Abstract:Phase-sensitiveprobes are essential tools for identifying pairing symmetries in unconventionalsuperconductors. In this talk, I will present ourstudies on Josephson effect of unconventional superconductors. Particularly, Iwill introduce monopole superconductors, a class of topological superconductorswith topology-enforced pairing nodes and discuss designs of Josephson junctionsto distinguish monopole superconductors from other trivial or topologicalsuperconductors such as chiral superconductors. Additionally, I will alsodiscuss multigranular superconducting rings with frustrated Josephsoncouplings, where we demonstrate that rings composed of chiral superconductorscannot spontaneously trap a π-flux. Following our analysis, we propose thatβ-Bi2Pd hosts a pairing, akin to helical equal-spin pairing, based on recentreport of recent experimental observation of half-quantum flux in Little-Parksoscillation measurements. References:[1] JYZ, and Y. Li, Spontaneous flux trapping inmultigranular rings of unconventional superconductors, to be posted soon.[2] G. Frazier, J. Zhang, JYZ, X.Sun, and Y. Li, Designing Phase Sensitive Probes of Monopole SuperconductingOrder, PRResearch, 6, 043189 (2024).[3] Y. Li, and F. D. M. Haldane,Topological Nodal Cooper Pairing in Doped Weyl Metals, PRL, 120, 067003 (2018). Biography:Junyi Zhang (张骏祎), Department of Physicsand Astronomy, Johns Hopkins University Junyi Zhang obtained his Ph.D. from PrincetonUniversity in 2021. He then joined Johns Hopkins University as a postdoctoralresearch fellow at the Institute for Quantum Matter. His research spanstopological and correlated materials, magnetism, and atomic optical physics,with applications in quantum simulation and quantum information.

Abstract:Phase-sensitiveprobes are essential tools for identifying pairing symmetries in unconventionalsuperconductors. In this talk, I will present ourstudies on Josephson effect of unconventional superconductors. Particularly, Iwill introduce monopole superconductors, a class of topological superconductorswith topology-enforced pairing nodes and discuss designs of Josephson junctionsto distinguish monopole superconductors from other trivial or topologicalsuperconductors such as chiral superconductors. Additionally, I will alsodiscuss multigranular superconducting rings with frustrated Josephsoncouplings, where we demonstrate that rings composed of chiral superconductorscannot spontaneously trap a π-flux. Following our analysis, we propose thatβ-Bi2Pd hosts a pairing, akin to helical equal-spin pairing, based on recentreport of recent experimental observation of half-quantum flux in Little-Parksoscillation measurements. References:[1] JYZ, and Y. Li, Spontaneous flux trapping inmultigranular rings of unconventional superconductors, to be posted soon.[2] G. Frazier, J. Zhang, JYZ, X.Sun, and Y. Li, Designing Phase Sensitive Probes of Monopole SuperconductingOrder, PRResearch, 6, 043189 (2024).[3] Y. Li, and F. D. M. Haldane,Topological Nodal Cooper Pairing in Doped Weyl Metals, PRL, 120, 067003 (2018). Biography:Junyi Zhang (张骏祎), Department of Physicsand Astronomy, Johns Hopkins University Junyi Zhang obtained his Ph.D. from PrincetonUniversity in 2021. He then joined Johns Hopkins University as a postdoctoralresearch fellow at the Institute for Quantum Matter. His research spanstopological and correlated materials, magnetism, and atomic optical physics,with applications in quantum simulation and quantum information.

Mini-symposium on the fundamental aspects of quantum statistical mechanics

Quantum Connections Winter School: https://www.quantum-connections.net/

Workshop on Quantum systems with novel spatiotemporal control :https://conferences.koushare.com/wqsnsc

Shubham BhardwajPostdoctor Contact：sbhardwaj@ustc.edu.cnOffice：316Research Interests：Extragalactic transients (supernovae, fast optical transients, gamma-ray bursts, etc.), time-domain astronomy, multi-messenger astronomy, machine learning