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Newest 'qaoa' Questions - Quantum Computing Stack Exchange
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For questions about the Quantum Approximate Optimization Algorithm (QAOA), first introduced in Farhi, Goldstone, Gutmann 2014 (https://arxiv.org/abs/1411.4028).
198 questions
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2
votes
0
answers
58
views
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 ...
1
vote
0
answers
167
views
BaseSampler error trying to do VQE/QAOA
Trying to run
from qiskit.primitives import Sampler
But I obtain the following:
...
2
votes
1
answer
128
views
Is QAOA diabatic or adiabatic
I have read that QAOA can be interpreted as a first-order Trotter decomposition of an adiabatic quantum evolution that interpolates between an initial Hamiltonian and the final cost Hamiltonian. On ...
- 21
1
vote
1
answer
52
views
How to execute the knapsack problem in cloud service of QC of IBM?
Someone could give a recomendation on how to execute the code show below - knapsack problem using QAOA algorithm, code avaliable on Qiskit documentation - in a quantum computing cloud service of IBM:
...
0
votes
0
answers
27
views
IBM Qiskit not showing usage stats
I've executed QAOA using IBM Qiskit, in my IDE I successfully get an output,
...
1
vote
1
answer
76
views
QAOA Cost Landscape
I am learning quantum computing and I tried to implement QAOA using Qiskit. However, in my implementation, the cost landscape always outputs the same value. In my case its always 3. Can someone ...
0
votes
0
answers
46
views
Can we do QAOA for part of qubits?
For example, there are 10 qubits, the states of the first 5 qubits are fixed, but they still participate in the construction of the cost Hamiltonian. Can I apply QAOA only to the last 5 qubits? I mean,...
1
vote
1
answer
70
views
Qiskit QAOA unexpected estimator
I am doing a portfolio optimisation project using QAOA, I have downloaded stock data with yfinance and framed it my objective function as a qubo problem. Now i am stuck executing
...
1
vote
0
answers
84
views
How are quantum algorithms for decoding fault-tolerant?
There are some great papers that use quantum approximate optimization to perform syndrome decoding (see Lai, Kuo, and Liao (2024), Perez-Garcia and Montanaro (2024), and citations therein).
I am ...
2
votes
2
answers
125
views
Question about QAOA for MaxCut, and adiabatic evoution
I'm experimenting with QAOA for solving some MaxCut instance, and I think I see conflicting explanations online and in the literature. Incidentally, I fail to reproduce the nice decreasing cost/...
1
vote
1
answer
60
views
Determining the J matrix of the ISING Hamiltonian
I am reading from the paper of Utkarsh et al., Solving Vehicle Routing Problem Using Quantum Approximate Optimization Algorithm (arXiv).
And I couldn't quite understand the notation to which the ...
2
votes
0
answers
50
views
How to choose the initial parameters beta and gamma for QAOA classical optimization stage
I read in this question that the initial parameters are chosen randomly, however this can lead to choosing a set of parameters that lead us to be stuck in a local minima.
In this pennylane tutorial ...
0
votes
1
answer
144
views
How to determine the penalty coefficients in QUBO objective functions
I am trying to learn about formulating QUBO problems and their transformation to an ISING problem to be implementable on Quantum Computers.
And I was faced with several variables, that were not clear ...
2
votes
0
answers
92
views
Does quantum algorithm guarantee to solve a combinatorial problem?
One of the applications of quantum computing is to solve practical problems faced in other fields, such as combinatorial problems. One route is encoding the problem into a Hamiltonian and then finding ...
1
vote
1
answer
226
views
Solving a TSP using QAOA
I am reading the QAOA applications and trying the tutorial https://learning.quantum.ibm.com/tutorial/quantum-approximate-optimization-algorithm. I want to just share what I have learnt about QAOA. We ...
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