Programme

P.6 -- Poster

Date: Friday, 24 November 2017

Time: 10:30 - 11:20

Exact Quantum Darwinism on a Two-Branch Measurement Model

John Paul A. Besagas (1), Eric A. Galapon (1)

(1) Theoretical Physics Group, National Institute of Physics, University of the Philippines, Diliman Quezon City, 1101 Philippines

We consider the extension of the exact decoherence model in EPL, \textbf{113} (2016) 60007 into a two-branch measurement of a finite-dimensional quantum system, which is implemented by two measuring instruments or branches, each being decomposed into a probe or pointer. The two probes are inaccessible and there is no environment in the model. It is found that if one of the two probes are initially prepared in a momentum-limited state, the coherences of the reduced state of the system-pointer in each branch vanish simultaneously and exactly at a finite time. Moreover, under the additional assumption that the initial state of both pointers are momentum-limited, the branch pointer states become exactly orthogonal with generally distinct conditions. The results imply that the decohered system state becomes exactly objective in two branches.

Presenter: John Paul A. Besagas