All Questions
Tagged with quantum-gate noise
8 questions with no upvoted or accepted answers
3
votes
1
answer
239
views
What are the possible gates that I can use to vary input states before CNOT?
We know that the noise of the $\text{CNOT}$ gate varies depending on the input state before it.
What are the gates that I can put in the place of the 4 identity gates above to change the input state ...
- 79
3
votes
0
answers
165
views
Why are two qubits gates more noisy?
I would like to understand why two qubit gates are generally more noisy.
If I am interested in single qubit gates, I can have an effective modelling as a master equation:
$$\dot{\rho}=\frac{1}{i \...
- 1,952
2
votes
0
answers
48
views
Exploiting virtual-$Z_{\theta}$ corrections in QEC
The work done by IBM Researchers to perform virtual-$Z_{\theta}$ gates allowed them to:
achieving zero-time relative phase shifts;
correcting $Z_{\phi}$ errors occurring when applying some gates -- e....
- 2,058
2
votes
0
answers
105
views
Qubit Resource Estimates for 2D Ising Model
I recently came across this paper where the 1d Transverse Field Ising Model (TFIM) with $n$ spins was simulated on a quantum computer. The estimated resources were $n^2$ for the number of gates and ...
- 121
2
votes
0
answers
227
views
Iterative Phase Estimation with noise vs standard Quantum Phase Estimation with noise
I am doing Qiskit Lab 4 about Iterative Phase Estimation. I created a circuit implementing IPE for theta = 1/3 (phase of 2pi/3). Here's the circuit:
It seems to do okay if I run it without noise in a ...
2
votes
2
answers
120
views
What are efficient methods for measuring gate noise?
In this question I'm concerned with getting detailed spectral information about analog noise in quantum gates.
Assume we have imperfect control over transitions between $\vert 0\rangle$ and $\vert 1\...
- 537
1
vote
0
answers
341
views
Is there a way to implement a noisy CNOT gate using CUGate in Qiskit
Wondering if there's a way to implement the noisy version of CNOT (or CX) gate via CUGate using qiskit library for a given fidelity p?
- 79
1
vote
0
answers
50
views
There seems to be a bias against states with more 1s, in IBM's calibration matrix generator: What are the consequences and possible solutions?
Qiskit's function CompleteMeasFitter builds a calibration matrix in this way (2 qubit case):
Everything is initialized in the state $|00\rangle$, which is the ...
