Quantum system performing quantum channel estimation and method of modelling quantum channel

摘要

In a method of performing quantum channel estimation according to the present invention, the method comprises: a first quantum state transmitting step of allowing a first device, a transmitting device, to transmit a density operator (ρ) to a second device, a receiving device, through a quantum channel which is a time-correlated squeezed generalized amplitude damping (SGAD) channel; a second quantum state receiving step of receiving, from the second device, information on a probability map (Φ(ρ)) received by the second device via the quantum channel; and a quantum channel estimating step of estimating characteristics of the SGAD channel based on the received information on the probability map (Φ(ρ)). According to the present invention, it is possible to qualitatively analyze the effect of channel memory effects on quantum correlation in time-correlated quantum channels with a specific initial state.