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Questions tagged [ibm-quantum-devices]

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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 ...
G.Lebonwski's user avatar
1 vote
0 answers
21 views

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 ...
Deren  Liu's user avatar
0 votes
0 answers
33 views

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 ...
squareroottwo's user avatar
1 vote
1 answer
29 views

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 ...
Tianqi Chen's user avatar
1 vote
1 answer
31 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. ...
squareroottwo's user avatar
0 votes
2 answers
37 views

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 ...
JDias's user avatar
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2 votes
1 answer
94 views

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 ...
Deren  Liu's user avatar
1 vote
0 answers
37 views

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. ...
Lasal Hettiarachchi's user avatar
0 votes
1 answer
49 views

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 ...
Pamul Yadav's user avatar
2 votes
0 answers
16 views

Running VQE code using qiskit_nature on IBM computers

$\texttt{qiskit_nature}$ no longer has the $\texttt{runtime}$ feature and $\texttt{VQEClient}$ function that was used to run a VQE code on one of the IBM computers. I could not find any easy migration ...
chiral_fermion's user avatar
1 vote
0 answers
36 views

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 ...
physicino's user avatar
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2 votes
2 answers
296 views

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 ...
Lasal Hettiarachchi's user avatar
1 vote
1 answer
26 views

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 ...
physicino's user avatar
  • 111
0 votes
1 answer
34 views

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. ...
Manu's user avatar
  • 493
1 vote
2 answers
87 views

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 ...
Byeongyong Park's user avatar
6 votes
0 answers
45 views

Resources on the energy consumption of IBM quantum computers?

I am seeking information regarding the energy consumption of IBM Quantum Computers, specifically inquiring about the energy requirements associated with individual gate operations. Could you also ...
goga suknidze's user avatar
2 votes
3 answers
374 views

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: ...
Amey Meher's user avatar
0 votes
1 answer
46 views

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 ...
Amey Meher's user avatar
1 vote
1 answer
109 views

What is the current qubit reset mechanism on IBM Quantum devices before running a new circuit?

What is the current qubit reset mechanism on IBM Quantum devices before running a new circuit? One could either wait long enough (as much as 2 ms perhaps) in order to ensure that all qubits decay to ...
Radu M.'s user avatar
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1 vote
1 answer
150 views

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. ...
Manu's user avatar
  • 493
1 vote
1 answer
112 views

Run a circuit on "simulator_statevector" of the IBM Quantum Platforms

I would like to obtain the statevector of a QuantumCircuit using the simulator_statevector (and Qiskit) of the IBM Quantum ...
stopper's user avatar
  • 463
-1 votes
2 answers
240 views

Instruction h is not supported

I'm new at quantum computing and I'm trying to run a script with IBM quantum. I'm using brisbane and getting that error "Instruction h is not supported". I get the same error for cx gate as ...
Ecem 's user avatar
1 vote
0 answers
96 views

Understanding frequency sweep results on superconducting quantum computers

I have run some frequency sweep experiments on ibm_osaka quantum computer from IBM. The experiment is presented here in detail: https://qiskit.org/textbook/ch-quantum-hardware/calibrating-qubits-pulse....
Radu M.'s user avatar
  • 218
1 vote
1 answer
62 views

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 ...
EFH's user avatar
  • 11
0 votes
1 answer
104 views

Equivalent method to `get_counts()` for `Aer_simulator`?

I was working on a quantum circuit and recently switched from using a local AerSimulator to some of the quantum backends provided by IBM. When I used ...
Ash Ketchum's user avatar
3 votes
1 answer
136 views

Underlying Hamiltonians and pulse level controls of different commercially available quantum computers

My research area is in quantum state transfer, and I am trying to perform a 'proof of principle' that requires the underlying Hamiltonians of quantum systems and the control I can have on these ...
ZacB's user avatar
  • 31
1 vote
1 answer
73 views

Current situation of quantum computing with respect to physical vs logical qubits

As an example I'm going to start with Google and IBM. Google has the Sycamore processor right now with 53 physical qubits. However I haven't found any info on how many logical qubits it can actually ...
Omeglac's user avatar
  • 155
1 vote
0 answers
44 views

PulseSchedule jobs not getting submitted on Pulse enabled machines on IBM Quantum

There was a recent migration, referring the below document: https://qiskit.org/ecosystem/ibm-provider/tutorials/Migration_Guide_from_qiskit-ibmq-provider.html Before this migration, I was using IBMQ ...
Amey Meher's user avatar
4 votes
1 answer
130 views

Retrieving job result attributes in Qiskit

I am trying to optimize a Hamiltonian using QAOA in IBM Qiskit. I used the following 'minimize' function to get my result. (I am not including the whole code because it will get unnecessarily long). <...
Amrita P's user avatar
1 vote
1 answer
60 views

How to get pulse-level historical calibration data for OpenPulse devices?

I see that there is a way to access historical IBM backend properties such as gate errors and gate lengths (discussed here). Is there any way to also get pulse-level historical calibration data for ...
jchadwick's user avatar
  • 451
1 vote
0 answers
33 views

Running Pulse Schedules with different resilience levels

Is there a way to run a Pulse schedule with different resilience levels? I was thinking about passing the resilience level values in the options of Sampler primitive, but when I tried to run, it says ...
Amey Meher's user avatar
0 votes
2 answers
99 views

How can visualise the old error map of Ibm backend if one save the calibration data of the backend at that time?

