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
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How to get the Qiskit textbook widgets working?
For example, when trying to run
from qiskit_textbook.widgets import gate_demo
gate_demo(gates='pauli')
in Jupyter notebook or a script, the output I get is
HBox(children=(Button(description='X', layout=Layout(height='3em'), style=ButtonStyle()),…
Calle
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1 answer
using third part modules in IBM quantum experience (Tensorflow)
Is there any option to use Tensorflow in IBM quantum experience? I have searched on google but I couldn't find anything. I thought about copying the source code, any suggestion?
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1 answer
Timeout when trying to install Qiskit on macOS
I am trying to install Qiskit 0.20.0 on my machine running macOS and seeing the below error
pip install qiskit
Collecting qiskit
Using cached qiskit-0.20.0.tar.gz (4.0 kB)
Collecting qiskit-terra==0.15.1
Downloading…
Vidyasagar Machupalli
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In quantum teleportation, should the X gate be before Z gate? Possible error on diagram on QisKit website
I was reading this page about Quantum Teleportation :-
https://qiskit.org/textbook/ch-algorithms/defining-quantum-circuits.html
Following this quantum circuit diagram, I calculated the quantum states (from left to right as it process thru the…
Hum YW
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2 answers
Qiskit Portfolio Optimization Application
I recently got flung into the world of quantum computing and I'm a beginner at coding. I was assigned to do the Portfolio Optimization tutorial of the Qiskit Finance Tutorials and input real data. Truth be told, I'm clueless. It's my understanding…
Lana
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1 answer
From DFT to QFT python/qiskit
I have the following code
x = [1, -4, 5, -2] # Data points
N = len(x) # Number of samples
n = np.arange(N) # Current sample
k = n.reshape((N, 1)) # Current frequency
e = np.exp(-2j * np.pi * k * n / N) # Exponential part
DFT = np.dot(e, x)
How…
Steve Bermeo
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My qiskit code's output differ from the Lecturer: Ryan O’Donnell
My qiskit code's output differ from the Lecturer: Ryan O’Donnell
I am testing the table shown in attached image by using qiskit in python3.8.5 and qiskit version {'qiskit-terra': '0.14.2', 'qiskit-aer': '0.5.2', 'qiskit-ignis': '0.3.3',…
chandi-mptk
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Qiskit quantum fourier transform
We have 4 numbers x = [x1, x2, x3, x4]
We want to prepare quantum state Psi somehow to encode x
We want to make QFT on Psi to get Phi = QFT (Psi)
I have no idea how to approach this on qiskit
Steve Bermeo
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1 answer
Shaping Numpy Arrays for pytorch GAN
(pre-processing for qiskit QGAN but the use case is somewhat irrelevant)
I'm a bit lost trying to figure out how to preprocess an image dataset before passing it through a GAN. Below is all the relevant code up to my error. This code is derived from…
jan
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1 answer
How does DenseLayout in qiskit's transpiler work?
I'm looking for an explanation about the Dense Layout algorithm used by qiskit's transpiler.
I saw the source code, but still I don't understand what """Choose a Layout by finding the most connected subset of qubits""" means!
Is there a paper about…
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votes
1 answer
WARNING: BLAS library not found, Qiskit Installation
I'm trying to install Qiskit and am coming across an error:
****************************************************************
*** WARNING: BLAS library not found.
* You can include the BLAS library in the global environment LDFLAGS, eg
* export…
Jlee523
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- 4
0
votes
1 answer
Problem executing Qiskit with Dask. Worker does not start
I am trying to execute Qiskit using Dask. When I submit a function that execute a quantum circuit simulation using Qiskit, it does not work properly and additionally, workers start to produce errors with callbacks. So i decide to start preloading…
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2 answers
IBMQProvider issue
I successfully installed and ran a couple of circuits on a backend the other day (essex).
Everything was ok, results came up, but the next day, once I wanted more QC, I could not manage to get a provider.
I have looked into my account (active),…
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0 answers
Python script slowing down as time progresses [Resolved]
RESOLUTION: Seems qiskit does something weird when you re-use circuits that means running them takes extra time. The solution was to pull
for idx, image in enumerate(this_data):
np.random.seed(42)
quantum_circuits =…
Milan
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1 answer
Returning chance of qubit state as a decimal
I'm trying to run X gates on 2 qubits and then return the chance of the qubit in either state as a decimal. I've searched for answers but I haven't gotten anywhere.
##THE CODE##
import math
import numpy as np
from qiskit import *
from…
