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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Document pessimism 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
43 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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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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69 views

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
20 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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29 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
72 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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34 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 ...
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1answer
41 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
92 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
192 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
137 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
194 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
227 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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40 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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149 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
195 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
106 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 ...
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1answer
67 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 ...
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1answer
68 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
42 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 ...
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1answer
111 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 ...
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1answer
60 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
50 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
165 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 ...
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1answer
271 views

Path to learn Qiskit as a tool for the future

I am an undergraduate in Engineering physics, yet to take classes on Quantum mechanics, but none (if I'm not mistaken) on quantum information and quantum algorithms, and I am curious about the subject ...
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2answers
202 views

Resources for learning quantum computing from an undergraduate physics perspective

I am a physics and math undergraduate and I want to learn quantum computing mainly I want to try doing research. Are there any resources online courses or books or websites? I not familiar with the ...
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1answer
54 views

Implementing BB84 protocol with easily-obtained consumer hardware

Following on from my question on educational quantum computing toys, I was wondering whether it is possible to implement the BB84 key distribution protocol with easily-obtained consumer hardware - ...
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1answer
105 views

Quantum Nimber Maths

I am interested in quantum combinatorial games. According to the Wikipedia page on the Sprague-Grundy theorem: Every impartial game under the normal play convention is equivalent to a nimber ...
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3answers
299 views

Classical complexity for Simon's problem

Simon's problem is that you are given a function $f : \{0,1\}^n \to \{0,1\}^n$ such that $f(x)=f(y)$ if and only if $x \bigoplus y$ is either $0^n$ or some unknown $s$. The problem is to find $s$. If $...
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2answers
154 views

Are there emulators for quantum networks?

Inspired by the question Are there emulators for quantum computers?, I'm curious to know if it's possible to emulate a quantum network on a classic computer. Additionally, is it possible to emulate a ...
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2answers
103 views

Time-bin encoding qudits

Time-bin encoding is a technique used in Quantum information science to encode a qubit of information on a photon. Wikipedia Is there a generalization for $n$-th level qudits?
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2answers
181 views

Non-layperson explanation of why a qubit is more useful than a bit?

I have a computer science and mathematics degree and am trying to wrap my head around quantum computing and it just doesn't seem to make sense from the very beginning. I think the problem is the ...
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56 views

Photonic CHSH Games

How can a CHSH game be realized in a photonic circuit?
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59 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, ...
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1answer
87 views

List of known circuits and their expected output

I've written an API which takes in a circuit scaffold, according to some specifications, and outputs the results of simulating the circuit. The circuit constraints are that the measurements are ...
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2answers
180 views

Resources on hybrid quantum-classical algorithms applied to combinatorial optimization problems

I am doing a thesis on "Metaheuristics and Quantum Computing", and was wondering if anyone could recommend some papers/pages to read talking about hybrid quantum/classical computing. (My idea is to ...
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5answers
2k views

Can the Bloch sphere be generalized to two qubits?

The Bloch sphere is a nice visualization of single qubit states. Mathematically, it can be generalized to any number of qubits by means of a high-dimensional hypersphere. But such things are not easy ...
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2answers
747 views

Where do we put error correction code in quantum circuit?

First of all : I am a beginner in quantum computing. I would like to have a resource (or an answer if it is not complicated) explaining where we put the error correction codes in a quantum circuit. ...
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5answers
787 views

Tools for creating quantum circuit diagrams

What tools exist for creating quantum circuit diagrams and exporting them as images? Preferably one which runs in Windows, or even better one which runs in the web browser.
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1answer
109 views

In which paper was the CHSH game first presented?

The CHSH inequality was presented in the paper Proposed Experiment to Test Local Hidden-Variable Theories published in 1969 by J.F. Clauser, M.A. Horne, A. Shimony, and R.A. Holt. I'm interested in ...
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4answers
188 views

Imperfect Quantum Copying

It is known by the no-cloning theorem that constructing a machine that is able to clone an arbitrary quantum state is impossible. However, if the copying is assumed not to be perfect, then universal ...
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2answers
132 views

What are Grassmann-Plucker relations?

In Duality, matroids, qubits, twistors and surreal numbers (recently submitted!) they show that via the Grassmann-Plucker relations, the various apparent unrelated concepts, such as duality, ...
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1answer
83 views

Resources to keep a track on open Ph.D. positions in specific sub-fields/topics of quantum computing

I was wondering where to look for open Ph.D. positions for specific sub-fields/topics of quantum computing like error correction, optimization, quantum chemistry, etc. It is preferable if the offers/...
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3answers
208 views

Do any educational quantum computing toys or devices exist?

Question inspired by this article from IEEE Spectrum on blocks containing different polarization filters for use in classrooms, and my previous question on representing the three-polarizing-filter ...
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1answer
147 views

Introductory resources for learning about quantum Hamiltonians

I am seeking introductory resources which will enable me to answer these questions (textbooks, lecture series, etc.): Given a simple quantum system, how do I derive its Hamiltonian? Given a ...