Unanswered Questions
154 questions with no upvoted or accepted answers
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What do "$i$-th basic network", "quantum multiplexers" and "quantum parallelism" mean in this context? How are they beneficial?
I have been reading the paper A quantum-implementable neural network model (Chen et al., 2017) for a few days now, but failed to understand how exactly their algorithm offers a speedup over the ...
CommunityBot
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6
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Quantum State Tomography Implementation in IBMQ
I am working to understand quantum state tomography, specifically using the algorithm presented in PRL 108, 070502. This paper is referenced in IBMQ implementations of QST, both in old deprecated ...
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Is VQA quicker than classical machine learning?
Variational Quantum Algorithm (VQA) is a kind of quantum algorithm corresponding to classical machine learning. Unlike the square speed up of Grover's algorithm, the circuit in VQA does not seem to ...
- 3,251
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Calculating gradient of a gate using Parameter shift rule
I've been following this website to check out how parameter-shift works for calculation of gradients for backpropagation in Variational Quantum Machine Learning Circuits
Most of it made makes sense ...
glS♦
- 26.9k
6
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141
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Bell State 11 not working for parity curve
I am currently writing a script to automate the creation of parity curves for a 2 qubit bell state and then calculate fidelity and proving entanglement from that (inspired by this paper). It was going ...
glS♦
- 26.9k
5
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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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5
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What is the best way to use loop statements on a quantum computer?
I am interested in solving a time dependent linear partial differential equation of the form $Ax=b$ which, in classical computing, would amount to looping over solutions of $Ax=b$ where $b$ is updated ...
glS♦
- 26.9k
5
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160
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Results from looped experiments on IBM Q different than individual experiments
I'm experiencing an issue while using Qiskit where the counts from a job return vastly different values when ran in a loop or as an array of circuits as opposed to single experiments when run by ...
- 17.8k
5
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733
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How to build a quantum circuit representing the Ising Model?
Can someone explain to me how to build a quantum circuit representing the Ising Model? I just want to understand how to represent the Ising Model for the purposes of quantum state label classification....
- 42k
4
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Is gate optimization of superconducting qubits really a reinforcement learning problem?
There has in several scientific articles related to designing gates for superconducting qubits, been proposed to use reinforcement learning to design pulses with high fidelity and short duration.
Some ...
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4
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Implementing Shor's algorithm on IBM Quantum Composer
I'm trying to recreate
from this paper in the IBM Quantum Composer. However, this circuit isn't enough understandable for me to do so.
I have tried to recreate the above circuit in the composer as ...
- 157
4
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86
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Incorrect probabilities in IBMQ Mid-circuit measurements
I calculated the probabilities for two measurements using mid-circuit measurements feature in IBMQ by following circuit:
...
- 577
4
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Reconstructing classical data from quantum feature maps
In the paper [Supervised learning with quantum enhanced feature spaces (Nature, arxiv) by Havlicek et al., a feature map is defined by
$$| \Phi(\bar{x})\rangle=U_{\Phi(\bar x)}H^{\otimes n} U_{\Phi(\...
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4
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What is the actual precision of the IBM quantum computer?
In working with the IBM quantum computer, one can use for example the composer in order to build simple quantum algorithms. Essentially, one usually feeds a phase in order to affect one of the qubits. ...
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Adding team to our IBM Quantum Experience account
I have an account and API token on IBM Quantum Experience (https://quantum-computing.ibm.com/)
I would like to add team members to the account, so that everyone can use it without sharing login ...
