Questions tagged [resource-request]
For questions that involve a request for resources to learn anything related to quantum computing or quantum information.
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Why EfficientSU2 in QGAN
In Qiskit's QGAN example, the parameterised quantum circuit to be trained is the EfficientSU2. I have not found any citation there on the choice of this circuit, and the only justification is that it ...
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References for quantum state praparation: what states are easy to prepare and which ones aren’t?
I’m looking for references on quantum state preparation. I know there’s a plethora of papers on this topic but I don’t know how to narrow it down or figure out which ones to prioritize. In general, I’...
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A Toffoli gate can be decomposed into a circuit of 1- and 2-qubit gates
While reseaching a way to implement a 3 qubit Toffoli gate, I came across this circuit:
However, I cannot find a proper source for this circuit. Can anyone link a cited paper.
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What is complete structures of the photonic quantum computers?
I am interested in studying quantum computers based on photonic integrated circuits. I am looking for a site, article, book, or material that will introduce the process of its implementation step by ...
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The possibility of a Quantum image classifier
I want to create an exhaustive database of all possible contour images(B&W) with their image tags, for a given resolution.
By classifying every single image possible for the resolution, I want to ...
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Classical capacity of the quantum bitflip channel
I'm looking for references or a derivation for the classical capacity of the quantum bitflip channel,
$$\mathcal{N}(\rho) = (1-p)\rho + pX\rho X.$$
Or if this is not known, are some other quantities ...
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What are the quantum algorithms available for Monte Carlo sampling?
What are the quantum algorithms available for performing Monte Carlo sampling. Is there any implementation of these algorithms. Any kind of resources would be helpful
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Online resource to troubleshoot issues with my personal project
I am currently working on my own quantum conventional neural network as a project to enhance my learning. However, I have reached a dead end where my code was successfully working, but after ...
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How are quantum algorithms devised?
This is a soft question, but I find it to be a very pertinent one...
Algorithms for Grover's search and Simon's problems seem to come completely out of the blue, and I find it very hard to understand ...
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References for homology, suitable as background for quantum codes
Quantum codes are often related to the concepts in homology, such as chain complexes.
Is there an introduction to homology suitable for building a strong understanding of these results?
I am looking ...
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What are reviews on the search for good quantum LDPC codes?
Can anyone provide a link for an up-to-date review of the current situation in researching good quantum LDPC codes and prospects?
I am interested in questions like:
Does the quantum computing ...
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Diamond norm distances between some channel and the identity
I'm currently working with the continuity result by Kretschmann-Schlingemann-Werner (arXiv version) for Stinespring isometries (more precisely, the following corollary to their result, cf. Appendix C ...
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Is there any recent review on the state of the art of NMR quantum computing?
Is there any recent review on the state of the art NMR quantum computing? there are some reviews but they are not complete. for example does not give the data for the gate times and so on.
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Exploiting virtual-$Z_{\theta}$ corrections in QEC
The work done by IBM Researchers to perform virtual-$Z_{\theta}$ gates allowed them to:
achieving zero-time relative phase shifts;
correcting $Z_{\phi}$ errors occurring when applying some gates -- e....
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Is the LOCC-assisted quantum channel capacity of a degradable quantum channel additive?
The LOCC-assisted quantum channel capacity refers to the maximum rate of faithful quantum information transmission through the channel when classical communications and local operations are also ...
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what is square root of a density matrix power two?
I know that in algebra for a variable we have
$ \sqrt {x^2} = |x|$
What if $x$ is a density matrix?
Please share resource for your answer.
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Where can I find tutorials on quantum variational algorithms?
I am interested in learning about quantum algorithms, especially quantum variational algorithms. I would like to know where I can find resources that delve into specific quantum variational algorithms ...
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Proofs that lattice surgery does what it claims to do
I'm interested in making a little list of papers that include a proof that lattice surgery really does what it claims to do; namely, performs a pairwise logical measurement. The original paper (http://...
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Is there a polynomial time mapping from 'Grover States' to an orthonormal set of vectors
Grover's algorithm solves the problem of 'Quantum Search' which I will describe below:
Given some oracle, $O_f$, such that $O_f | x \rangle = (-1)^{f(x)} | x \rangle$, find a value of $x$ such that $...
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What are good pedagogical introductions to entanglement distillation?
I have a basic understanding of what entanglement distillation entails, up to the typical subspace projection protocol described in Nielsen & Chuang, and I would like to read more on the subject. ...
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What is known about the 'structure' of the solution for Graph Isomorphism on quantum computers?
It is thought that Graph Isomorphism, at least the HSP with the symmetric group, is unsolvable on quantum computers. This is a case of the non-abelian HSP.
But if a solution to this problem were to ...
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Recent experimental demonstrations of variational quantum algorithms?
I am interested in the recent experimental demonstrations of variational quantum algorithms.
Can someone please provide me with a list of references of recent experimental demonstrations of ...
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Portfolio optimization via quantum Zeno dynamics in Qiskit
Recently, I came across paper Portfolio Optimization via Quantum Zeno Dynamics on a Quantum Processor. In the paper, a new approach to optimization with QAOA is introduced. Instead of employing a ...
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Is there an interactive coding platform for learning quantum computing (like DataCamp, but for quantum computing)?
Is there an interactive coding platform for learning quantum computing (like DataCamp, but for quantum computing)?
With DataCamp, after each new concept, it gives you a window with incomplete code for ...
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Quantum and DNA computing
Recently I came across the article Associative Quantum Memory. In the article, the authors discussed early physical implementation of quantum computers with NMR. In particular, NMR implementation used ...
