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What does the function state_fidelity() do in Qiskit?


What does the function state_fidelity() do in Qiskit?

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What does the function state_fidelity() do in Qiskit?
Tag : development , By : chad
Date : January 12 2021, 09:11 PM

Does that help State fidelity is the measure of how close two quantum states are to eachother (wikipedia). So what the last line of the code is trying to do is to see how close the resulting state is to the state '0110'. A fidelity of 1.0 means the states are exactly the same, so the variable named state in the code is a state vector that corresponds to the state '0110'.
The exact definitions can be seen from the wikipedia page, or the code for the function.

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Install qiskit on MacOS HighSierra Error: No such file or directory: 'qiskit.egg-info'


Tag : python , By : user165871
Date : March 29 2020, 07:55 AM
With these it helps I was trying to install QISKit via the pip method as mentioned on their webpage. , You can try to install cmake.
pip install cmake

Qiskit NameError: name 'q0' is not defined


Tag : python-3.x , By : new Blackberry devel
Date : March 29 2020, 07:55 AM
I wish this helpful for you It gives you error about q0 because this is the first unknown variable that it encounters. Then it dies.
There is improper flow in your program. You try to define the variable list:
from qiskit import *
from qiskit.tools.visualization import *

def ccz(qci, q0, q1, q2):
    qci.h(q2)
    qci.ccx(q0, q1, q2)
    qci.h(q2)


def grover(qci, q0, q1, q2):
    ccz(qci, q0, q1, q2)
    for i in [q0, q1, q2]:
        qci.h(i)
        qci.x(i)
    ccz(qci, q0, q1, q2)
    for i in [q0, q1, q2]:
        qci.x(i)
        qci.h(i)

bn = 3
q = QuantumRegister(bn)
c = ClassicalRegister(bn)
qc = QuantumCircuit(q, c)
for i in range(bn):
    qc.h(q[i])
grover(qc, q[0], q[1], q[2])
for i in range(bn):
    qc.measure(q[bn - i - 1], c[i])
r = execute(qc, "local_qasm_simulator").result()
rc = r.get_counts()
print(rc)
plot_histogram(rc)

No module named 'qiskit'


Tag : python , By : LucaN
Date : March 29 2020, 07:55 AM
wish of those help , You need to install it via
pip install qiskit

How to call EnergyInput() function in Qiskit python?


Tag : python , By : John Studdert
Date : March 29 2020, 07:55 AM
it should still fix some issue Have a look at this tutorial about creating QSVMs. Instead of EnergyInput() they use a class called ClassificationInput() to which they pass their data.
This makes the overall expression: algo_input = ClassificationInput(training_input, test_input, datapoints[0])

Cannot import Aer from Qiskit 0.7


Tag : python , By : Eugenio
Date : March 29 2020, 07:55 AM
I wish did fix the issue. I had the same problem. I looked at the repository on GitHub of qiskit terra (https://github.com/Qiskit/qiskit-terra) and in the examples they use BasicAer. So, I figure that they renamed to module.
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