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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Can quantum entanglement be expressed in terms of knot theory?

While writing this answer I was wondering whether the analogy of the nature of entanglement in the GHZ state with Borromean rings is more than a mere analogy (cf. Aaronson's lecture). The question ...
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5answers
991 views

Resources to study quantum algorithms and quantum complexity

I have a computer science background, and I'm interested in studying 'quantum algorithms' and anything that is related like 'quantum complexity'. I would like to have all important resources that is ...
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How many types of quantum computers are currently being researched? [duplicate]

I came across a "new" type of quantum computer - photonic quantum computing. Is this type of technology of interest here? You may read about an example here. I wonder how many types of quantum ...
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1answer
31 views

Algorithm to approximate Chaitin's Constant?

I'm searching for a good quantum algorithm to approximate Chaitin's Constant. Any references/resources will do? Note: This number is uncomputable.
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1answer
67 views

Why does representation theory often arise in the context of quantum algorithms for the hidden subgroup problem?

I noticed that approaches for finding quantum algorithms the hidden subgroup problem for both Abelian groups ($(\Bbb Z_n\times \Bbb Z_n, +)$, $(\Bbb R, +)$, etc.) and non-Abelian finite groups like ...
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2answers
98 views

Pennylane and Qiskit for quantum machine learning

I'm interested in quantum computing, specifically in “quantum machine learning” (QML). I'm going to start my masters program in computer science and have previous experience in classical machine ...
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History of quantum programming

Do any articles or books cover the beginnings of quantum programming and recent developments, rather than a list of Q languages and not mixed with broader quantum computing/hardware milestones? I ...
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1answer
57 views

Intro to quantum computing for programmers [duplicate]

I'm looking for an entrypoint to learning about quantum computing to which I'm exposed only by popular science articles and some qiskit materials so far. I understand that it's entirely possible that ...
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41 views

Resources detailing quantum research

Are there sites that detail different areas of quantum computing research? How can I identify different areas to explore?
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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 ...
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31 views

Academic journals dedicated to quantum algorithms

Are there, any journals out there that have been steadily publishing, or are dedicated to, research on existing or new and innovative quantum algorithms? Generalist titles are fine, but they can also ...
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47 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 $...
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1answer
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Is there any tool for generating Hamiltonian for circuit-QED?

There are tools like qutip helping you to simulate a given Hamiltonian. However, I am wondering is there any tool/library or something that takes e.g. a graph (G, V, E) of qubits and resonators, and ...
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1answer
90 views

Could second quantisation and QFT become a problem when scaling up quantum computers?

So I was wondering about the following: I can encode an algorithm in position $\hat x$ in quantum mechanics. However, in QFT position is not an operator it becomes a parameter $x$. Has anyone ...
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42 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. If ...
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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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1answer
123 views

What does W stand for in the W entangled state?

For the $|W_3\rangle=\frac{1}{\sqrt{3}}(|001\rangle+|010\rangle+|100\rangle)$, what does W stand for? Does it refer to an author name? Anyone knows a reference? Thanks
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1answer
69 views

Resources in Spanish to start learning quantum computing and quantum programming (Qiskit)

I’m starting an engineering degree in computer systems and I’m starting to get really interested in quantum computing. First of all, I don’t know where or how to start and I would really like to learn ...
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1answer
62 views

What is the seminal reference for quantum computing? [closed]

If someone wanted to pinpoint the seminal reference on the subject of quantum computing, what would it be? Thanks.
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3answers
160 views

How do I start as a quantum computing programmer?

How do I learn Q#? What languages should I know prior to learning Q#? How do I get started with quantum computing?
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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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1answer
97 views

Looking for papers that are pessimistic about the feasibility of a quantum computer

I'm actually searching two types of documents (could be the same): 1) A synthesis about all the main gap/problems that make the physical realisation of a quantum computer actually infeasible. 2) ...
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1answer
157 views

Number of Qubits Required for Simulation of Caffeine and Penicillin Molecules

I recently read this report from BCG, which stated: For scientists trying to design a compound that will attach itself to, and modify, a target disease pathway, the critical first step is to ...
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8answers
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Is my background sufficient to start quantum computing?

I am a first-year undergraduate electrical engineering student. I want to study quantum computing and quantum AI in the future and also possibly work on building quantum computers. I have finished ...
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Are there any Quantum Computing degrees in Germany, Quebec, or The USA? [closed]

I am an Electrical and Computer Engineering student from Egypt and was considering venturing into the realm of Quantum Computing. I really want to take part in the next info revolution and I have ...
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1answer
31 views

Getting started with quantum computing from a computer science perspective [duplicate]

I started this book on quantum computing (Nielsen and Chuang). I have gone through the first chapter but I need to really understand the concepts; what should I do? Should I cover some background ...
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32 views

Superdense coding projects

I have recently been studying quantum computing specially the cryptographic aspects of it. The books I followed is Nielsen and Chuang, and a book named Quantum Computing Explained by David McMohan. ...
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1answer
91 views

Quantum Computing Project Inquiry [duplicate]

I am wondering if there is a way to get advice\feedback here about the following: I am about to start a MS physics program. I am interested in quantum computing and my department has the option of ...
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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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1answer
44 views

Primer for learning about quantum circuits simulating systems

I am interested in a couple of books or arXiv links to learn how to develop quantum circuits for the purpose of simulating quantum multi-body systems. Moreover, I am interested in learning how to ...
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1answer
110 views

What is the definition of Bell state on a n-qubit system?

