Programme

P.76 -- Poster, VCTP-44

Date: Thursday, 1 August 2019

Time: 08:30 - 10:00

Generation of entangled states in Kerr-like nonlinear coupler pumped by external fields

Doan Quoc Khoa (1), Luong Thi Tu Oanh (2), Chu Van Lanh (2), Nguyen Thi Dung (3) and Nguyen Van Hoa (3)

(1) Quang Tri Teacher Training College, Dong Ha, Quang Tri, Viet Nam; (2) Vinh University, Nghe An, Viet Nam; (3) Hong Duc University, Thanh Hoa, Viet Nam

The Kerr-like nonlinear coupler including two nonlinear oscillations is investigated when these oscillations pumped by external classical fields, which are assumed to be decomposed into two parts: a coherent part and a randomly fluctuating chaotic component (white noise). By using nonlinear quantum scissors formalism, we can obtain the truncation of optical states that leads to achieve two-qubit states due to the nonlinear properties of oscillators and their interaction. Solving a set of coupled stochastic integro-differential equations involved in the problem with all initial conditions, we achieve analytical formulae for the complex probability amplitudes of finite n-photon states. Analysis of time evolution of the quantum entanglement shows that maximally entangled states can be generated and they change dramatically when the initial conditions are different.

Presenter: Doan Quoc Khoa