Questions tagged [resource-request]
For questions that involve a request for resources to learn anything related to quantum computing or quantum information.
59
questions with no upvoted or accepted answers
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Definition of a NISQ device with respect to qubit counts and error rates
How do we define whether a device is a noisy intermediate-scale quantum (NISQ) device with respect to number of qubits and their error rates? Does it make sense to do this? I believe I once saw a ...
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Group theory lecture for quantum information
I am looking for a nice lecture about group theory for quantum information. Ideally a video lecture.
I know some of the very basics as I am familiar with the stabilizer formalism but there are many &...
- 1,142
6
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81
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Photon Entanglement using SPDC
Are there any good references where from I can learn about photon entanglement using spontaneous parametric down-conversion (SPDC)?
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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 ...
5
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Quantum annealing - studies showing empirical evidence for better performance in comparison with classical computers
Currently, it is not known wheter quantum anneling or algorithms like VQE and QAOA for general purpose quantum computers bring about any increase in computational power. However, there are some ...
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Is there recent research on experimental implementations of Grover's algorithm with more than 5 qubits?
I could only find experimental work on Grover's algorithm upto 5 qubits here. Is there any more recent research for larger database sizes where Grover's algorithm is employed? Is there any known ...
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Who first studied nonlocal games with probabilistic predicate?
For some background, a nonlocal game consists of questions $x,y\in X,Y$ and answers $a,b \in A,B$; the pair of questions $x,y$ is asked with probability $\mu(x,y)$, and a referee accepts the pair of ...
- 2,258
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Open problems in quantum algorithms
I am new to the field of quantum algorithms. It is well known that quantum algorithms offer a speedup over classical algorithms in some problems. Regarding the problems in which quantum algorithms ...
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Can anybody explain or suggest a good reference on how to make a modular exponentiation circuit for N=15 with any coprime base?
I have read many papers related to it but in every paper, they just show the circuit of order finding algorithm for N=15, but did not explain what is the procedure to make it.
It will be great if ...
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Quantum Belief Propagation decoding
I have been reading about a family of quantum error correction codes called Quantum Turbo Codes, which are the quantum analog of the well-known classical Turbo codes. This codes were introduced in ...
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Bound on quantum speedups under various models of complexity
What are the bounds on quantum speedups under the various models of complexity? How big or small can they be?
Under the query model, my understanding is that the lower bound is $\Omega(\sqrt{N})$ as ...
- 1,036
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What types of noise are there?
I know this does vary to some extent from implementation to implementation, but I'm looking for broad 'classes' of noise.
For example, I know a very common source of noise/error is the environment - ...
- 3,369
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Active areas of research for NISQ algorithms
What areas of research in NISQ algorithms have heavy focus? I'm interested in quantum chemistry algorithms because of previous work (e.g. VQEs), and I'd love to learn more about other near-term ...
- 1,620
4
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General mixed integer linear programming problem with quantum computers
I was wondering if anyone had a sample code for running a general MILP problem. I saw some coding for some very specific problems and I thought they were kind of far away from what we needed.
$$
\text{...
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Complexity analysis of separability in the multipartite case
It's well known that determining whether a bipartite mixed state is separable or entangled is a $\mathsf{NP}$-hard problem under some accuracy estimates (cf. this TCS SE discussion). Now I'm curious ...
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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 are some standard ways to visualize non-unitary processes
In quantum computing, quantum circuits are a common model for visualizing unitary evolution. If I want to represent a unitary $U$ acting on a $2$-qubit state $|00\rangle$ followed by a measurement in ...
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Are there any detailed designs for Quantum Computing hardware?
I am looking to analyze some quantum hardware designs, preferably superconducting and photonics, but I can't seem to find sources that give some detailed information. Can someone provide me designs ...
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Comparison of matrix inversion algorithms
Since 2009, many matrix inversion algorithms have appeared.
Is there somewhere a table, or recently released overview, comparing the speed of matrix inversion algorithms, like done in this table taken ...
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3
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Does anyone have any really good quantum computing illustration packages or frameworks for visually teaching various aspects of QC?
I'm focusing on training non quantum physics / non math majors - software engineers to be specific (and the interested senior executive that wonders by) and am bewildered by the lack of adequate ...
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How to construct Schur-Weyl decomposition of independent and identically distributed mixed qudit states?
