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Covariance matrices are indispensable for continuous-variable systems, but they do not determine a generic non-Gaussian state. This becomes de...
The short-time commutator expansion tells us how an observable first responds to the quench. It does not, by itself, produce a finite-time tra...
When all first-order cross-covariance rates vanish, it is tempting to call the post-quench state stationary. That inference is false. The surv...
Covariances are useful observables in a non-Gaussian quench, but they do not generally form a closed dynamical system. Here the initial cross-...
The quench studied here changes one term of the Hamiltonian, not the complete magnetic field. An exceptional-Hermite product state is first pr...
The angular quench begins from a state that is known exactly, not from a Gaussian approximation or a numerically optimized ansatz. This articl...
This article fixes the conventions and the static reduction behind our exceptional-Hermite angular-momentum quench. The central point is simpl...
A charged harmonic oscillator in an external magnetic field appears to be a simple quantum-mechanical system, yet it provides a clean setting ...
Shape invariance is one of the central algebraic mechanisms behind exactly solvable quantum potentials in supersymmetric quantum mechanics. In...
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