Programme

P.74 -- Posters, VCTP-50

Date: Thursday, 7 August 2025

Time: 08:30 - 10:00

ENTANGLEMENT DYNAMICS OF AN ATOM INTERACTING WITH A GENERALIZED PHOTON-ADDED PAIR COHERENT STATE UNDER PHASE DAMPING

Le Thi Hong Thanh1, Truong Minh Duc2

(1) Quang Nam University, 102 Hung Vuong, Tam Ky City, Quang Nam Province, Viet Nam (2) Department of Physics, University of Education, Hue University, Hue City, Viet Nam

In this paper, we investigate the entanglement dynamics of a two-level atom interacting with a field initially prepared in a generalized photon-added pair coherent state under the influence of phase damping. We analyze how entanglement evolves over time and how it is affected by the photon addition numbers and the strength of decoherence. Special emphasis is placed on comparing the behavior of entanglement when the field is in a superposition of a photon-added pair coherent state. Our results show that the superposed states exhibit enhanced entanglement robustness under phase damping, particularly in the early evolution stages. These findings suggest that engineering initial field states through photon addition and quantum superposition can significantly influence entanglement preservation. The results have potential applications in quantum information processing, where maintaining entanglement under noise is essential.

Presenter: Le Thi Hong Thanh