Tag: fidelity

17 Purpose of using Fidelity in Randomised Benchmarking 2018-03-16T01:10:30.233

13 What is the longest time a qubit has survived with 0.9999 fidelity? 2018-04-12T19:23:47.013

13 Can we combine the square roots inside the definition of the fidelity? 2020-02-18T02:10:08.980

9 How can I calculate the inner product of two quantum registers of different sizes? 2018-08-07T12:44:33.587

9 Does higher channel fidelity imply higher entanglement fidelity? 2019-12-20T16:28:54.260

8 On the distribution of the fidelity of a random product state with an arbitrary many-qubit state 2019-11-17T13:59:24.003

8 What is the difference between the "Fubini-Study distances" $\arccos|\langle\psi|\phi\rangle|$ and $\sqrt{1-|\langle\psi|\phi\rangle|}$? 2020-01-24T13:20:46.447

7 How to calculate the fidelity of a certain gate of a IBMQ device in Qiskit using randomized benchmarking/tomography? 2019-06-04T17:50:28.553

6 Quantum circuit for computing fidelity 2019-05-02T06:01:38.453

6 Are there disadvantages in using the inner product between states instead of the fidelity? 2019-05-14T19:49:26.803

6 What does fidelity mean? 2019-07-11T12:29:41.913

6 What are the "nice" properties of the diamond norm and why is it used? 2019-12-27T16:30:54.167

5 Intuitive role of the polar decomposition in proof of Uhlmann's theorem for fidelity 2018-11-09T10:55:09.557

5 Closeness of purifications of states 2020-11-21T16:15:59.580

4 Do avoided crossings / CTs /ZEFOZs optimize quantum fidelity in practice? 2018-05-12T17:34:38.400

4 How to find the fidelity between two state when one is an operator? 2018-06-01T17:06:43.663

4 What would be an ideal fidelity measure to determine the closeness between two non unitary matrices? 2019-07-21T09:40:25.070

4 Is the quantum state fidelity defined as $F(\rho, \sigma)=\text{tr}\sqrt{\rho^{1/2}\sigma\rho^{1/2}}$ or its square? 2020-04-13T15:30:02.260

4 What is a difference between error rates and qubit/gate fidelity? 2020-06-09T22:19:25.047

4 Definition of quantum min-relative entropy 2020-07-16T23:07:15.210

4 What does quantum gate fidelity mean? 2020-08-06T17:52:07.113

4 What is the intuition behind Bures and angle metrics? 2020-08-16T17:12:35.913

4 How to Aggregate Multiple Gate Fidelities 2020-12-22T22:40:40.763

4 Is un-computing $U$ a good proxy for circuit fidelity? 2021-01-23T00:35:08.757

4 How to calculate the average fidelity of an amplitude damping channel 2021-02-16T17:28:47.417

3 Is there any way we get the state vector/density matrix of a noisy simulation in qiskit? 2020-08-26T11:57:57.570

3 The proof of monotonicity of fidelity for channels and its meaning 2020-10-08T07:08:35.167

3 Fidelity of extensions of states 2020-12-02T17:02:35.220

3 How is the connection between Bures fidelity and quantum Fisher information derived? 2021-01-31T11:56:16.570

3 How to limit the error probability in large scale quantum computers 2021-02-14T18:10:14.250

2 Proving the inequality $|\mathrm{tr}(AU)|\le \mathrm{tr}|A|$ in Uhlmann's theorem 2019-05-13T19:48:26.997

2 Which of the Jozsa axioms does the Hilbert-Schmidt inner product violate? 2020-02-18T01:53:27.170

2 How to calculate state fidelity in Qiskit? 2020-03-17T19:23:24.997

2 Fidelity With Bell State Calculation 2020-04-13T19:03:16.830

2 What can be said about the closeness of two states if the difference of their fidelity measured with respect to a fixed state is close to 0? 2020-06-18T06:59:53.357

2 Saturating the Fuchs-van de Graaf inequality 2020-06-25T17:12:56.417

2 Non-ideal bit commitment and coin tossing 2020-11-01T13:54:02.547

2 Non-ideal coin tossing 2020-11-02T22:32:18.027

2 Properties of composition of isometry and a perturbed adjoint 2020-11-11T12:40:55.193

2 In Uhlmann's theorem, should the polar decomposition be written as $A=|A|V$ or $A=V|A|$? 2020-11-28T13:34:26.287

1 Can I compute the fidelity between two states without having to diagonalise them? 2020-02-03T15:41:22.440

1 How can I find the fidelity of preparation? 2020-02-27T01:39:14.640

1 Why does the state fidelity satisfy $\operatorname{tr}|\sqrt{\rho}\sqrt{\sigma}|=\operatorname{tr}\sqrt{\sigma^{1/2}\rho\sigma^{1/2}}$? 2020-05-20T13:52:08.087

1 Can the fidelity $F(\rho,\sigma)$ be computed knowing only $\rho - \sigma$? 2020-07-03T02:06:30.460

1 What can be inferred about the closeness of reduced qubit states from the closeness of the bipartite quantum state? 2020-07-13T05:50:02.953

1 Calculating fidelity for mixed states: are there tricks or it is "brute force" calculations? 2020-08-15T10:29:20.660

1 Given $\rho,\sigma$ such that $F(\rho,\sigma)=0$, what can we say about $F(\text{Tr}_A(\rho),\text{Tr}_B(\sigma))$? 2020-08-23T22:26:17.623

1 Simulate a quantum channel with a certain fidelity 2021-01-05T23:17:02.097

0 Is phase factor negligible in fidelity of quantum states? 2019-07-29T01:34:53.587

0 Joint Concavity of (Root) Fidelity 2020-05-12T09:29:49.407

0 How do I compute the fidelity on the IBM Q using qiskit without the statevector simulator? 2020-09-08T12:51:52.603

0 What is the relation between fidelity and concurrence for a two qubit maximally mixed state? 2021-01-27T15:31:45.023