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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.

4
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2answers
166 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 ...
7
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0answers
154 views

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, ...
0
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1answer
80 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
46 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
votes
1answer
40 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 ...
2
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1answer
31 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 ...
1
vote
1answer
75 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 ...
1
vote
1answer
56 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 ...
2
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2answers
39 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 ...
5
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1answer
91 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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0answers
47 views

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 ...
3
votes
1answer
138 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 ...
2
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2answers
117 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 ...
1
vote
1answer
42 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 - ...
0
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1answer
100 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 ...
3
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3answers
212 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 $...
2
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2answers
138 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 ...
3
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2answers
92 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?
2
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2answers
142 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 ...
2
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0answers
52 views

Photonic CHSH Games

How can a CHSH game be realized in a photonic circuit?
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0answers
52 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, ...
2
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1answer
79 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 ...
5
votes
2answers
138 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 ...
13
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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 ...
10
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2answers
720 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. ...
7
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5answers
525 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.
4
votes
1answer
100 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 ...
11
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4answers
159 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 ...
2
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2answers
123 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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vote
1answer
81 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/...
9
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3answers
198 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 ...
4
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1answer
130 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 ...
4
votes
1answer
22 views

Experimental Realization of Superactivation of Quantum Capacity

The superactivation of quantum capacity is an effect that some quantum channels present such that is two of those channels with zero capacity are combined, a non-zero channel capacity can be achieved ...
8
votes
2answers
171 views

Geometry of qutrit and Gell-Mann matrices

I need some useful sources about the geometry of qutrit. Specifically related to the Gell-Mann matrix representation.
4
votes
2answers
62 views

EA-Turbo simulation package

I am working with the quantum turbo codes presented in this paper by Wilde, Hsieh and Babar, and it is claimed that a package to simulate such codes is available at ea-turbo. However, the hyperlink to ...
4
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1answer
60 views

Quantum Computing Research Papers, on puzzles or game theory

Are there any research papers focused on implementing a game/puzzle or game theory in Quantum Computing.
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3answers
131 views

Generalization for $n$ quantum teleportations

In Breaking Down the Quantum Swap, it is stated: Thanks to the CNOT, we can implement a xor-swap on a quantum computer. All we need to do is chain three CNOTs back and forth. In a comment to a ...
7
votes
1answer
91 views

What good references would you recommend to understand the (continuous-variable) CV model of computation?

If you have good references about the CV model that are understandable from a computer science background, that would be great. If they include numerical examples, that would even be better.
4
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0answers
45 views

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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0answers
97 views

What are Tensor Networks and which is the relationship they have with quantum computing?

I have been active in this community a while and I repeatedly see questions and answers referring to the so-called Tensor Networks. That makes me wonder what are those elements are and what the ...
10
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2answers
240 views

State of the art gate speeds and decoherence times

I am interested in the state of the art gate speeds and decoherence times for the qubit types I know are being pursued by companies presently: superconducting qubits, ion trap qubits, photonic qubits....
4
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4answers
300 views

How to re-create the following circuit image?

What would be the best way to re-create the following image of the HHL quantum circuit without compromising on image quality (the image is from this review paper)? Using qasm2circ I can create the ...
5
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2answers
213 views

What exactly are “quantum rotors”?

The Wikipedia entry on the subject is rather short. I am also curious about generalizations of quantum rotors in n-dimensions. An introductory explanation with at least one resource for further ...
5
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0answers
73 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 ...
10
votes
3answers
271 views

Is quantum computing mature enough for a computer scientist with no physics background?

Sligthly related to this question, but not the same. Traditional computer science requires no physics knowledge for a computer scientist to be able to research and make progress in the field. Of ...
3
votes
2answers
65 views

Combining Different Qunits

Has any work been done on quantum systems which use a combination of types of qunits (eg. using qubits & qutrits simultaneously)? If work has been done, what kind of work has been done? (eg. in ...
6
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1answer
84 views

Resources for quantum biology

Are there any books, courses, tutorials, etc. for studying quantum biology? Preferably they provide some introduction/primer on the relevant quantum aspects of the quantum biological systems being ...
6
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2answers
162 views

Is there a tool that can give you the unitary representing a quantum circuit from just a string?

Say I have a string representing the operations of a quantum circuit. I want to have the unitary operator representing it. Is there a tool for doing so in Python or else?
8
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2answers
120 views

Resources for Quantum Communication Complexity

I recently came to know about this interesting topic of "communication complexity". In simple words, Wikipedia defines it as: In theoretical computer science, communication complexity studies the ...
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0answers
58 views

Any tips on where to start learning quantum computing? [duplicate]

I am very interested in this field right now, due to the quantum advantage and would like some helpful nudges in the right direction i.e. where should I start from. P.S: I have some background in ...