Pulse-level Programming for Microwave Control & Readout of Superconducting Qubits

• ❑
  Superconducting qubits are commonly operated using microwaves; specifically
  with I-Q modulated microwave pulses. Any gate operations on the qubits are
  actually combinations or sequence of such microwave pulses of proper shape,
  pulse-width and pulse amplitude (power).
• ❑
  In our single qubit system, we have performed single-qubit gates using various
  pulses like square / flat-top, Gaussian, Cosine, flat-top-Gaussian and flat-top
  Cosine pulses using I-Q modulated Single Side-band (SSB) upconverted signals.
• ❑
  Different pulse shapes have different filter properties; proper selection of pulse
  shape is necessary to prevent leakage / noise into the qubit.

Upcoming Work

• •
  Pulse shape optimization of superconducting qubit control and
  readout using FPGA RFSoC with Direct Digital Synthesis (DDS).
• •
  Generating various types of microwave pulse shapes on RFSoC based
  on their filter properties.
• •
  Efficient control of superconducting qubit by optimizing the pulse shapes.
• •
  Fast and weak measurement of qubit with proper pulse shape in the
  Quantum Non-Demolition (QND) regime.
• •
  Comparison of qubit performance (gate and readout fidelities) based
  on control signals generated from I-Q mixers and from RFSoC by DDS.
• •
  Investigating the Noise spectrum of the superconducting qubits based
  on various pulse shapes.