Neill Lambert

TL;DR: This work considers the entanglement properties of the quantum phase transition in the single-mode superradiance model, involving the interaction of a boson mode and an ensemble of atoms, and derives an exact expression for the scaled concurrence and the cusplike nonanalyticity of the momentum squeezing.

TL;DR: In contrast to the spatial Bell's inequalities which probe entanglement between spatially separated systems, the Leggett?Garg inequalities test the correlations of a single system measured at different times as mentioned in this paper.

TL;DR: In contrast to the spatial Bell's inequalities, which probe entanglement between spatially-separated systems, the Leggett-Garg inequalities test the correlations of a single system measured at different times as discussed by the authors.

TL;DR: This work introduces two “quantum witnesses” to efficiently verify quantum coherence and dynamics in the time domain, without the expense and burden of non-invasive measurements or full tomographic processes.

TL;DR: In this article, a collective coordinate of the environment is incorporated into the system Hamiltonian to quantify the evolving system-environment correlations, and the resulting equilibrium states deviate markedly from those predicted by standard perturbative techniques and are instead fully characterized by thermal states of the mapped system-collective coordinate Hamiltonian.