Measurement Parameters
γ = 0: No measurement (unitary evolution)
γ = small: Weak monitoring
γ = large: Strong measurement (rapid collapse)
System Hamiltonian
Display Options
About Continuous Monitoring
Unlike projective measurement, weak continuous measurement extracts partial information while allowing the quantum state to evolve.
Each trajectory shows a single realization of the stochastic evolution driven by measurement backaction. The measurement record r(t) contains information about the system, and the conditioned state |ψ(t)⟩ evolves according to a stochastic Schrödinger equation.
The ensemble average over many trajectories recovers the standard master equation evolution, showing how quantum measurements "unravel" decoherence into individual stochastic paths.