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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).

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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 ...
diddyDANK's user avatar
1 vote
0 answers
31 views

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 ...
antony paul's user avatar
1 vote
0 answers
18 views

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 ...
Deren  Liu's user avatar
1 vote
0 answers
30 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
2 votes
2 answers
46 views

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: <...
Yang Qian's user avatar
1 vote
0 answers
38 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
  • 111
1 vote
2 answers
64 views

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 * ...
Dilma David's user avatar
2 votes
0 answers
27 views

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 ...
user20762126's user avatar
0 votes
1 answer
36 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
0 votes
0 answers
53 views

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 ...
alejandra's user avatar
0 votes
2 answers
2k views

IBMQ import error

I am trying to import IBMQ from qiskit. But I encountered following error. ...
Priyam Bharadwaz's user avatar
2 votes
3 answers
473 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
53 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
230 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
0 votes
1 answer
46 views

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 ...
Radu M.'s user avatar
  • 218
1 vote
0 answers
42 views

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

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 ...
Root Groves's user avatar
1 vote
0 answers
31 views

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 ...
chickenj0's user avatar
1 vote
1 answer
35 views

Is qiskit.pulse.SamplePulse deprecated?

I'm currently following along the book "Learn Quantum Computing with Python and IBM Quantum Experience" by Rodert Loredo and I am at chapter 8 - Generating pulse schedules on hardware. The ...
Johannes Jyrgenson's user avatar
2 votes
0 answers
63 views

Quantum Annealing on IBMQ using Qiskit-Pulse

Qiskit-Pulse is the analog level control SDK of IBMQ hardware. Is it possible to implement an adiabatic annealing protocol/algorithm on IBMQ hardware using Qiskit-Pulse? Not asking about QAOA, which I ...
The Quantum Enthusiast's user avatar
0 votes
1 answer
51 views

Frequency of qubits in qiskit simulators

I am trying to study the effect of dynamical decoupling sequences (Hahn Echo and CPMG) using qiskit's qasm_simulator with an added noise model from ...
Neelesh Vij's user avatar
1 vote
0 answers
45 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
1 vote
0 answers
29 views

ZNE for mitigating errors in probability distribution results

Can ZNE be applied to mitigate errors for getting the probability distribution in the computational basis rather than mitigating errors for calculation of expectation values?
Amey Meher's user avatar
4 votes
1 answer
155 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
0 answers
57 views

In qubit phase tracking, does the phase $\delta$ have to be synchronized to the Larmor precession?

In many textbooks (e.g. LaPierre 2021 or Byrd 2022), when dealing with the physical implementation of quantum gates in spin qubits, Larmor precession is usually introduced first as a way to rotate the ...
jackphen's user avatar
1 vote
0 answers
34 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
2 votes
1 answer
40 views

Is it possible to do the transpilation with a priori retired devices?

Is it possible to do the transpilation with "any" device in qiskit? I would be interested in doing this with already retired devices.
user2820579's user avatar
1 vote
0 answers
92 views

An unexpected result of the Implementation of a finding minimum values algorithm using a qRAM

Motivated by the article Quantum algorithm for finding minimum values in a Quantum Random Access Memory, I'm training to implement a simplified version of the proposed algorithm. But the output isn't ...
j__j's user avatar
  • 11
0 votes
0 answers
43 views

Error: module 'rustworkx' has no attribute 'visit' when trying to execute a quantum circuit in a real quantum computer from IBM

I am trying to use a real quantum computer from IBM. I have the next code: ...
Marcos Quintas Pérez's user avatar
0 votes
1 answer
91 views

Are quantum simulation results more accurate than real IBMQ device results?

Getting two different results from simulation and rel IBMQ device. Which is more accurate?
mr coder's user avatar
0 votes
1 answer
198 views

How can one obtain all calibration data which is needed to plot error_map of the ibm backend from few month ago?

