Topological quantum circuit based on two-dimensional Weyl-semiconductor-superconductor junction
Abstract
Topological quantum computing (TQC) utilizing the non-Abelian properties of Majorana bound states (MBS) promise a dreamlike scheme of quantum error correction at the hardware level. Apart from the continuous pursuit of a zero-bias peak in the semiconductor-superconductor hybrid systems, the topological materials sandwiched by s-wave superconductors (i.e., topological junction) also possess a non-trivial 4?-periodic supercurrent associated with MBS. In this proposal, we aim to probe this topological phenomenon by designing and characterizing various quantum transport devices and superconducting circuits based on 2D semiconductor-superconductor heterojunction. In particular, a 2D lateral tellurium-based Josephson junction will be tested for the missing n equals 1 Shapiro steps in the a.c. Josephson measurements, while a transmon consists of 2D lateral tellurium junctions and a superconducting cavity, will be tested for its modulation period in flux-tuning. Both approaches can reveal the underlying topological MBS, with the gate tunability of MBS due to the semiconducting nature of 2D tellurium. In line with probing the MBS-related topological phenomenon, we also aim to develop transmon qubit based on topological materials and study its coherence properties, such as Rabi oscillation, T1 and T2 measurements, to compare with the state-of-the-art 2D material-based transmon qubit.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- May 10, 2022
- Source ID
- FA23862114064XX0
Entities
People
- Wenzhuo Wu
Organizations
- Air Force Office of Scientific Research
- Purdue University
- United States Air Force