1 Answers
A quantum depolarizing channel is a model for quantum noise in quantum systems. The d {\displaystyle d} -dimensional depolarizing channel can be viewed as a completely positive trace-preserving map Δ λ {\displaystyle \Delta _{\lambda }} , depending on one parameter λ {\displaystyle \lambda } , which maps a state ρ {\displaystyle \rho } onto a linear combination of itself and the maximally mixed state,
The condition of complete positivity requires λ {\displaystyle \lambda } to satisfy the bounds
4 views
Answered