Tunable Xmon qubit coupler example

[nikosavola]

Implement a new sample chip with two Xmon transmon qubits coupled to each other through a third Xmon qubit (with different parameters) in between-them. The thrid qubit works as a tunable coupler. This should be similar to X. Li, “Tunable Coupler for Realizing a Controlled-Phase Gate with Dynamically Decoupled Regime in a Superconducting Circuit,” Phys. Rev. Appl., vol. 14, no. 2, 2020, doi: 10.1103/PhysRevApplied.14.024070.

Details

• Create new file in the samples directory with similar style to the other scripts therein
• Include two Xmon qubits coupled through a third tunable coupler Xmon
• The two Xmon qubits need coupled resonators that are coupled to a probeline
• All qubits need flux lines
• Cite 10.1103/PhysRevApplied.14.024070 approriately