Question 1: The bell state for a 2-qubit system has been defined in Neilsen and Chuang's book as the set of maximally entangled states spanned by $\{|00\rangle + |11\rangle, |00\rangle - |11\rangle, |...
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IBM Q devices' hardware/resource constraints

I tried to look for the resource constraints but so far haven't been able to find them. They are not present in the GitHub repository that usually provides the hardware information for the different ...
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3answers
564 views

How to quickly calculate the custom U3 gate parameters $\theta, \phi$ and $\lambda$ for any unitary?

In IBM Qiskit and Quantum Experience, the custom U3 gate is defined as $$ U(\theta, \phi, \lambda) = \begin{pmatrix} \cos\left(\frac{\theta}{2}\right) & -e^{...
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1answer
196 views

What are the basics needed to learn quantum computing?

I was very inspired by Michio Kaku's explanation on the possibilities of quantum computing and also listening to Talia Gershon's talk on it. As I come from a business & analytics background, ...
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2answers
522 views

Is there any online Bloch sphere simulator?

While writing this answer I realized it would be really helpful if I could show the OP a video or .gif of how qubit states in Bloch spheres transform under certain unitary operations. I googled up a ...
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1answer
400 views

How to understand the Haar measure from a quantum information perspective?

I found it a little difficult to understand it using Wikipedia and some mathematical documents. How to understand the Haar measure from a quantum information theory perspective? Are there any ...
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48 views

References on quantum arithmetic circuit complexity

In classical computing, arithmetic circuit complexity is apparently a big topic. But I couldn't find much about the complexity of quantum arithmetic circuits. Almost all references like arXiv:1805....
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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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2answers
163 views

Resources for quantum computing which do not use Dirac notation

What are some introductory textbooks and resources on quantum computing that do not use Dirac-notation, but rather ordinary mathematical notation (i.e. the notation used by mathematicians to represent ...
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2answers
209 views

Why can't a quantum computer strongly simulate itself?

We can strongly simulate a quantum circuit if we can estimate the probability of measuring $|0^n\rangle$, say, at the end to within some fixed relative error. Now, by measurement, a quantum ...
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Is there a list of accessible open problems in quantum computing from a theoretical computer science perspective?

(Classical) theoretical computer science (TCS) has a number of outstanding open problems that can easily be instantiated in a manner that is accessible to a wider general public. For example, ...
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1answer
136 views

What can be a mini research project based on Grover's algorithm or the Deutsch Jozsa algorithm?

I need to work out a research project on quantum computing as a part of my curriculum. I was wondering how to implement something theoretically with the basic knowledge I have. I have learned about ...
3
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1answer
69 views

Clarifying the relationship of the probabilities of depolarizing channel and relaxation/dephasing times

I am reading the paper Duality of Quantum and Classical Error Correction Codes: Design Principles & Examples and at the beginning of it, the authors describe how the general Pauli channel is ...
3
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1answer
80 views

Estimating the depolarizing probability of depolarizing channels

When considering quantum error correction over depolarizing channels, the depolarizing probability $p$ such that an error of the kind $X,Y,Z$ will happen is used as a priori information in order to ...
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1answer
50 views

How does Steane code use the classical Hamming code for error correction?

I know what the Hamming code is. But I don't understand how could this idea be applied in quantum computation since it's required to cover the case of superposition and entanglement. How could you ...
3
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1answer
179 views

What language is more suitable for quantum machine learning algorithms?

What language is more suitable for quantum machine learning algorithms? Is it right that it's Python + Pyquil? Or something else? And do you know the sources where you can see the sample codes of ...
2
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1answer
61 views

Is there a place online where I can catch up with all the notational syntax associated with quantum computing?

There is a vast amount of new notations which would be new even to Ph.D. in math. How on Earth can I catch up with all of this? Is there a place online which is devoted to the QC syntax? I would ...
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2answers
103 views

Chronological list of improvements in number of logical qubits

Was wondering if anyone has any historical data/charts showing the number of over logical qubits over time. I am hoping to include something illustrative of Moore's law as applied to quantum computing ...
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1answer
280 views

What resources are available for learning QCL?

I'm struggling to find much about the language QCL, rather than about quantum computing itself. Is there anything out there like that? It doesn't have to be free.
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Reference that explains how to read 3d topological diagrams for surface code computations

I like making diagrams to describe computations. For the surface code, an excellent tool is 3d topological diagrams. Here is an example diagram (made by me in SketchUp): The basic idea is that white ...