Quantum Coherence & Dephasing: Spin-Boson Model

A two-level system (qubit) coupled to a bosonic bath. The Bloch vector (⟨σx⟩, ⟨σy⟩, ⟨σz⟩) evolves under the Lindblad master equation — coherent oscillations decay due to dephasing (T₂) and relaxation (T₁) from the bath.

⟨σx⟩: 0.00 | ⟨σy⟩: 0.00 | ⟨σz⟩: 1.00 | |r|: 1.00

Ω (Larmor freq)2.0

γ₁ (relaxation)0.10

γ_φ (dephasing)0.30

n̄ (bath occ)0.50