diagram of a 2-parameter spin-1 chain that has a symmetry-protected topological (SPT) Haldane phase using computational algorithms along with tensor-network tools.

We improve previous results, showing the existence of a new phase and new triple points. New striking features are the triple end of the Haldane phase and the complexity of phases bordering the Haldane phase in proximity—allowing moving to nearby non-SPT phases via small perturbations. These characteristics make the system, which appears in Rydberg excitons, e.g. in Cu2O, a prime candidate for applications.

*The authors are grateful for the internal funding support from the College of Science at Purdue University. S.K. and S.C. would like to acknowledge the support from the Department of Energy, the Office of Science, and the Quantum Science Center (QSC).

Publication: https://arxiv.org/pdf/2406.19372

Presenters

  • Mohamad Mousa

    • Purdue University

Authors

  • Mohamad Mousa

    • Purdue University

  • Birgit B Kaufmann

    • Purdue University

  • Sabre Kais

    • North Carolina State University
    • Purdue University
    • Department of Chemistry, Purdue University, West Lafayette, IN 47907 & Department of Electrical and Computer Engineering, North Carolina State University Raleigh, NC, 2760

  • Shawn Cui

    • Purdue University West Lafayette

  • Ralph Kaufmann

    • Purdue