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).
661
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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 ...
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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 ...
- 101
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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?
- 101
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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).
<...
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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 ...
- 21
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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 ...
- 101
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29
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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.
- 573
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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 ...
- 11
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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:
...
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1
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52
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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?
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84
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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 ...
- 27
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101
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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-...
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41
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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 ...
- 9
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203
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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 ...
- 33
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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: ...
- 31
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2
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40
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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 ...
- 161
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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 ...
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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 ...
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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 ...
- 201
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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 ...
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3
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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 ...
- 83
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76
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IS my QUBO too big for QAOA using IBM Quantum computer?
On qiskit, I have defined a QUBO, called qp as follows:
...
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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/...
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83
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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 ...
- 455
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33
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Retrieve calibration data of decommisioned `ibmq` device without API token
I would like to retrieve calibration data (preferably as .json or .rtf) for a ibmq device that has been decommissioned. Moreover, this was a device for which one ...
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136
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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 ...
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1
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72
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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 ...
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82
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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 ...
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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 |+&...
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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 ...
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Did the IBMQ Job Download change of ZIP results
today I realized the contents of the Zip File changed when downloading a completed job. Now when I download a job on IBMQ I get a zip file containing a info.json and a result.txt.
And I checked a job ...
- 161
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Understanding Oracles for Simon's Algorithm
I'm having a hard time understanding oracles in Simon's algorithm. There are lots of discussions here and elsewhere for 2-qubit oracles, but when I go all the way up to 3 qubits, it's confusing. I've ...
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82
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Do not understand error in if-else section
I have tried to build a circuit for encryption.
One function is:
...
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74
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Which IBM composer gate realizes the 2x2 single-qubit $-I$ matrix?
Which IBM Quantum composer gate is used to realize the 2x2 matrix $-I$ acting on a single qubit? And how is it called?
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143
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How can I get real hardware resources for IBM Quantum locally?
When I try to connect to ibm real quantum hardware locally,
from qiskit_ibm_runtime import QiskitRuntimeService
service = QiskitRuntimeService()
I got the ...
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1
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How to add Source and sink qubit in dag Circuit
i want DAGCircuit like this
The Following is my Source code
...
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How to represent two gates addition on Qiskit composer. we can do tensor product and multiplication but how to do Addition
How to represent two gates addition on Qiskit composer we can do it in python code by using qiskit library but I would like to visually see how addition of two operators look like in composer.
I am ...
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41
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IBM Q: How to change my results from hexadecimal to computation basis in 1s and 0s?
Hey IBM quantum noobie here, Everytime I run my circuits, I get the results graph’s measurement basis (x axis) in hexadecimal form, how do i change this so that the results graph in in the computation ...
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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?
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IBMQ Errors in submitting multiple circuits
I am trying to submit the multiple circuits in an single job submission.
When I submit 11(or around 10) circuits in a single job, every this goes well,
but, unfortunately, the number of circuits ...
- 11
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Why does Grover's algorithm behaves so different for different solution addresses?
Attached please find two circuits for the IBM quantum composer, that show the outcome of Grover's algorithm with 3 QuBits after 2 iterations for the situation, where the solution is at address 111 and ...
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51
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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 ...
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1
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Any way to share code with others in IBM Quantum Lab? [closed]
Is there any way to share code with others in IBM Quantum Lab, so they can view all updates without being logged into your account?
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Histogram does NOT load on IBM Quantum Composer
I keep getting the error message 'Uh-oh. Somethings not quite right', where the histogram should be, when receving a completed job via both simulator and system on the quantum composer when using my ...
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1
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57
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BOBYQA optimizer IndexError
I'm trying to implement BOBYQA optimizer for my VQE job. Though, I'm facing the below issue. Can anyone help in pointing out what the actual cause of this issue is and how to solve this:
...
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How to construct a high-dimensional Lagrange unitary operator in IBM Quantum Cloud Platform?
Introducing a new generalized unitary operator - Lagrange unitary operator, which is expressed as
$M(\theta ) = \sum\limits_{j,k = 0}^{d - 1} {\frac{{\prod\nolimits_{k \ne j} {({e^{i\theta }} - {\...
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I can't load account on IBM's qiskit
I do this but it still gives an error for load account
IBMQ.delete_account()
IBMQ.active_account()
IBMQ.save_account('myAPI toke ')
IBMQ.save_account('my API toke')
IBMQ.load_account()
entire error
...
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2
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Why is rz gate error not exactly zero in IBMQ washington device?
I am looking at the calibration data for IBMQ's washington device (which is published daily) and am finding non-zero values for the field "rz_gate_error_value".
I used to think that RZ gates ...
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