Questions tagged [ibm-quantum-devices]
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Process Tomography and transpiler not running and eventually crashing kernel
I am running a Quantum Process Tomography on a circuit with a custom pulse added to a calibation for a CNOT gate.
Upon running the circuit, running it on the backend takes forever and eventually ends ...
glS♦
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Gate fidelity reported in the ibm qcs
Simple question: for some retired ibm quantum computers (for instance lima), how was the gate fidelity measured? I know that they involved a kind of average fidelity, but I would like to know ...
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Can IBM Quantum hardware handle any CSWAP at all?
I am designing quantum algorithms where the quantum circuit uses CSWAP gates a lot. The result is very noisy on the quantum hardwares. So I designed really simple circuits to test whether it is indeed ...
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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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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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What can I use instead of mct (multi-controlled Toffoli)? (Grover's algorithm)
I implemented the general diffuser (for arbitrary qubits) in Grover's algorithm in terms of an Multi-controlled Toffoli (MCT) gate (it flips target when all controlled gates are 1). However, this gate ...
CommunityBot
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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 ...
CommunityBot
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How does error accumulate when entangling two distant qubits with limited connectivity?
My goal is to minimize accumulated error when entangling two qubits that cannot be entangled via a single native two qubit gate operation.
I have a coupling map/graph for the qubits of an IBM quantum ...
CommunityBot
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Qiskit result per shot
I want to run a simple circuit with one qubit and a hadamard gate on a Quantum Machine. I want the result of every shot in a list.
It works with a simulator and the get_memory function but this ...
CommunityBot
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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 ...
CommunityBot
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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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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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CommunityBot
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New QASM2ParseError for old circuit on IBM composer
A while ago I wrote an example of quantum teleportation circuit in the IBM Composer which ran fine as of three days ago. Yesterday, however, when I try to run the circuit, I get the following error:
...
CommunityBot
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Can the ancilla for Qiskit's mcx with mode="recursion" be dirty?
I think their implementation is close to the one from here which does use a dirty ancilla, but I just want to make sure
CommunityBot
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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 ...
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