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How could compiler optimisations be used with fault-tolerant quantum circuits?
It is fairly well known that in a NISQ context you can often boost the fidelity of your quantum circuit by reducing the gate count and depth of your circuit. For example you can use the KAK ...
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Detailed references on Quantum Principal Component Analysis
I am looking for review articles and other online resources on qPCA based on Lloyd's original proposal. I have found the original source to be slightly hand-wavy with the details so I am having ...
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Threshold estimate for 7-qubit code with flag-qubit syndrome extraction
I am looking for a paper where the threshold for 7-qubit code having a syndrome extraction based on flag qubits has been done.
In the original paper about flag qubits, there is an estimation of pseudo-...
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analyze entanglement of a multipartite state via its reduced two-qubit states
I want resources about entanglement of multipartite states where the author analyzes entanglement of all possible reduced two-qubit states for that.
for example suppose the below state
$$|w\rangle = a|...
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Is there any error correction experimental set-up based on stationary-flying hybrid systems?
In a former question of mine I asked to detail the functioning of a photonic based set-up encoding a quantum state within a Shor code.
I would like to be updated on the eventual existence of any ...
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Has the optimality of Grover's algorithm be proven in the standard oracle case?
While answering this question, I stumbled upon the fact that the only proof I knew of the optimality of Grover's algorithm (that is, Zalka's one) uses a phase oracle. I know that a phase oracle can be ...
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Text book recommendations for QM 101, please? Not a complete beginner
I have a BS in Physics, I've completed my studies many years ago, but not in English. I've worked in the computer industry meanwhile (my coding background is solid). Recently I've completed an MS in ...
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Is there any Q1 journal for quantum computing that is free for authors?
I know there are some good journals that accept quantum computing articles, but unfortunately they charge authors a fee.
Are there any Q1 journals in this field which don't charge authors?
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Python implementation of Matthew Hastings' Tensor PCA algorithm
Is there any publicly available implementation of the algorithm presented in the paper Classical and Quantum Algorithms for Tensor Principal
Component Analysis by Hastings?
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Survey of which 'physically interesting' many-body states can be efficiently prepared on a quantum computer?
For digital quantum simulation of many-body problems, efficiently preparing an initial state of 'physical interest' (e.g. ground states, thermal states, topologically ordered states etc.) is very ...
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Is it known whether the Fermi-Hubbard ground state can be prepared efficiently or not?
Naturally, in general, ground state preparation is QMA-complete. There exists a paper by Andrew Childs, David Gosset & Zak Webb, which shows that ground state preparation for the Bose-Hubbard ...
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Best free online application for making notes containing quantum computing math notation? [closed]
This I hope, is not a trivial question. I am sure many like me struggle while making personal notes online and face difficulty in write linear algebra expressions & Dirac notations to explain ...
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Are there open source implementations of quantum error correction decoders?
To detect and correct for errors in a topological quantum memory (toric code for example) one needs a quantum error correction algorithm also known as decoder.
The minimum weight perfect matching (...
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Open source color code decoder
Is there an open source color code decoder available somewhere?
For the surface code there's pymatching, for the color code there's...?
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References that use trace distance to calculate quality of teleportation
State fidelity is the most used measure to compute similarity of input and output states in articles dealing with a quantum teleportation.
For my research, I would like to know whether are there ...
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Applications of Quantum Principal Component Analysis
I have been reading Seth Lloyd's paper on Quantum Principal Component Analysis and while there is a short discussion that points to possible applications, I am having a hard time seeing the advantage ...
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Clarification on state prep for quantum phase estimation
I have a question about how to prepare a state $|\psi\rangle$ for quantum phase estimation (QPE). My question is about whether the state prepared in QPE has to be the exact eigenstate of the operator ...
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Algorithms in Continuous Variable Quantum Computing
I have recently been exploring Continuous Variable Quantum Computing. I would like to know if there are any resources or literature I can read to get a general understanding of how one can extend ...
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Density matrices of multiples copies of a single Haar-Random state
In Pseudorandom States, Non-Cloning Theorems and Quantum Money, the authors state that:
Let $\rho_\mu^m$ be the density matrix of a random $|\psi\rangle^{\otimes m}$ for $|\psi\rangle$ chosen from ...
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Where can I find a comprehensive list of gate decompositions used by transpilers?
Does anyone know of a web site, paper etc. that has a list of "gate decompositions" e.g. the kind of decompositions that occur when the transpiler decomposes non-native gates to native gates....
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What are the career prospects after studying Quantum Computing? [closed]
I know that this question may be considered "personal" or "career related", but I'll try to make it as general as possible, to make it useful to other people that may find in the ...
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Who first introduced the mathematical definition of entanglement?
I know the definition of entangled state and separable state from Wikipedia, but I can't find the references that brought up the mathematical description of the entangled state and separable state. Is ...
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What is the original reference for the Hadamard test?
The Hadamard test is a widely used routine in quantum computing to compute the real and imaginary part of expectation values of unitary operators. However, all papers I have come across in the ...
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Graph Limits in Quantum Computing
Lovasz's book Large networks and Graph Limits mentions that their study of graph limits is motivatived applications to quantum computers, statistical physics, and models for the internet. They don't ...
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How is Pauli twirling applied to a noisy gate in practice?
My understanding of Pauli Twirling mainly comes from this paper. Please, correct me if I am wrong in any part of my explanation.
General idea of Pauli twirling
The idea of Pauli Twirling is the ...
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