Programme

P.15 -- Posters, VCTP-51

Date: Tuesday, 4 August 2026

Time: 09:30 - 10:30

Enhancement of two-mode sum squeezing and quantum entanglement through two-photon addition and two-photon subtraction in Pair coherent states

Ho Sy Chuong (1), Le Minh Triet (1), Nguyen Thi Thu Thuy (1)

(1) Dong Nai University, 09 Le Quy Don, Tam Hiep, Dong Nai City

This work investigates the nonclassicality of the two-photon-added and two-photon-subtracted pair coherent state (TPA-TPS-PCS) through Hillery's two-mode sum squeezing and entanglement criteria. Our results show that TPA-TPS-PCS exhibits two-mode sum squeezing, whereas the original pair coherent state (PCS) does not. The degree of squeezing is enhanced with increasing degeneracy parameter (q). Furthermore, TPA-TPS-PCS displays stronger entanglement than PCS, with both the depth and the region of entanglement increasing for larger values of (q). These findings demonstrate that two-photon addition and two-photon subtraction can significantly enhance the nonclassicality of PCS by generating two-mode sum squeezing and strengthening entanglement resources in two-mode optical systems.

Presenter: Ho Sy Chuong