Demo: Purcell decay physics

[shoumikdc]

Consider 2 coupled modes a and b, with only a coupled to a transmission line. If we have a large decay rate κ on a, then some of this decay will get 'inherited' by mode b, and we can measure it by fitting a decaying exponential to the time-dynamics of b. In the case of a qubit coupled to a readout resonator, we would call this effect Purcell decay, and so it could be interesting to see what happens in our system.