2021/03/23 by Joseph Yuan, Joseph O'Connell Yuan, Kaushini S. Wickramasinghe +6
Computer Science · Physics and Astronomy · #Condensed matter physics #Josephson effect #Materials science #Optoelectronics #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum and electron transport phenomena #Quantum computer #Quantum mechanics #Qubit #Semiconductor #Superconducting quantum computing #Superconductivity #cond-mat.mes-hall #quant-ph
paper · pdf · doi:10.1116/6.0000918
published as Journal of Vacuum Science & Technology A 39, 033407 (2021) · This paper is part of the Special Topic Collection: Honoring Dr. Art Gossard's 85th Birthday and his Leadership in the Science and Technology of Molecular Beam Epitaxy
openalex publication_date 2021/03/23 · arxiv created 2021/03/26 · openalex created_date 2021/03/29 · arxiv updated 2021/04/05 · openalex updated_date 2026/08/05
Qubits on solid state devices could potentially provide the rapid control necessary for developing scalable quantum information processors. Materials innovation and design breakthroughs have increased functionality and coherence of qubits substantially over the past two decades. Here, we show by improving interface between InAs as a semiconductor and Al as a superconductor, one can reliably fabricate voltage-controlled Josephson junction field effect transistor (JJ-FET) that can be used as tunable qubits, resonators, and coupler switches. We find that bandgap engineering is crucial in realizing a two-dimensional electron gas near the surface. In addition, we show how the coupling between the semiconductor layer and the superconducting contacts can affect qubit properties. We present the anharmonicity and coupling strengths from one and two-photon absorption in a quantum two level system fabricated with a JJ-FET.