Bulletin of the American Physical Society
APS March Meeting 2024
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session Q48: Superconducting Qubits: Junctions
3:00 PM–5:48 PM,
Wednesday, March 6, 2024
Room: 200E
Sponsoring
Units:
DQI DCMP DMP
Chair: Joshua Mutus
Abstract: Q48.00003 : Hybrid 2D-3D Heterostructures for Merged Element Transmons*
3:24 PM–3:36 PM
Presenter:
John W Lyons
(Carnegie Mellon University)
Authors:
John W Lyons
(Carnegie Mellon University)
Param J Patel
(University of Pittsburgh)
Junwon Choi
(Carnegie Mellon University)
Michael Hatridge
(University of Pittsburgh)
Benjamin M Hunt
(Carnegie Mellon University)
Merged element transmon (MET) designs combine the Josephson junction and large shunting capacitor of a transmon qubit into a single circuit element. We explore a MET design utilizing the 2D insulator hexagonal boron nitride (hBN), which takes advantage of both its large band gap and low-defect crystalline nature to potentially improve qubit quality. Here, we demonstrate that by using flip-stack techniques in addition to traditional dry polymer transfer methods, deposited superconducting metals such as can be integrated into a 2D VdW heterostructure in a way that preserves the properties of clean 2D-3D interfaces throughout the stack. We report transport measurements in these structures, as well as discuss their integration into superconducting quantum circuits.
*NSF-PIRE program, grant #1743717
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