Characterizing losses in InAs two-dimensional electron gas-based gatemon qubits
- Resource Type
- Working Paper
- Authors
- Strickland, William M.; Baker, Lukas J.; Lee, Jaewoo; Dindial, Krishna; Elfeky, Bassel Heiba; Strohbeen, Patrick J.; Hatefipour, Mehdi; Yu, Peng; Levy, Ido; Issokson, Jacob; Manucharyan, Vladimir E.; Shabani, Javad
- Source
- Subject
- Quantum Physics
Condensed Matter - Mesoscale and Nanoscale Physics
- Language
The tunnelling of cooper pairs across a Josephson junction (JJ) allow for the nonlinear inductance necessary to construct superconducting qubits, amplifiers, and various other quantum circuits. An alternative approach using hybrid superconductor-semiconductor JJs can enable superconducting qubit architectures with all electric control. Here we present continuous-wave and time-domain characterization of gatemon qubits and coplanar waveguide resonators based on an InAs two-dimensional electron gas. We show that the qubit undergoes a vacuum Rabi splitting with a readout cavity and we drive coherent Rabi oscillations between the qubit ground and first excited states. We measure qubit relaxation times to be $T_1 =$ 100 ns over a 1.5 GHz tunable band. We detail the loss mechanisms present in these materials through a systematic study of the quality factors of coplanar waveguide resonators. While various loss mechanisms are present in III-V gatemon circuits we detail future directions in enhancing the relaxation times of qubit devices on this platform.