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Questions tagged [qiskit]

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.

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Problems with launch qiskit

I have installed a Python 3.7.2, download anaconda and visual studio code. Install qiskit sdk 0.5.3, and qiskit for Python via pip install qiskit But when I launch my first test program from https://github.com/Qiskit/qiskit-terra I receieved a…
mitrik_bnr
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qcircuit.sty not found when visualizing a QISKit quantum scheme

I followed this manual in order to visualize my QISKit v0.4.8 quantum circuit by means of the latex_drawer() function (in newer versions of QISKit the function is circuit_drawer()). However, I got the following error when running the code: ! LaTeX…
Alexander Pozdneev
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Python Multiprocessing Error with IBM API (Q Experience)

I'm trying to use the IBM Q Experience API and I installed the library and wrote a quick test code. At first, it couldn't find the module. Then, I added the whole sys thing. Admittedly, I just copied that from a stackoverflow post so that may be…
Riley Fitzpatrick
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configure qiskit on win10 error:numpy.distutils.system_info.NotFoundError: no lapack/blas resources found

I’m new to python and I got some problem when trying to install QISKit. First, I was using pip install qiskit on cmd, but it showed an error numpy.distutils.system_info.NotFoundError: no lapack/blas resources found I searched on internet and pip…
Daria Pan
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Credentials are already in use. The existing account in the session will be replaced

I have written this code, and I want to run it on IBM hardware using API_TOKEN. My code is showing this error. from qiskit import IBMQ # IBMQ.delete_account() IBMQ.save_account('API_TOKEN', overwrite=True) IBMQ.load_account() Showing error in the…
Engr. Khuram Shahzad
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Keep receiving Error - AttributeError: 'QuantumCircuit' object has no attribute 'u3'

I am attempting to code a NOT gate on Qiskit and I keep receiving the error. I am not sure what to fix as I also want to run Quantum Battleships with partial NOT gates and it involves the same code. q = QuantumRegister(1) c = ClassicalRegister(1) qc…
Noodle Master
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issue encountered using Backend Estimator using providers from qiskit_braket_providers

I am carrying out a ground state estimation of a molecule via qiskit-nature workflows. As explained in qiskit documentation I define a VQE solver by means of a backend estimator that runs on a specific backend. Normally I use different backends…
Giuliana Siddi Moreau
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Grovers algorithm for specific qubits

Is it possible to use Grover's algorithm on a particular register instead of all qubits? For example, if I have the superposition of 2 qubits and I'm looking to see if qubit 1 is present on the second qubit, can I apply Grover's algorithm to…
Mushahid Khan
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Unable to import Qiskit Aqua and terra Algorithm QSVM as per the documentation mentioned on Qiskit site

I am using google colab. I tried installing qiskit library using the following line !pip install qiskit i also tried this !pip install qiskit-aqua I am trying to work on quantum computing SVM model using the following line of code from…
Aftab Udaipurwala
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Ansatz parameters not getting updated in custom QRNN model (qiskit)

I'm trying to develop a Hybrid-qRNN model to predict a cosine wave. For this, I'm passing 7 values of x(t) and the output is based on the 7th value's output. However, when I call loss.backward() on this predicted output vs the actual y value, the…
Vignesh Krishnan
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Computing gradients and hessian matrix of a VQC model in qiskit

I have been following the tutorial in the following url to set up a VQC: https://qiskit.org/ecosystem/machine-learning/tutorials/02_neural_network_classifier_and_regressor.html However, it is not obvious to me if one could compute the gradients and…
Zhelun Li
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Plotting Superposition of Qubits on a Bloch Sphere in Qiskit

I've been trying to plot the state $\frac{|0>-|1>}{\sqrt{2}}$ using Qiskit. As a result, I need to apply the NOT gate on $|0>$ to get $|1>$ and then apply the Hadamard gate on $|1>$ to get the required state. Here's my code - from qiskit import…
Abhinav Tahlani
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Building Qiskit Aer from source generates Errors

I need MPI support along with GPU (GeForce GTX 1080 Ti, CUDA driver version is 11.4 and running version is 10.1) for which I have to build qiskit-aer from source. My python version is 3.8.16. I have done installing all requirements mentioned in…
aneela
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Contextual Version Conflict

I'm trying to develop a qiskit noise model using pennylane-qiskit, but there seems to be some issue betwee the packages. Here is the code I'm running in my juptyer notebook. import qiskit import pennylane as qml import qiskit.providers.aer.noise as…
Andrew Kim
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ValueError: y should be a 1d array, got an array of shape (100, 2) instead

i was trying to train SVC on same features i used to train VQC, but i am getting the error ValueError: y should be a 1d array, got an array of shape (100, 2) instead. when i try to fit SVC but this features works for VQC, why. can some expalain why…
iron_man
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