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 …

Jun 24, 2019 · 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 …

May 27, 2022 · The most common use case of fidelity is between a mixed state and a pure state (the mixed state is the one you have and the pure the one you want). For that you don't need any …

Aug 22, 2024 · 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) …

Aug 28, 2008 · Therefore we provide lower and upper bounds for fidelity and propose schemes to measure them. These experimental schemes require much less effort than the full quantum …

Oct 23, 2015 · == Quantum Fidelity == Fidelity is a popular [ [Distance measures between states|measure of distance]] between [ [density operator]]s. It is not a metric, but has some useful …

Some states do not conform with federal tax law. Please check with your home state to determine if it recognizes the expanded 529 benefits afforded under federal tax law, including distributions for …

There is more information towards the end of the tutorial here but essentially how you do this is you run both circuits on the state_vector simulator and then you can use the function state_fidelity to work …

Sep 5, 2025 · Remember to consider your state of residency when reviewing and updating your wealth plan. Here are 4 key issues regarding your home state that you should consider.

Jul 9, 2023 · As a reminder, Fidelity does not provide tax advice, we recommend speaking to a tax professional to discuss your situation. That being said, if you have any additional questions for us, …