Programme

P.24 -- Poster, NCTP-43

Date: Tuesday, 31 July 2018

Time: 08:30 - 10:00

Joint remote generation of high-dimensional hybrid entanglement

Cao Thi Bich (1), Le Thanh Dat (2), Nguyen Van Hop (3), Nguyen Ba An (1,2)

(1) Center for Theoretical Physics, Institute of Physics, Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam; (2) Thang Long Institute of Mathematics and Applied Sciences (TIMAS), Thang Long University, Nghiem Xuan Yem, Hoang Mai, Hanoi, Vietnam; (3) Physics Department, Hanoi National University of Education, 136 Xuan Thuy, Cau Giay, Hanoi, Vietnam

Entanglement, kind of nonlocal correlation at a distance, is a vital quantum resource without which many useful tasks cannot be performed. In general, generation of entanglement is tricky. Usually, the to-be-entangled parties should be brought together at one place to implement necessary entangling operation before distributing them to remote locations. However, thanks to the so-called entanglement swapping property, parties that have never met can also be made entangled with each other. Here we exploit such property to generate a type of entanglement between a quDit and a spatially separated quNit. Moreover, to enhance the security, the generation scheme requires two remote generators whose role is designed in such a way that either of them alone cannot succeed but both of them working in close cooperation can. Concretely, we propose two schemes for such joint remote generation of the hybrid entanglement by means of four high-dimensional Einstein-Podolsky-Rosen pairs. In one scheme the to-be-entangled parties have to participate actively in the process of entanglement generation, while in the other scheme their participation is just passive. Each scheme suits a specific technological condition and both succeed with unit probability.

Presenter: Le Thanh Dat