Given a $d$-dimensional Hilbert space $\mathcal{H} \approx \mathbb{C}^{d}$ (i.e. a qudit system) if I have $N$ identical copies of a mixed state I can use Schur-Weyl duality to decompose the state as
$...
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2
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108
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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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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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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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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 ...
- 1,142
2
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39
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References discussing the carbon footprint expected for fault-tolerant quantum computers?
There are many problems regarding the scalability of quantum computers, how we need good quantum error correcting codes that scale well and protect well the logical encodings against many possible ...
- 2,247
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Recommendation for Efficient Lindblad Simulator Packages
Could anyone recommend some efficiently established packages to simulate Lindblad dynamics? I wrote some codes using numpy to solve the vectorized superoperator equation but it's rather slow.
Update: ...
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2
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Is there a resource theory of irreversibility?
We know that we can quantify the degree of irreversibility of a quantum process using the entropy production rate of the same process. But sometimes it seems that the very fact that information has ...
- 2,247
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What are the evidences that quantum simulation have a future?
Here future means orders of improvement which can solve rather different problems e.g. emergent phenomenon.
For example, the first integrated logic only have several transistors, now it have billions ...
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66
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Example of lower bound on spectral gap for adiabatic quantum computing
is there a list of reference for which the authors prove a lower bound of the spectral gap for an adiabatic quantum algorithm? I.e. I am searching for examples where the authors solve a problem with ...
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How to start reading quantum computing papers?
What's the best way to get to a state where you can read quantum computing papers? I find them too dense and full of notation to approach.
I am currently working my way through Nielsen and Chuang's ...
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Where can we find Qiskit exercises solution/answers?
Where can we find Qiskit Exercises solution/answers, is there any website for it?
Or any alternative way to check our answer/solution?
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Software for implementing Quantum Machine Learning
I want to have a software product specifically suited for Quantum Machine Learning. Please help me with a list of software product which has been designed specifically for implementing Quantum Machine ...
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Pointer to related research (paper)
Recently, I was reading a paper (arXiv:1804.03719 [cs.ET]), which had the following quote (the most relevant part has been bolded),
Quantum algorithms are often grouped into number-theory-based, ...
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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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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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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-...
- 1,142
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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|...
- 181
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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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answers
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Simple Maths Operators implementation in Quantum
I am a newbie in quantum programming and trying to learn implementing some simple classical programs in quantum, just as a starting point. The thing I am kind of struggling in is availability of ...
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answer
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Distance of one dimensional quantum error correcting code
Consider one dimensional quantum codes $[[ n,k=0]] $.
One way to describe them is using stabilizer framework with $n$ independent Pauli matrices.
Usually, one considers them in the graph state model ...
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What are channels for which entanglement at the encoder improves communication rates?
In discussing the classical capacity of quantum channels, as e.g. mentioned in Wilde's book (see section 20.6), it is possible that using entanglement at the encoder stage can improve transmission ...
glS♦
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Interesting properties of maps whose natural representation is unitary?
Let $\rho \in L(\mathcal{X})$ be a state in the space of linear operators acting on some complex Hilbert space $\mathcal{X}$. I'm interested in linear maps $\Phi: L(\mathcal{X}) \rightarrow L(\mathcal{...
- 5,770
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Equivalence of Topological Quantum Computing and the Quantum Circuit Model
It is my understanding that topological quantum computers are capable of executing an arbitrary quantum circuit with a polynomial overhead of translating the circuit to the native topological ...
- 505
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Looking for detailed comparisons between photonic vs other quantum hardware
I’m looking for resources or literature that compares photonic devices and other quantum computing hardware using some performance metric. In other words, I am looking for grounds that compare the ...
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How is quantum metrology realized in experiment?
Are there some lists of the method to realize quantum metrology, or rather, utilizing quantum resources to enhance the precision of parameter estimation. The experimental method I've know is listed as ...
- 2,782
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Sidebands in spin-oscillator coupled devices
I am researching spin-oscillator hybrid devices (particularly those coupled to NV centers), and I have come across this paper investigating the strain field of a cantilever and its effect on the NV ...
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Time accuracy required to reconstruct the density matrix?
So usually when you talk to physicists who accept the multi-world interpretation of quantum mechanics they claim that the measurement is reversible if you take into account the worlds we don't observe....
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Paper concerning distributing quantum computation on many small quantum computers
I remember reading a paper that described how a quantum circuit on a large amount of qubits can be simulated by doing many runs on a smaller quantum computer. They used techniques from tensor networks....
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