Quantification of non-realistic features and applications to quantum information processing

Abstract

Quantum states are not completely described by the classical theory of realism Such quantum non-realistic features provide tools to detect quantum effects and have applications to quantum information processing There is however no scheme for quantifying non-realistic features Here we first define a reference state that can be described by the classical realistic theory A quantum process that changes any states into this reference state is also introduced We then further propose two measures to quantify the non-realistic features of quantum state and quantum process With these two novel quantifiers we show that any pure states and any unitary transformations are the states and the processes of maximal non-realistic features respectively Furthermore we also apply these quantifiers to quantum information processing such as quantifying non-realistic features of quantum channels and evaluating the performance of quantum gates Finally we compare our measures with a quantum coherence quantifier in detail

Date of Award	2016 Aug 8
Original language	English
Supervisor	Che-Ming Li (Supervisor)