Week 160: Quantum Channels

Learning Objectives

• •Define CPTP maps and explain why both properties are physical requirements
• •Construct Kraus operator representations for given channels
• •Derive Kraus operators from system-environment models
• •Compute the effect of depolarizing, amplitude damping, and phase damping channels
• •Construct the Choi matrix for a channel and use it to verify complete positivity
• •Transform between Kraus and Choi representations