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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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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 ...
Greenstick's user avatar
  • 1,086
6 votes
0 answers
46 views

Resources on the energy consumption of IBM quantum computers?

I am seeking information regarding the energy consumption of IBM Quantum Computers, specifically inquiring about the energy requirements associated with individual gate operations. Could you also ...
goga suknidze's user avatar
6 votes
0 answers
99 views

Photon Entanglement using SPDC

Are there any good references where from I can learn about photon entanglement using spontaneous parametric down-conversion (SPDC)?
Govind's user avatar
  • 123
5 votes
0 answers
117 views

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 ...
gsrivatsa_marsh's user avatar
5 votes
0 answers
69 views

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 ...
Mateus Araújo's user avatar
5 votes
0 answers
101 views

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 ...
C. Kang's user avatar
  • 1,756
5 votes
0 answers
146 views

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 ...
Omar Ali's user avatar
  • 151
5 votes
0 answers
58 views

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 ...
Sshingh's user avatar
  • 61
5 votes
0 answers
172 views

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 ...
Josu Etxezarreta Martinez's user avatar
4 votes
1 answer
107 views

How do I (MSc in quantum physics) start acquiring quantum programming/simulation skills?

I have finished my Masters in quantum physics, but have always omitted all this programming stuff within my studies. Now, looking for jobs, I realize that this was a mistake since most of the jobs ...
relativeentropy's user avatar
4 votes
0 answers
69 views

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. ...
Bentanglement's user avatar
4 votes
0 answers
426 views

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 ...
Marco Fellous-Asiani's user avatar
4 votes
0 answers
152 views

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 ...
forky40's user avatar
  • 7,123
4 votes
0 answers
65 views

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 ...
Greenstick's user avatar
  • 1,086
4 votes
0 answers
255 views

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 ...
Iskander's user avatar
4 votes
0 answers
103 views

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 - ...
auden's user avatar
  • 3,459
4 votes
0 answers
137 views

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 $...
justmyfault's user avatar
4 votes
0 answers
265 views

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{...
Scientia Systems's user avatar
4 votes
0 answers
47 views

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 ...
Sanchayan Dutta's user avatar
3 votes
0 answers
51 views

Open Source Quantum Algorithm Development projects

Is there a platform where people contribute together to solving tasks in the area of quantum algorithm development?
Lazloo Xp's user avatar
  • 131
3 votes
0 answers
58 views

I would like to know the textbook/paper on hamiltonian for rf-SQUID

I am a graduate student in the Department of Computer Engineering, and I am currently doing research on superconducting quantum computers. In particular, I am focusing on quantum annealing machines ...
Aki's user avatar
  • 31
3 votes
1 answer
159 views

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 ...
Song of Physics's user avatar
3 votes
0 answers
65 views

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 ...
abhobe's user avatar
  • 73
3 votes
0 answers
70 views

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 ...
ProfVersaggi's user avatar
3 votes
0 answers
92 views

Photonic CHSH Games

How can a CHSH game be realized in a photonic circuit?
user820789's user avatar
  • 3,312
2 votes
0 answers
22 views

Graph coloring optimization with quantum computing

I'm a computer science student at the University of Geneva, currently working on my bachelor thesis. My project involves conducting a significant optimization task on graph coloring using quantum ...
Leo Pellandini's user avatar
2 votes
0 answers
43 views

Stabilizer codes with no "pure" stabilizers

For all stabilizer codes, we can represent its stabilizer generators using a standard form $$ H = \left(\begin{array}{ccc|ccc} I & A_1 & A_2 & B & 0 & C \\ 0 & 0 & 0 &...
Yunzhe's user avatar
  • 741
2 votes
0 answers
29 views

Procedures for fault-tolerant nondestructive logical measurements

Definition 2 on page 20 in Daniel Gottesman's An Introduction to Quantum Error Correction and Fault-Tolerant Quantum Computation states that a nondestructive logical measurement procedure is fault ...
Peter-Jan's user avatar
  • 1,549
2 votes
0 answers
38 views

Derivation of energy gap formula for adiabatic Grover algorithm

I am having a difficulty in finding the full derivation for local search energy gap, as described in In the adiabatic version of Grover's algorithm, how is the Hamiltonian constructed?. I looked ...
Paulske's user avatar
  • 457
2 votes
0 answers
30 views

Recent references establishing connections between stabilizer error correction and entanglement distillation procedures

I know some concrete entanglement distillation protocols (from this review). I also know there are connections between error-correction codes and entanglement distillation (again this review but also ...
Marco Fellous-Asiani's user avatar
2 votes
0 answers
57 views

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 ...
Wolfman Jack's user avatar
2 votes
0 answers
40 views

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....
Daniele Cuomo's user avatar
2 votes
0 answers
25 views

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 ...
Daniele Cuomo's user avatar
2 votes
0 answers
57 views

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 ...
reza's user avatar
  • 733
2 votes
0 answers
45 views

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 ...
R.W's user avatar
  • 2,347
2 votes
0 answers
68 views

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 ...
aneela's user avatar
  • 233
2 votes
0 answers
38 views

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's user avatar
  • 25.4k
2 votes
0 answers
74 views

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: ...
Will Yang's user avatar
  • 177
2 votes
0 answers
39 views

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 ...
R.W's user avatar
  • 2,347
2 votes
0 answers
61 views

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 ...
jw_'s user avatar
  • 171
2 votes
0 answers
77 views

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 ...
asdf's user avatar
  • 503
2 votes
0 answers
115 views

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 ...
snickers_stickers's user avatar
2 votes
0 answers
2k views

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?
akash jain's user avatar
2 votes
0 answers
80 views

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 ...
Ashish's user avatar
  • 285
2 votes
0 answers
86 views

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, ...
Arthur-1's user avatar
  • 525
1 vote
0 answers
58 views

Most relevant conference for Quantum Computing

I will have to supervise a PhD on Quantum Computing for Optimization problems. In this respect, I would like to attend to a conference on Quantum Computing, so as to get a clear view of the most ...
deb2014's user avatar
  • 171
1 vote
1 answer
54 views

Is there an up-to-date programming reference for qiskit?

Every example of code for qiskit that I've seen has one or more commands that don't work out of the box. Even the way to verify that qiskit is installed from qiskit.org failed. I've managed to either ...
Robert Megee's user avatar
1 vote
0 answers
28 views

Who is currently working on coherent Ising machines (classical analog devices)?

Can you share some papers on that subject? Review papers would be highly appreciated. What are limitations in terms of connectivity between different spins?
sycramore's user avatar
  • 325
1 vote
0 answers
69 views

Quantum circuits with only $\{CNOT, H\}$

The Clifford circuit contains $\{CNOT, H, S\}$. I wonder, is there any paper that studied the quantum circuit only with $\{CNOT, H\}$? What's the name of this gate set?
劉承瀚's user avatar
1 vote
0 answers
58 views

Generalization of representing SU(2) as quaternions

I am familiar with the isomorphism between $SU(2)$ and the unit quaternions, and the group homomorphism from them to $SO(3)$. I am interested in knowing if there is a generalization for $SU(2^n)$. My ...
Chris Henson's user avatar