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).
663
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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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3
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2
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95
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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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3
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201
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Quantum computing coding setup for a beginner
I want to dive into Quantum computing but I don’t have a personal computer for coding. I have an iPad and I know some quantum computing basics. I had earlier used IBM quantum experience (IBM’s cloud ...
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How to get the compiled circuits and measurements from a Qiskit Runtime job
I have not been able to find any way to retrieve the compiled circuits and the measurement counts used for a Qiskit Runtime job. This page describes the various error suppression mechanisms available. ...
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IBM Q - Unable to see the results of a completed job
I ran a few jobs on IBM Q. The jobs are completed, as can be seen here:
but I cannot see the results of the jobs, as can be seen here:
I tried to retrieve the results using qiskit from backend, ...
2
votes
1
answer
181
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Realizing Haar random unitary matrix on IBM Q
I am thinking about if it is possible to achieve Haar random single qubit unitary matrix on some real quantum computers like IBM Q. I am reading a paper https://arxiv.org/abs/2203.04338. In this paper,...
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1
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IBM composer deletes my circuit
When I work on the IBM quantum composer and I switch to another circuit, my first circuit is destroyed and replaced by the second one. I thought it was a display bug, but when I restart the composer, ...
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3
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How to improve results from the IBM Quantum hardware?
I have a simple dynamic circuit as follows. I ran it on the IBM simulator and the real quantum hardware. The result from the simulator is 100% mathematically accurate. The result from the hardware has ...
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1
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Check gate errors of old jobs in IBMq
How can I check the gates errors and other device configurations of a past set of jobs ran in IBMQ? I have the line
...
- 573
3
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1
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Simulation files for noisy quantum circuits
For our study with Yosi Rinott and Tomer Shoham we need the following simple data:
Starting with a quantum circuit $C$ on $n$ qubits we need two files:
a) A file of probabilities (or amplitudes) for ...
- 201
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What is the status of IBM Quantum Dynamic Circuits?
According to this IBM roadmap (https://research.ibm.com/blog/quantum-development-roadmap), the feature of dynamic circuits should be ready by 2022. Now, it is approaching the year end soon, but I ...
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Why Circuit error when I use append(U)
I am new of this field.
I want to make custom Unitary transform. I make a test matrix with Identity matrix.
If I use UnitaryGate and append it to main circuit, it would not work.
Here is my code.
I ...
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1
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1
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132
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I've wrote code on an outdated version of QisKit but what to run it on a quantum computer
like mentioned in the title I've got working code on an outdated version of QisKit which I run on my own IDE. However I am wanting to run this on a real quantum computer and I can't do this as IBM ...
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1
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100
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Implement muti-qubit controlled gate with 2 Z/X gates
This paper simulates duality mode to solve sudoku puzzles. The last diagram in the paper (shown below) illustrates multi-qubit controlled gates with two Z/X gates. I wonder if Qiskit can directly ...
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Specifying the shape of pulse in RoughFrequencyCal
I've been following upon this document for device calibration.
https://qiskit.org/documentation/experiments/tutorials/calibrating_real_device.html
Is there any way to specify the pulse shape for the ...
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1
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1
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95
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Syntax of Importing LogicalExpressionOracle in IBM Quantum Lab
This article provides a sample code to use Grover's algorithm to solve SAT problems. It requires importing a method called LogicalExpressionOracle. However, when I copied the code into IBM quantum lab,...
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66
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How to create Parametrized Operator
How to transform the U3 gate of parameters (theta, phi, lambda) to an Operator. (in qiskit)
The following code don't work
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99
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problem with parametrized circuits
I used a circuit with one parametrized gate U(theta, phi, lambda), than I fixed the parameters with qc.bind_parameters and it's worked well. But the only step that don't work is the execution in a ...
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How the real IBM quantum computers apply arbitrary Rz(θ) gate rotation? [closed]
I want to ask the following questions:
(1) The basis gate set of IBM quantum computers is { Id, Rz(θ),√X, X, CNOT, reset}. Somebody said that IBM didn’t really apply Rz(θ) gate on the machine. The ...
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602
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Number of qubits does not match the number of qubits of the observable
I have to compute $\langle\psi_1(\theta)|H_1|\psi_1(\theta)\rangle$
where
$$H_1 = X_1Z_2 +3Y_0Y_4$$
...
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1
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2
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what quantum computing simulator can achieve drag-and-drop programing fuction without internet like IBM web composer?
I reallt need some kind of simulator can work like this.Quirk is similar but also require internet.can anyone know how to achieve this?It is very important for some eaducational lesson to students.
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1
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191
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How to you initialize a qubit into a magic state in IBM Quantum composer
I want to build/prepare a qubit transforming from $\vert 0 \rangle$ into a magic state. How do I do that?
the particular magic state I have in mind is the following,
$$ |\varphi\rangle = \frac{1}{\...
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1
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1
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Histogram does not reflect quantum device results
I created the following code to run a simple circuit through a quantum device twice. My purpose was to show the effects of noise with different arrangements of qubits when using ibmq_belem.
...
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1
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77
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Is there code to generate the statevector amplitude histogram for a circuit outside the Composer?
When using the IBM Composer, in the bottom left of our screen we have access to two histograms. A theoretical probability histogram and a statevector amplitude histogram. I'm looking for ways to ...
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138
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How to use more than 3 classical registers in a single quantum circuit in Qiskit without getting error: not enough memory slots?
I'm trying to run a quantum circuit on qasm simulator which has more than 3 classical registers. It gives error when I try to execute it. The circuit looks ...
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1
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264
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Publicly available samples for quantum circuits and/or simulators
With Yosi Rinott and Tomer Shoham we studied various statistical aspects of samples coming from NISQ computers.
