We started off with a single Transmon qubit coupled to a 3D Aluminum box cavity.
The qubit is driven through the cavity port using microwaves. We performed basic
characterization using QM OPX+ and Octave system. Protocols include: Cavity spectroscopy,
Qubit (two-tone) spectroscopy, Rabi oscillations, Relaxation time (T1-decay),
Ramsey and Hahn Echo spectroscopy, state discrimination, Randomized Benchmarking (RB),
AC Stark shift and Readout Fidelity measurements.

Students were trained to mount and connect the qubit and cryogenic electronics
and operate these measurements.

Additionally:

1. Rabi oscillation in qutrit mode (0–1 and 1–2 states) to study thermal population.

2. Noise characterization using FTNS.

3. Qubit characterization with optimized control pulses.

We are upgrading to a 5-qubit superconducting QPU in a dilution refrigerator.
The processor consists of five flux-tunable transmon qubits with fixed inter-qubit coupling,
connected via individual readout resonators to a common CPW transmission line
in a frequency-multiplexed architecture.

The qubits follow a star topology. Cryogenic electronic components are being installed and wired.

With the 5-qubit system, we plan to:

• Characterize single- and two-qubit gates

• Generate entanglement

• Perform basic two-qubit measurements

• Optimize pulse-level control using filter-designed pulses

• Conduct qubit noise spectroscopy