# The effect of classical driving field on the spectrum of a qubit and entanglement swapping inside dissipative cavities

## TL;DR

This paper investigates how a classical driving field influences the emission spectrum and entanglement dynamics of a qubit in a dissipative cavity, demonstrating its role in prolonging entanglement through swapping.

## Contribution

It introduces the analysis of classical driving fields on qubit spectra and entanglement swapping in dissipative environments, highlighting their beneficial effects.

## Key findings

- Classical driving field modifies the qubit's emission spectrum.
- Driving field prolongs entanglement duration.
- Entanglement swapping is feasible with Bell state measurement.

## Abstract

In this paper, we study the effect of classical driving field on the spontaneous emission spectrum of a qubit embedded in a dissipative cavity. Furthermore, we monitor the entanglement dynamics of the driven qubit with its radiative decay under the action of the classical field. Afterwards, we carry out an investigation on the possibility of entanglement swapping between two such distinct driven qubits. The swapping will be feasible with the aid of a Bell state measurement performing on the photons leaving the cavities. It is demonstrated that the classical driving field has a beneficial effect on the prolonging of the swapped entanglement.