Fermion parity and quasiparticle poisoning
Parity is an important conserved quantity in ideal superconducting islands.
$$\hat P=(-1)^{\hat N}$$
Physical intuition
Parity is an important conserved quantity in ideal superconducting islands.
Deep dive: physical mechanism
Quasiparticle tunneling changes parity and can disrupt hybrid-qubit operations.
What is measured experimentally?
Parity switching rates appear in time-domain charge or microwave readout.
Assumptions, noise and limitations
Finite temperature and nonequilibrium quasiparticles break ideal parity conservation.
Research and simulation exercise
Simulate random telegraph parity switching.
Connect the ideas
Explore the chapter overview, learning path, and references.