# All Questions

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### Plotting an ROC Curve with Qiskit's VQC

I'm trying to compare VQC to another algorithm using the ROC curve. I thought of using sklearn, but I am having problem replicating a decision_function for the VQC. The sklearn.metrics.roc_curves ...
1 vote
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14 views

### How to change the qubits of a cirq Circuit?

I am constructing generic circuits, and I would like to change the qubits after creating the circuits. Is there a way in cirq to do so? for instance: ...
• 325
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### Which gate based quantum computer is the best? [closed]

I am interested in Drug Discovery and Materials Simulation. I was told that the IBM 433 qubit quantum computer can only do a circuit of 11 qubits x 11 gates. And Honeywell's quantum computer can only ...
19 views

### How to install qiskit-research in IBM quantum lab?

When I study ‘Dynamic decoupling’, one method is add_dynamical_decoupling. Firstly I should install qiskit_research in my ...
19 views

### Basic import problem for qiskit_experiments module, how to fix?

I'm trying to make use of the qiskit_experiments module but I always get a "No module named 'qiskit_experiments'" error while trying to import it. I've uninstalled and reinstalled qiskit in ...
26 views

### Topmost Universal Gate Based Quantum Simulator?

I am Elijah I'm interested in Drug Discovery and Materials Simulation. I want to purchase a gate based Quantum Simulator for research. I received a proposal. Full State Simulator 30 Qubits on Laptop, ...
1 vote
92 views

### stim : How to create a circuit like qiskit's c_if

In qikit, there is a circuit called c_if that feeds back to the quantum circuit according to the measured results. https://qiskit.org/documentation/stable/0.39/stubs/qiskit.circuit.InstructionSet.c_if....
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1 vote
20 views

### is it possible to use STIM for non-clifford circuits?

I know STIM is for clifford gate circuits but I wonder if there is a way around this? Is it possible to use STIM for non clifford circuits? Do we have any example for it?
• 544
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### Do detection events mean temporal and spatial coordinates?

In pymatching, the check_matrix structure is for stabilizers rather than measurement outcome of stabilizers. I want to plot "matching" for my measurement outcomes.To do that, I need to ...
• 544
1 vote
54 views

### Classical register implementation in Amazon Braket

How to implement classical register in a quantum circuit in Amazon Braket ? I am trying to preproduce results of a circuit build in qiskit on AWS braket services. Thanks
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### Has anyone had problems installing Q# QDK on VS2022? looks like you need dotnet 4.5 [closed]

I installed VS2022 Community Edition, then installed the Microsoft Quantum Development Kit Extension from the Visual Studio marketplace from within VS. The extension downloaded and the VSIX installer ...
67 views

### Classes of quantum circuits that can be "efficiently" simulated

Which kind of quantum circuits can be simulated with classical algorithms in a reasonable amount of time (for a large number of qubits)? For example the ones with only Clifford gates. Or the ones with ...
• 341
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### Why does the single-shot error correction with 3D gauge color codes save qubits or times?

I read about single-shot error correction using 3D gauge color codes. I saw the claim that it enables significant qubit and time overhead improvement regarding 2D surface codes, since it does not ...
30 views

### How to extract resulting qubit states from a circuit after one round of computation?

I'm running the simulation of some circuit on the Qiskit qasm_simulator backend. My end goal is running this simulation several times and finally extract for each iteration the final qubit state and ...
48 views

### Grover, CCZ Gate on IBM Quantum Lab & unexpected outputs

Studying Grover on IBM lab using Qiskit. But the following code produces unexpected outputs. Note that PhaseOracle produces 2 CCZ gates. Could anyone check (and explain) why are those unexpected ...
14 views

### Pymatching decoder version in sinter package

Does the "Pymatching" decoder of the "sinter" python package use Pymatching 1.0 or 2.0? https://pypi.org/project/sinter/
32 views

### Is there a state vector simulator written in pure python?

For educational purposes, I am looking for a simulator written in pure python. It may use scientific-python libraries such as numpy to exploit the data structures they provide, but the core algorithms ...
1 vote
26 views

### IBM Quantum Computing Pulse Control

Does any body know if there is a free IBM quantum computer that supports Pulse Control? All of the ones I see don't support it.
53 views

### 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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