All Questions
Tagged with ibm-quantum-devices qiskit
91
questions
1
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23
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Retrieve old jobs from IBM qcs after later qiskit changes
I don't know anymore how can I retrieve old jobs from qiskit via the jupyter notebook. When I try to use the commands
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- 631
1
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1
answer
27
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qiskit_aer.aererror.AerError: 'unknown instruction: ccry'
I'm trying to use qiskit_aer_gpu 0.14.2 with qiskit 1.1.0
I defined the class CCRYGate() y another script gate.py
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- 31
2
votes
1
answer
105
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Does Qiskit SamplerV2 change circuit depth?
I'm currently implementing some algorithms on IBM quantum devices. After the migration to qiskit 1.0, I started using primitives and SamplerV2.
What I observed is that even if I manually select a ...
- 21
1
vote
0
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36
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qiskit transpile taking forever to run while CPU usage near zero
I am using the following code to use IBM's quantum computer. My understanding is that it is required before circuits are passed to the real quantum computers as certain operations and instructions ...
- 121
0
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0
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83
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Qiskit IBM Runtime EstimatorV2 has changed the user specified default number of shots
While I am running some simulations on IBM hardware, I've noticed that the number of shots recorded in the metadata of the job is different from the number of shots I've specified. For example, I've ...
- 141
1
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1
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61
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IBM quantum computer backend cycle time and real gate duration
I am new to dynamical decoupling and is trying to study this from qiskit: https://docs.quantum.ibm.com/api/qiskit/qiskit.transpiler.passes.PadDynamicalDecoupling . There, they are specifying the ...
- 33
1
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1
answer
90
views
IBM Quantum payload error
I've received the following error on one of the circuits I'm running on IBM Quantum devices (on IBM Brisbane) using EstimatorV2 primitive.
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- 141
0
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2
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63
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Quantum Computing - via Qiskit - error 403
A year ago, I registered in the IBM Quantum Computing app, which provides access to quantum computers and to simulators. I got an API key, and was able to run some programs.
However, lately, I try to ...
- 11
3
votes
1
answer
220
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IBM fake backend vs real backend
It is claimed that the fake backends of IBM will have noise similar to the real backends. However, to what extent can we expect them to produce the same results?
I have run my quantum circuit on the ...
- 121
1
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0
answers
62
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How to run the post processing and return results in QAOA?
As suggested in TranspilerError: 'Number of qubits (40) in QAOA is greater than maximum (30) in the coupling_map' issue. I managed to submit the job to IBM quantum and the circuit runs successfully.
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0
votes
1
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90
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QiskitBackendNotFoundError - Unable to run the backend using BackendEstimator primitive
I am trying to run a small quantum circuit and generate the expectation value of an observable using the BackendEstimator primitive by incorporating the noise model ...
- 23
1
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0
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48
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Low Fidelity In IBM Quantum Computers
I am just trying to calculate the highest fidelity of preparing GHZ states on IBM quantum computers and I run my circuit on qubits with the lowest readout error. However, I just obtain fidelity of the ...
- 121
2
votes
2
answers
399
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TranspilerError: 'Number of qubits (40) in QAOA is greater than maximum (30) in the coupling_map'
Hi Ive been trying to solve a custom PO problem using QAOA and I ran into this particular error. As per my understanding,this is due to the limitation of the simulation hardware. But as per the ...
1
vote
1
answer
35
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Set Initial Layout for State Tomography
I am trying to do some state tomography to generate GHZ states and calculate fidelity. For running the code, I want to execute my code with the qubits with the lowest readout error using initial ...
- 121
1
vote
2
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162
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Query about Obtaining Measurement Counts on IBM Quantum Platform
I hope this message finds you well. After nearly a year, I've recently returned to using the IBM Quantum platform to run quantum circuits. I've noticed several changes in the process compared to my ...
