Quantum computing framework for writing programs and applications
Qiskit is a quantum computing framework for writing programs and applications, and performing quantum experiments.
Questions tagged [qiskit]
120 questions
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The Universtal Gate U(theta, phi, lamda) in Open QASM vs Qiskit
I have noticed that Open QASM and Qiskit define the universal single-qubit gate U(lambda, theta, phi) differently. The difference causes a phase difference in RZ, for example.
Has anyone come across this problem? Which should one choose?
Robert Singleton
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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
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1 answer
AttributeError: 'QuantumCircuit' object has no attribute 'config'
I am working on a program for Qiskit, but I am getting a strange error (one that I have not gotten in the past) when I try to simulate a circuit. Here is a minimal example producing the error:
from qiskit.circuit import QuantumCircuit
from qiskit…
Owen D
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1 answer
How to do a zipped SWAP in Qiskit?
I have a circuit with two registers, m, and q.
from qiskit import execute, Aer, IBMQ, QuantumCircuit
m = QuantumRegister(3, "m")
q = QuantumRegister(3, "q")
cl = ClassicalRegister(2, "cl")
circ = QuantumCircuit( m, q,cl)
circ.x([q[0],q[1],q[2]])…
user9318
- 111
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2 answers
installing requirements-dev.txt from Qiskit raises an error with SQNomad
I am trying to install the following requirements with…
Jimmy Knopf
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0 answers
qubit/cbit arguments does not match gate expectation
I am trying to use the code tutorials/finance/09_credit_risk_analysis.html for 3 assets. Face problem in running line 13: # define the registers for convenience and readability.
The error: ---> state_preparation.append(agg.to_gate(), qr_state[:] +…
Aryabhat
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IBM quantum simulators run on cloud or locally?
Do qiskit simulators run locally or on IBM cloud servers? It seems that each time I have used them, my computer goes into max CPU, and sometimes the simulation runs out of memory, exiting with out of memory error message.
creet
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1 answer
ValueError: numpy.ndarray size changed on importing qiskit
While trying to run the following commands on Jupyter
from qiskit import QuantumCircuit, Aer, BasicAer, execute
from qiskit.visualization import plot_histogram
I am encountering the following error.I am using python 3.8.
Does anyone have any idea…
Osama Younus
- 115
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1 answer
Can I change the byte ordering from little endian to big endian in qiskit?
The regular Matrix representation of a CNOT gate as found in literature is:
CNOT =
\begin{bmatrix}
1 & 0 & 0 & 0\\
0 & 1 & 0 & 0\\
0 & 0 & 0 & 1\\
0 & 0 & 1 & 0
\end{bmatrix}
However in…
Reema Hajjar
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1 answer
Failed Qiskit installation with Anaconda on Windows
I'm attempting to install Qiskit via pip and Anaconda on my machine. Here's my process
1.) Install Anaconda
2.) Open Anaconda 3 prompt
3.) Create a virtual environment using conda create -n python=3 command (I've created the…
michaeltheedev
- 11
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1
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1 answer
Visualizing circuits in qiskit with matplotlib
I'm learning how to use qiskit and I'm using the jupyter notebook, but everytime I try to visualize the circuit with the attribute draw I get this error:
import qiskit
from qiskit import *
from qiskit import IBMQ
qr = QuantumRegister(2)
cr =…
SAR_90
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2 answers
The class MatplotlibDrawer needs pylatexenc. to install, run "pip install pylatexenc"
I am using colab for qiskit and even after installing pylatexenc using pip this still comes as an error, I also used !pip.Here's the full pic
Ankit_cnarte
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0 answers
Why can't we add 'rx'(Rotation around X-axis) and 'ry' gates to the noise model basis gates in Qiskit?
I can easily add any Unitary gate which I create using Qiskit but it gives a warning when I try to add these rotation gates to the noise model basis gates. It might be a problem with the labelling(I used 'rx' and 'ry') or some other issues which I…
Pingal Pratyush Nath
- 11
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1 answer
Python quantum Fourier transform
This is the inverse quantum Fourier transform. What changes do I have to do to obtain the quantum Fourier transform (not the inverse)?
Is this in the right path at all?
How would I encode values x1,x2,x3,x4 into the basis state?
from math import …
Steve Bermeo
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My Bloch sphere is appearing as an ellipse/oval
I tried to plot a Bloch vector. However, my Bloch sphere is appearing as an ellipse/oval instead of a circle. I am having the same issues with qsphere also.Jupyter notebook on my Mac(Safari)
from qiskit.visualization import…
Shalabh Agarwal
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