Epitaxial superconductor-semiconductor two-dimensional systems for superconducting quantum circuits
Abstract
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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Mar 23, 2021
- Source ID
- 10.1116/6.0000918
Entities
People
- Javad Shabani
- Joseph Yuan
- Kasra Sardashti
- Kaushini S. Wickramasinghe
- Matthieu C. Dartiailh
- Mehdi Hatefipour
- William M. Strickland
Organizations
- New York University