Researchers used quantum state tomography to track the evolution of a dissipative superconducting qubit and observed violations of linearity. They revealed a breakdown in linearity for the two-level subspace while demonstrating that linearity is preserved in the full three-level system.
Quantum state tomography reveals a qubit’s broken linearity
Researchers used quantum state tomography to track the evolution of a dissipative superconducting qubit and observed violations of linearity. They revealed a breakdown in linearity for the two-level subspace while demonstrating that linearity is preserved in the full three-level system.