Quantum Process Identification: A Method for Characterizing Non-Markovian Quantum Dynamics

Understand

Established methods for characterizing quantum information processes do not capture non-Markovian (history-dependent) behaviors that occur in real systems.

• These methods model a quantum process as a fixed map on the state space of a predefined system of interest.
• Such a map averages over the system's environment, which may retain some effect of its past interactions with the system and thus have a history-dependent influence on the system.
• Although the theory of non-Markovian quantum dynamics is currently an active area of research, a systematic characterization method based on a general representation of non-Markovian dynamics has been lacking.