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Toy models for gravitational and scalar QED decoherence
We investigate the dynamics of two quantum mechanical oscillator system-bath
toy models obtained by dimensionally truncating linearized gravity coupled to a
massive scalar field and scalar QED. The scalar-gravity toy model maps onto the
phase damped oscillator, while the scalar QED toy model approximately maps onto
an oscillator system subject to two-photon damping. The toy models provide
potentially useful insights into solving for open system quantum dynamics
relevant to the full scalar QED and weak gravitational field systems, in
particular the decoherence of initial scalar field system superposition states
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