My question is about available data consisting of samples from NISQ computers
We would ...
- 201
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1
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179
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Extracting results from a job when it is in a json form
I have downloaded a job from the COMPOSER JOBS but I get a folder containing three files.
632867a95ccea778be9446fb-info.json
632867a95ccea778be9446fb-input.json
632867a95ccea778be9446fb-output.json
...
1
vote
1
answer
126
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Parallel calculation of expectation values of operator for different quantum states qiskit on a QPU
I need to calculate the expectation values of an operator h for various quantum states ψ on an IBMQ quantum machine. This can be ...
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2
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60
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Retrieving jobs of an expired access device
I had private access to a quantum computer, but the access is expired. So Can I access to my jobs done on it ?
The '''backend.retrieve_job('')''' can't work because I cant load the backend (no access)...
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1
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365
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Difference between qiskit SPSA optimize and minimize in runtime program
I use this tutorial with pennylane-qiskit.vqe_runtime_runner to familiarize myself with qiskit runtime using pennylane. Thereby, I wonder:
What is the difference between qiskit.algorithms.optimizers....
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3
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3
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773
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What is the maximum number of qubits to execute a circuit on real hardware with IBM Quantum Experience and Qiskit?
I can't find anything that says about this. I know that on some simulators there are a limit of 32 qubits (quasi simulator) or more. But on real hardware ?
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0
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Can a Quantum computer simulate classical hack and exploit in a network ? Also how would it be any different from the classical computer [closed]
I'm trying to write a realistic story around Quantum computing and was wondering how different a network exploit/hack would look if a Quantum computer was to hack into a private network, instead of ...
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2
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62
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Qiskit: Can I run real experiments in QPUs with OOP structured code?
The question might be naive, but I'm hesitant to design my algorithm in a complex, Object-Oriented scheme (custom classes, objects etc.). My fear is that current frameworks (e.g. ibmq, qiskit-runtime) ...
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132
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How to extract per shots measurement result from ionq device using qiskit_braket_provider?
I'm running a circuit on ionq device using qiskit_braket_provider. I want to extract per shot measurement results. While running ...
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4
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1
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250
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Is there a tutorial for error mitigation in qiskit that does not use the deprecated ignis?
Working through the qiskit text I have come accross measurement error mitigation a few times (Measurement Error Mitigation, Lab 3: Quantum Measurment,...]. In the online textbook the coding indicates ...
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0
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51
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A path towards building quantum Computing graduation project for undergraduates
I need help. I'm a computer science student with a Data science major. I have a final graduation project this year. With that, I want to create a project in the Quantum computing field. I'm already ...
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0
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duality quantum computing simulation
I am a starter of this quantum mostly new to quantum computing but I wonder if there is any option of simulating duality quantum computing in qiskit or IBM q or any other alternative way?
Duality ...
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How to draw CCZ gate in IBM Quantum composer
How to draw CCZ gate in IBM Quantum Composer? There is no CCZ gate in quantum composer.
In addition to this, please help me to draw the gate shown in below figure in quantum composer.
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2
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Why after breaking the entanglement does the phase disk in the second qbit not match the result?
I am new in IBM composer quantum and I have a doubt.
I have the next circuit
After reinitializing q0 and reading it. (breaking entanglement) The phase disk for qubit q1 says that 100% is 0, but the ...
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0
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Copying a reduced noise model from an IBM device
I need to use the noise model coming from a large IBM device. Nonetheless, I do not need to use the whole Noise Model. I only need the information of let's say qubits [10:15] and [20:25]. That would ...
2
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2
answers
140
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Where are the multi-qubit openpulse computers?
As the question says, I'm looking to run some pulse schedules on quantum computers. Right now, I'm really only able to find ibmq_armonk (from IBM) to be an openpulse computer that I am able to use. I'...
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How to send another job to a device before finishing the last job?
Is there any way to create a for loop that would send a few jobs to run on a quantum computer simultaneously? I tried:
...
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1
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What is "time in system" for a given job and how to retrieve?
I noticed that there is "time in system" for each job.
For example:
I was wondering what does this mean? I am guessing this means the time of the first shot starts on the quantum devices ...
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1
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319
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How to get statevector of qubits after running quantum circuits on IBMQ real hardware to calculate the fidelity of all qubits individually?
Is it possible to get the statevector while running quantum circuits on IBMQ real hardware? If getting the statevector is not possible can I still calculate the fidelity of a qubit somehow?. What I ...
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160
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IBM Quantum Lab - Server unavailable or unreachable. Would you like to restart?
In the following circuit, I want to perform tomography on the qubits 0,1,2,3 after qubits 4,5,6,7,8,9 are measured.
I run the circuit using with measurement gates on qubits 4,5,6,7,8,9 with the ...
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2
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How to deterministically add two integers on a quantum computer
I am new to the Quantum Computer world. I understand the basics of Quantum mechanics and I have watched a few lectures on Quantum computers, Quantum gates and played a bit on IBM QC.
As far as I ...
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2
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376
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which device had the best Average coherence time?
These are the IBM backend overview, do: Avg.T1/T2: here stand for the Average decoherence time or coherence time?
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336
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How can I know the number of qubits used in a job in qiskit?
How can I know the number of qubits used in a job in qiskit?
I can always do something like
...
- 573
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1
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82
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Hadamard on first qubit for two qubit state doesn't output what it should on Qiskit
I'm using python qiskit==0.36.2.
The following code:
...
3
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1
answer
408
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How can I write if conditions on quantum registers using qiskit
There is a quantum register measured to state $\left|00\right> $ How can i write a code to check weather the first qubit in measured state is 1 or zero and if 1 do some operations or if 0 do other ...
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