Fidelity of time-bin-entangled multiphoton states from a quantum emitter

We analyze a scheme for generating multiphoton entangled states by a single solid-state quantum emitter and devise a mathematical framework for assessing the fidelity of the generated state. Within this formalism, we theoretically study the role of imperfections present in real systems on the generation of time-bin encoded Greenberger-Horne-Zeilinger and one-dimensional cluster states. We consider both fundamental limitations, such as the effect of phonon-induced dephasing, interaction with the nuclear spin bath, and second-order emissions, as well as technological imperfections, such as branching effects, nonperfect filtering, and photon losses. The devised framework is applicable to a range of quantum emitters, including semiconductor quantum dots, defect centers in solids, and atoms in cavities.

Automated summary

The study analyzes a scheme using a single solid-state quantum emitter to generate multiphoton entangled states and develops a mathematical framework to evaluate the fidelity of the generated state. It theoretically investigates the impact of imperfections on time-bin encoded Greenberger-Horne-Zeilinger and one-dimensional cluster states, covering both fundamental limitations and technological imperfections. The devised framework is applicable to a variety of quantum emitters, including semiconductor quantum dots, defect centers in solids, and atoms in cavities.