Derivation of Maxwell-Bloch-type equations by projection of quantum models

Abstract

A simple algebraic procedure is described for deriving Maxwell-Bloch-type equations from single-atom cavity quantum electrodynamics (cavity QED) master equations via orthogonal projection onto a manifold of semiclassical states. In particular the usual Maxwell-Bloch Equations are obtained--up to a state-dependent correction factor of order unity--straightforwardly from the unconditional Jaynes-Cummings master equation. The technique of projecting onto a semiclassical manifold can also be applied with conditional master equations (quantum filters), leading to stochastic simulation models that include multiplicative noise terms associated with fluctuations of the atomic dipole. The utility of such models is briefly explored in the context of single-atom absorptive bistability.

4 pages, 1 EPS figure

Cited by in corpus (5)

• Cooling and squeezing the fluctuations of a nanomechanical beam by indirect quantum feedback control
• Magnetometry via a double-pass continuous quantum measurement of atomic spin
• Quantum filter reduction for measurement-feedback control via unsupervised manifold learning
• Parameter Estimation, Model Reduction and Quantum Filtering
• Amplified Quantum Dynamics and Enhanced Parameter Sensitivity via Coherent Feedback in Collective Atomic Spin Systems