Questions tagged [ibm-q-experience]
Use this tag for questions about IBM's Quantum Service - Circuit Composer & Quantum Lab. DO NOT use this for questions about general Qiskit issues (use [qiskit] for that).
24 questions from the last 365 days
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How to get historical calibration data for mthree (M3) from IBM Quantum devices?
I'm using mthree in Batch mode. A batch needs to be queued before it can be executed. The time when a batch was executed can be obtained from the IBM Quantum Platform site, so I would like to obtain ...
- 11
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RuntimeJobFailureError: 'Unable to retrieve job result. Error code 1520; The instruction cost per qubit exceeds the system limit
I want to find two operands of multiplication result of 180. In another word, finding integer factors of 180.
I'm using ...
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Understanding sources of error in 4-bit Grover's search on IBM QC
This question is similar to some others I've come across, related to why a 4-qubit implementation of Grover's search yields such poor results when run on the IBM QC compared to the 3-qubit case (...
- 121
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Does anyone have an idea about the execution power of IBM summit for VQE? I'd appreciate sources of papers as well for supercomputer execution
I'm trying to find the execution power of VQE in super computer and I want to know the factors of execution such as iterations, shots, convergence, etc. Please help me and also, I'd appreciate if ...
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Seeking Quantum Algorithm Implemented on IBM's Accessible Quantum Computers
I am interested in leveraging IBM's quantum computers that are currently available for public access. Specifically, I am looking for an algorithm that has been successfully implemented on a real, ...
- 51
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42
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Run Qiskit Finance Tutorial on IBMQ backend
I tried to implement the qiskit example for portfolio optimization and it works as described. However I am not able to change the backend to one of the IBMQ machines - and it's not clear to me if this ...
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2
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151
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What are some good additional resources when taking IBM Qiskit course?
I am a undergrad comp sci major. I have committed myself to a neuroscience PhD, hopefully computational neuro. However, I recently came across quantum computing, and see that lots of resources are ...
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Performance of quantum annealing systems vs gate based ones
Quantum annealers like D-Wave can be used to solve Quadratic Unconstrained Binary Optimization (QUBO) which is a NP Hard problem (see here) while gate based quantum computers, like the ones created by ...
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Are reset gates allowed on IBM quantum computers?
My circuit involves many "reset" gates. After running on the IBM real backend, the experiment status says "Failed" with error message that says:
Failed - Unknown operation type ...
- 231
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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 ...
- 231
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2
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IBMBackendValueError: number of circuits exceeds the maximum for this backend, 300
I am trying to run the QAOA on the IBMQ device. The QAOA circuit consists of 6 qubits, two layers. The number of total trainable parameters for the QAOA circuit is 14. The toy code is as follows:
<...
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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
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2
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182
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Error while plotting the resulting distribution
I am using this code, as a test of my qiskit, but I am having errors on using the simulator
Building the circuit
We begin by importing Qiskit.
from qiskit import *
...
- 11
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42
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Controlled Ry gate on IBM and IonQ basis gates
As far as I know the basis gates for IBM and IonQ are:
IBM: ['cx', 'id', 'rz', 'x', 'sx']
IonQ: ['rx', 'ry', 'rz', 'rxx', 'id']
I used qiskit.transpile to see check how Controlled Ry gate can be ...
- 21
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IBMProvider.load_account() AttributeError: type object 'IBMProvider' has no attribute 'load_account'
I am trying to resolve the below deprecation warnings I am getting while using IBMQ framework.
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- 513
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113
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How to calculate the state vector of a circuit using sampler().run()
I run a circuit using:
jobCircuit = Sampler(backend).run(circuit)
resultCircuit = jobCircuit.result()
How can I access to a state vector of the circuit? I tried ...
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IBMQ import error
I am trying to import IBMQ from qiskit. But I encountered following error.
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Is there a way to use a fake backend for ibm_brisbane?
Is there a way to use a fake backend for ibm_brisbane?
I tried this but it is giving me the error that the backend is not present:
...
- 135
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1
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105
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Get the error of basis gates programmatically
I want to get the error rates of the basis gates of a backend. Is there a function that can achieve this functionality?
For example, I want the error rates of the basis gates rx, cx of ibmq_mumbai ...
- 135
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1
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493
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QiskitBackendNotFoundError: 'No backend matches the criteria'
I am struggling with the QiskitBackendNotFoundError: 'No backend matches the criteria' even though I am able to see the backends available to me.
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- 513
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51
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How the shots belonging to the same job are scheduled to run on IBM quantum devices?
How the shots belonging to the same job are scheduled to run on IBM quantum devices? Suppose my job has 1000 shots. Will all shots be executed in series, or is it possible they will be interleaved ...
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63
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Interleaved Randomized Benchmarking experiment with custom PassManager
I have a custom PassManager, which calibrates a few gates in the circuit in the transpiler pass. I want to conduct an Interleaved Randomized Benchmarking experiment ...
- 135
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1
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87
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IBM quantum composer possible bug?(state amplitudes of quantum circuit)
I have this quantum circuit:
and from the IBM quantum composer I get this state amplitudes:
I wanted to flip the target qubit and keep only its pure state however this is not what I am getting.I am ...
- 165
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How to represent the gates and the quibit states in the 'Hello Quantum' iOS game in IBM Quantum Learning graphical simulator
The Hello Quantum ios game developed by IBM has the X, Z, H and CZ gates manipulating a 2 qubit array (im not sure if array is the right word?).
I want to know how I can represent the qubit states in ...
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