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Newest 'programming' Questions - Quantum Computing Stack Exchange
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Qiskit versions:
I am taking a course of quantum computing, and as it is old, i have been using other imports. For example, now instead of from qiskit import Aer, you need to import from qiskit_aer import Aer(I have ...
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1
answer
117
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Low Fidelity For QFT on IBM
I implemented a 5-qubit QFT circuit using Qiskit and performed quantum state tomography using an IBM backend. However, the reported process fidelity is only ~20%, which seems very low. I am trying to ...
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How to start in Quantum Computing [duplicate]
I am a 19 year old engineering college student currently pursuing CS, my previous 2 sem had courses : C, Python, Data Structures, Calculus, Linear Algebra and Optimization, WebD, Digital Logic Design.
...
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1
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52
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How to construct an oracle and flips the phase of the solution bit strings?
I am trying to solve the boolean problem (x1 or x2) and (~x1 or ~x2 or x3) using Grover's algorithm. The only measured bits are q0, q1, and q2. This is my oracle:
...
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43
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Stabilizers for the XYZ^2 code
From looking at this paper: https://arxiv.org/pdf/2112.06036, I was wondering if there was a straightforward way to code up and explicitly find the stabilizer generators for any arbitrary code ...
2
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52
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How to remove ancilla qubits in Qiskit?
I have a circuit that I must optimize using QAOAAnsatz such as the initial state, but the problem is that this circuit has more qubits (unnecessary ancillas at the end) than the qaoa cost operator ...
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50
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How to make a phase oracle that marks the largest number?
I have a list of strategies each with a corresponding score, I want my oracle to apply the phase shift on the strategy with the largest score value. Without knowing the values beforehand how would I ...
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How can I generate a sample of a unitary 1-design defined via Pauli twirling and a change of basis in Python?
I am working with a linear map $V: A \to B$, and I want to generate a sample of a unitary 1-design over the Hilbert space $A$ in Python. Specifically, the 1-design is defined as:
$$
\chi_0 = \left\{ Q ...
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Is there a way to assign different weights to and get the decoding edges from 2D graphs in each round when using pymatching to decode 3D graph
It seems that when decoding 3D graph, pymatching only gives the overall decoding edges and only takes spacelike-weights in 2D graph which means the weights are the same in each round.
So I'd like to ...
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1
answer
138
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Logical error on Grover's Algorithm protected by Shor's error correction
Hey guys I need some help figuring out why this code will not return the correct keyed result
Basically it is Gorver's Algorithm that is protected by Shor's error correction but when run '000' always ...
1
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1
answer
57
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Fake backendfor ibm_aachen
I am doing some experiments where I am using ibm_aachen. I want to conduct some experiments on Fake backend of ibm_aachen but ...
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166
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BaseSampler error trying to do VQE/QAOA
Trying to run
from qiskit.primitives import Sampler
But I obtain the following:
...
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0
answers
325
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Library import error in qiskit
I am new to quantum comupting qiskit library. I am trying to explore the optimization problems using qiskit. I found the following from the documentation
...
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42
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What does BP-OSD"W" mean?
I'm using ldpc library to analyze bp-osd decoder.
When I read the source of this, I found the OSD-W method. What does this mean? Does this mean the higher order OSD method?
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Circuits generated by qiskit.circuit.library import StatePreparation cannot be transpiled into basis gates
The circuit generated by qiskit.circuit.library import StatePreparation can no longer be transpiled into basis gates in qiskit. I tested it with ...
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