Fidelity of quantum states - Wikipedia Fidelity of quantum states In quantum mechanics, notably in quantum information theory, fidelity quantifies the "closeness" between two density matrices It expresses the probability that one state will pass a test to identify as the other
Quantum Fidelity, or, how to compare quantum states While there are many ways to quantify the distinguishability (i e , the degree of similarity) between two quantum states, we will focus here on one quantity of particular interest in Quantum Information theory: the Quantum Fidelity (or the so-called Uhlmann-Jozsa Fidelity)
Quantum State Fidelity | Accuracy, Methods Analysis Quantum state fidelity is a crucial concept in the field of quantum information theory, serving as a measure of the ‘closeness’ or ‘overlap’ between two quantum states
Optimal Trace Distance and Fidelity Estimations for Pure Quantum States In this paper, we develop optimal quantum algorithms that estimate both the trace distance and the (square root) fidelity between pure states to within additive error ε using Θ(1 ε) queries to their state-preparation circuits, quadratically improving the long-standing folklore O(1 ε2)
V Compare Quantum Operation Sensitivity - IOPscience ed is to the state whose production was intended This is a common issue in quantum communications and quantum computing, where one is interested in either generating or sending precisely defined quantum state
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