Improving the similarity between photon-atom quantum state and its coherent state by a coherent superposition added-subtracted photon

Title : Improving the similarity between photon-atom quantum state and its coherent state by a coherent superposition added-subtracted photon

Abstract:

The spontaneous interaction (emission or absorption) of a photon by atom is theoretically described in two-dimensional by a state vector |ψ⟩. As an initial solution to the problem, we derive its corresponding coherent state. We analytically find the fidelity between photon-atom eigenstate and its coherent state. We introduce the state of a photon-subtraction, photon-addition and we compute the fidelity of a superposition of pair charge coherent states with the state of photon added-subtracted. We show that the quantum teleportation by creating or annihilating an excitement in the coherent states enhances enormously fidelity, also we schow that by increasing the photon quantity, the coherent state becomes less similar to the eignenstate. This means is reversed by increasing time; the system evolves towards an improved correspondence between the initial superposition coherent state and the state after photon addition-subtraction.

Keywords: Photon-atom system, Fidelity, Coherent state, Superposition pair charge coherent states, addition-subtraction Photon state.

Biography:

Dr. Ahlem Abidi, studied Physics at Tunis El Manar University, Tunisia, and graduated as Ms of Quantum Physics in 2014.  She then joined the Research Unit of Nuclear and High Energy Physics of Prof. Adel Trabelsi at the Faculty of Sciences of Tunis, University of Tunis El Manar, in collaboration with the University of Tunis, National School of Engineers of Tunis in 2017. She has received her PhD degree in 2022 at the National School of Engineers of Tunis. She joined the American Journal of Physics and Applications as a reviewer between December 2021 and December 2023, in parallel,  a temporary assistant at the University of Jendouba, Higher Institute of Biotechnology of Beja between January, 2022 and 2023. She has awarded to Women Researcher Award at 6^th Edition of Internationnal Research awards on Quantum Physics and Quantum technologies in august 2023. Currently, she is an assistant professor at Higher Institute of Technological Studies of Jendouba and member Editor at American Journal of Physics and Applications. She has published 13, between research articles and conference papers, in the fields of: theoretical quantum Physics, quantum information and mathematical Physics.