I want to plot the error map of an IBM Quantum backend from the calibration data I saved a month ago. The saved file just contain qubit properties and to plot error map I would need all information ...
Shil S's user avatar
  • 27
0 votes
1 answer
303 views

Design a full adder to add two 4-bits integer and measuring on 4 quantum states

I am trying to implement a full adder with minimum of 8 qubits to add two 4 bit integers. Integer 1 will be added on q[0-3] while integer 2 will be added on q[4-7]. The output will be measured on q[0-...
Bob's user avatar
  • 1
0 votes
0 answers
50 views

Quantum Crosstalk in gate scheduling with different gates

I am working on quantum crosstalk, specifically on CNOT and SWAP gate operations that lead to crosstalk. I have encountered works that decompose CNOT and SWAP with iSWAP and CZ gates. I would like to ...
Indu's user avatar
  • 9
3 votes
1 answer
491 views

Output of my quantum circuit to create 3-qubit GHZ-like state does not make sense mathematically

I want to create the GHZ-like state, $|\Psi\rangle = \frac{1}{\sqrt{2}} \left(|011\rangle - |100 \rangle \right)$. I build my circuit in the following way. apply the x gate to the first and third ...
molan li's user avatar
1 vote
1 answer
197 views

If Statement OpenQasm 2.0

in the documentation for OpenQasm 2.0 it says one can use an if statement like so: if(c_reg==int) Quantum Operation. However, I would like to execute the following: ...
Sam's user avatar
  • 31
0 votes
2 answers
51 views

Question Related to the Qiskit Statevector_simulator, which returns the probability in a mixed form each time

""" ...
AP110's user avatar
  • 7
1 vote
1 answer
142 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
1 vote
1 answer
176 views

How to avoid measurement in Quantum Computing?

Using Qiskit, I tried to implement "weak measurement" to avoid measurement but it looks like a hard task for my skills-set. If you have any guidance for that, kindly purpose! Besides that, I ...
Seif Mostafa'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
1 answer
92 views

Qiskit's measurement error mitigation from counts data only, in 2023

Months or years ago, in a remote part of the globe, someone accessed an IBM Quantum computer online to perform a real experiment. She saved the resulting measurement outcomes of the algorithm in csv ...
PDRX's user avatar
  • 201
0 votes
1 answer
84 views

In qiskit, how to consider only readings conditioned to some measurement outcome?

In a five qubit (q0, q1, q2, q3 and q4) quantum circuit, I need to consider only those measurement readings of q0, q1 and q2 for which q3 and q4 measures 0. More specifically, I am trying to implement ...
User3912's user avatar
1 vote
3 answers
549 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
1 vote
0 answers
111 views

IS my QUBO too big for QAOA using IBM Quantum computer?

On qiskit, I have defined a QUBO, called qp as follows: ...
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
0 votes
2 answers
97 views

Is there a matrix exponential $e^{iA}$ gate in IBM Quantum Experience?

Is there a gate that can perform the matrix exponential operation $$e^{iA}|\Psi\rangle$$ in IBM quantum experience API? What is the name and symbol for this type of gate (or some other gates that can ...
James's user avatar
  • 491
2 votes
2 answers
363 views

Trying to understand a quantum adder

I've implemented a quantum adder and, when I build the results table, I'm having some trouble to understand what's going on. First, I'm using the adder quantum circuit proposed in this paper, which ...
Herr Schrödinger's user avatar
2 votes
1 answer
93 views

Converting a Matrix to a Gate in OpenQasm 2

I am a beginner when it comes to quantum computing so forgive me if this is a dumb question. Does anyone know how to create a gate from any matrix on OpenQasm2? Specifically, can anyone provide any ...
Sam's user avatar
  • 31
2 votes
1 answer
131 views

What is the probability of measuring in the following circuit?

So given the circuit and $|\psi\rangle = \alpha|0\rangle + \beta|1\rangle$ above I would like to see what the probabilities of each possible measurement are. To do this I tried expanding the circuit ...
Piotr's user avatar
  • 21
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
0 answers
67 views

an issue with the execution time of a VQC classifier on an IBM quantum machine

I tried to use the available open-source IBM quantum machines. I’m trying to do a classification using the VQC classifier to classify data, but I encountered a problem. The VQC keeps fitting on the ...
lynda lebdjiri's user avatar

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