Quantum Process Capability

Chung-Cheng Kuo¹, Shih-Hsuan Chen^1*, Wei-Ting Lee¹, Hung-Ming Chen¹, He Lu², Che-Ming Li¹

¹Department of Engineering Science, National Cheng Kung University, Tainan 701, Taiwan
²Department of Physics, Shandong University, Jinan 250100, China

* Presenter:Shih-Hsuan Chen, email:terry56442000@gmail.com

Physical processes in the quantum regime possess non-classical properties of quantum mechanics. However, methods for quantitatively identifying such processes are still lacking. This study presents a framework for characterizing and quantifying the ability of processes to cause quantum-mechanical effects on physical systems. First, we introduce a new concept, quantum process capability, to evaluate the effects of an experimental process upon a prescribed quantum specification. Various methods are then introduced for measuring such a capability. The methods are experimentally applicable to all physical processes that can be described using the general theory of quantum operations. The utility of the proposed framework is demonstrated through practical examples, including the non-classical manipulation of systems, the generation of entanglement, the creation or preservation of coherence, and the superposition of quantum states. The proposed formalism provides a novel approach for the identification of dynamical processes in quantum mechanics and facilitates the general classification of quantum-information processing.

Keywords: quantum process, quantum-information processing, quantum entanglement, quantum coherence, quantum superposition