Quantum computing framework for writing programs and applications
Qiskit is an open-source software development kit (SDK) for working with quantum computers at the level of circuits, pulses, and algorithms.
Questions tagged [qiskit]
237 questions
3
votes
1 answer
Install qiskit on MacOS HighSierra Error: No such file or directory: 'qiskit.egg-info'
I was trying to install QISKit via the pip method as mentioned on their webpage.
However, after many trials, this method doesn't seem to work and I am getting the following error on the terminal.
Compiling QISKit C++ Simulator
creating out
…
Parth Jatakia
- 85
- 6
2
votes
0 answers
'RecursionError: maximum recursion depth exceeded' when training with QuantumKernelTrainer inside a QisKit IBM Runtime Session
I am encountering a RecursionError when using the QuantumKernelTrainer class during the fitting process of a TrainableFidelityQuantumKernel object from the qiskit_machine_learning package within a Qiskit IBM Runtime session. To train the classifier…
Rober
- 21
- 2
2
votes
1 answer
Where is Qiskit's RepetitionCode class now?
Now that Qiskit's ignis module has been deprecated, where does qiskit.ignis.verification.topological_codes.RepetitionCode or its equivalent reside now?
bisarch
- 1,388
- 15
- 31
2
votes
3 answers
PyCharm does not show Qiskit vizualization
I cannot get a histogram from Qiskit to show using PyCharm, even though I am getting the numbers correctly. Code is the following:
import numpy as np
from qiskit import QuantumCircuit, transpile
from qiskit.providers.aer import QasmSimulator
from…
82Hrh
- 23
- 6
2
votes
1 answer
Qiskit: 'no counts for experiment'
Although I imported plot_histogram, I am not getting the output as expected. Here is my code:
a = QuantumCircuit(1)
a.z(0)
a.x(0)
a.h(0)
a.sdg(0)
a.t(0)
backend = Aer.get_backend('qasm_simulator')
result = execute(a, backend).result()
counts =…
Vish
- 35
- 4
2
votes
1 answer
Ruling out state |000> with a 3 qbits circuit executed on a real backend - statevector seems inconsistent
I am trying to rule out the state |000> for a simple 3 qbits quantum circuit executed on a real quantum backend.
The code exctract below is unelegant but I guess it does the trick and for the time being the value |000> hasn't come up. Still I don't…
BCayzac
- 21
- 2
2
votes
1 answer
How do you change the backend.run() command?
This is code from Chapter 6.1 of the qiskit textbook, which shows a job being run. How would you change the first line of the backend.run() command, the schedules parameter, in order to use it for a measurement for a constant pulse shape. The…
Brian Lynch
2
votes
1 answer
Why do I get an import error when importing Qiskit?
Whenever I import qiskit, I get the following error. Anyone know why?
ImportError: dlopen(/opt/anaconda3/lib/python3.8/site-packages/tweedledum/_tweedledum.cpython-38-darwin.so, 2): Symbol not found: _aligned_alloc
Referenced from:…
A. Fattal
- 77
- 3
2
votes
1 answer
qiskit VQC with Amplitude Encoding for state preparation
I am trying to implement a Quantum Neural Network in qiskit, using the VQC class.
The problem is that each data consists in 190 features, which just can't be encoded with the default VQC's function (ZZfeatureMap), since this would mean create a…
Fred Derf
- 45
- 5
2
votes
1 answer
Qiskit Nature VQE print full quantum circuit
I am doing VQE using Qiskit Nature. I want to see how my final quantum circuit looks like. How to print the whole quantum circuit (like an ansatz)?
Farida
- 21
- 2
2
votes
1 answer
How is data encoded in an oracle on a quantum circuit?
I'm specifically looking at implementing Durr, Hoyer, A Quantum Algorithm for Finding the Minimum in qiskit, finding the index with the smallest value in a list using grover's algorithm.
Say you have a list L, [1, 4, 0, 2] for example, and an oracle…
phildo
- 21
- 1
2
votes
2 answers
QISKIT error - numpy.ndarray size changed, may indicate binary incompatibility. Expected 88 from C header, got 80 from PyObject
I ran this
from qiskit import QuantumCircuit, execute, Aer
from qiskit.visualization import plot_histogram
and got the below error
---------------------------------------------------------------------------
ValueError …
X10nD
- 21,638
- 45
- 111
- 152
2
votes
0 answers
The Tutorials in Qiskit: Option Pricing with qGANs
# Set upper and lower data values
bounds = np.array([0.,7.])
# Set number of qubits used in the uncertainty model
num_qubits = [3]
# Set entangler map
entangler_map = []
for i in range(sum(num_qubits)):
entangler_map.append([i, int(np.mod(i+1,…
LOGA
- 21
- 1
2
votes
1 answer
Unexpected keyword argument 'datatime' qiskit provider
I'm trying to set datatime calling backend.properties qiskit.
this is my code :
from qiskit import *
from qiskit.providers.ibmq import *
provider = IBMQ.get_provider(hub='ibm-q')
provider.backends(simulator=False)
backend =…
2
votes
3 answers
Implement quantum teleportation in qiskit
I am trying to implement the quantum teleportation protocol from the qiskit textbook in qiskit:
I start with q_0 bit = 1 and I expect that q_3 = 1 at the end but it does not work.
from qiskit import *
qc = QuantumCircuit(3, 3)
qc.x(0) #q ->…
Felix Ha
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