I have the calibration data of an Ibm backend and now I want to plot the error map of the device at that specific time. How can I do this?
Shil S's user avatar
  • 27
1 vote
1 answer
55 views

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 ...
ty.'s user avatar
  • 143
3 votes
1 answer
145 views

List of IBM devices

A few weeks ago I was on a website that had a list of IBM quantum devices and it showed the topology and frequency of each of the qubits but I can't seem to find that anymore. I was hoping that ...
Hercislife's user avatar
1 vote
1 answer
84 views

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: ...
Lachlan Belcher's user avatar
1 vote
1 answer
128 views

IBMQ Open Plan Access: How many circuits can i run per job? How many jobs can i run in general?

I think my question is not difficult at all, but I don't find any Information about the Open Plan of IBMQ. Such as how many circuits I can run per job and so on. I could not find the EULA too, I ...
Qubii's user avatar
  • 191
0 votes
0 answers
47 views

How to predict state vector of a quantum circuit in IBM qiskit

How to Predict the state vector output of the following quantum circuit? ...
Khilesh Chauhan's user avatar
2 votes
2 answers
243 views

What is a "quantum communication link"?

The IBM roadmap for scaling their quantum computers refer to a quantum communication link to combine together multiple smaller quantum chips. What is the technology that enables connecting together ...
Jim Haddocc's user avatar
1 vote
0 answers
45 views

Unable to open Qiskit Assignments for Qiskit 2023. (Quantum Challenge 2023) [closed]

Unable to open Qiskit Assignments for Qiskit 2023. (Quantum Challenge 2023) I was very excited to be a part of Qi skit 2023. I went through all the lectures in the crowd cast, but now I am very upset ...
Mriganka Sandilya's user avatar
1 vote
3 answers
497 views

Why does my quantum circuit run so slow on a real IBM quantum hardware?

I have created a very simple circuit on qiskit to produce a Bell state: bell = QuantumCircuit(2) bell.h(0) bell.cx(0, 1) bell.measure_all() And I then run it on a ...
Stéphane's user avatar
0 votes
0 answers
37 views

How to augment a QASM circuit for orbital rotation

Could anyone advise on how to properly augment the hamiltonian circuits in https://github.com/CQCL/ethz-hackathon22/tree/main/benchmarking/circuits for orbital rotation ? https://poe.com/s/...
kevin's user avatar
  • 7
2 votes
0 answers
40 views

Exploiting virtual-$Z_{\theta}$ corrections in QEC

The work done by IBM Researchers to perform virtual-$Z_{\theta}$ gates allowed them to: achieving zero-time relative phase shifts; correcting $Z_{\phi}$ errors occurring when applying some gates -- e....
Daniele Cuomo's user avatar
1 vote
1 answer
160 views

How can I find the documented T1 time of a retired IBM system?

I need to find the published mean T1 time for the 'ibm_oslo' system that I used in an experiment a while back. Unfortunately, that system has now been retired and there's seemingly no way for me to ...
Lucy H's user avatar
  • 13
0 votes
1 answer
76 views

Phase estimation of the Pauli-Y matrix

I'm trying to use the phase estimation algorithm to extract the eigen value for both eigen vectors of the Pauli-Y matrix using the ibm quantum experiance. So far I have this for the possitive state |+&...
Charlie Plath's user avatar
1 vote
1 answer
81 views

Understanding the Quantum Circuit for Bell State Creation with Dynamic Circuit using Qiskit

...
Jeevesh Krishna 's user avatar
2 votes
1 answer
168 views

Is it possible to get access to the old noise model from a few months ago for Ibmq backends?

I performed an experiment on a real Ibmq backend, and the results were satisfactory. I now require the simulation of that experiment. The simulation is not sufficiently consistent with the old ...
Shil S's user avatar
  • 27
1 vote
0 answers
96 views

Execute using circuits on IBM hardware using visual studio code

I have wrote some code using Qiskit in Jupyter notebook using Microsoft Visual Studio Code. Is there any way to run directly on an IBM quantum computer through Visual Studio?
Jack Jack's user avatar
  • 111
1 vote
0 answers
54 views

IBMQ job was not run immediately after it was sent during my reservation [closed]

I got a problem when I sent a job during my reservation on ibmq_guadalupe. My job was in queue position 1 for almost 11 hours. Why was the job not run immediately after it was sent? Is there any ...
afundy hayeeteh's user avatar
1 vote
2 answers
467 views

Sycamore 2 versus Osprey

Google recently hit key milestone by reducing errors: https://www.nature.com/articles/d41586-023-00536-w I would like to know why Google's QPU had way fewer qubits than IBM's Osprey and if IBM also ...
Duen's user avatar
  • 426
1 vote
0 answers
25 views

How do I change the x and y axis on the results histogram for a ibmq_qasm.simulation resulting histogram?

Im following a textbook and when they ran the same circuit with the ibmq_qasm_simulator, their results histogram had computational basis state on the x axis and probability on the y axis, however my ...
user23501's user avatar