Superconducting circuits

Superconducting circuits are one of the most promising platforms for scalable quantum technology. In the last couple of decades, it has undergone significant development and is currently being explored by several large tech companies as the future of quantum computing. The analysis of superconducting circuits usually revolves around making efficient two-level quantum systems, also known as qubits, from circuits consisting of capacitors, linear inductors, and a nonlinear inductor also known as a Josephson junction.1 Microwave platform Presto is ideal for performing measurement and control of superconducting qubits.

Standard qubit characterization
Characterization of qubit 2 with Presto. Gray dots show measurement data; solid lines show fits to theory. (a) Rabi oscillations with a sequence of ten DRAGcompensated control pulses, each with a sine-squared shape and duration 20 ns. The fitted amplitude for a π gate is 51.86% of the DAC full-scale range, or −5.9 dBm. (b) Measurements of energy-relaxation time T 1 and decoherence time T 2 from a Ramsey-echo experiment. (c) Chevron pattern from a series of Ramsey measurements. (d) and (e) Pulsed resonator spectroscopy showing the steady-state resonator response R g/e ( f ) when the qubit is prepared in the ground (blue) and excited (orange) states: (d) amplitude A; (e) phase ϕ. (f) Separation in phase space between the two steady-state responses: S( f ) = |Re( f ) − Rg( f )|. The frequency of maximum separation is the optimal readout frequency.
Challenge: Characterize a transmon qubit and learn Presto API.

Solution: Follow our qubit calibration tutorial.
Qubit calibration tutorial Request Quotation