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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50 views

What are the getting-started-resources for quantum finance? [closed]

What are suitable books, websites or learning material you can advice to get started with quantum finance?
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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 ...
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124 views

Review paper on depth, qubits and $T$ gates number on Clifford+T decomposition for various "typical" algorithms

My question I am looking for some review paper, or a list of different papers providing concrete numbers about the depth, number of qubits and number of $T$ gates required on the Clifford+T basis for ...
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2answers
38 views

Optimal decompositions of some standard multi-qubit gates

To have a concrete example in mind: 3-qubit Toffoli gate can be decomposed into 6 $CNOT$s as shown here I believe this is the most economic decomposition in terms of the number of $CNOT$s used. My ...
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1answer
67 views

What are the problems of linear inversion quantum state tomography?

Consider the following general formulation of the standard quantum state tomography problem: given an unknown state $\rho$, a set of (known) observables $\{\mathcal O_k\}_k$ (generally the elements of ...
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1answer
106 views

Major Security proofs available for Device-Independent QKD

I've lately started working on a DI-QKD project. I've started looking into Vazirani and Vidick's PRL paper on Device-Independent QKD security proof. It's proving to be quite time-consuming for me to ...
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1answer
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Resources for QRAM implemented as a subroutine for quantum algorithm

I am currently working on a project on a higher version of amplitude amplification and for that we want to store the initial state (which will be some sort of superposition) into a QRAM. Now we want ...
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Papers explaining how to use ShiftPhase(theta) instruction in Qiskit

When dealing with the energy states, if we apply a rotation in 0-1 space it will affect the space of 1-2 and contrary. However, I am lacking documents about this phase change between these spaces and ...
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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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What are introductory resources to learn about quantum computing hardware?

I am interested in learning some details of quantum computers inner working, what are the limitation etc. in order to understand quantum computation more. Can some one refer me to some good materials ...
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1answer
42 views

References about deriving the complexity of a given algorithm

Trying to learn about how to derive (& intuition) the complexity for a given algorithm as shown below. If there is any good reference or starting point that anyone can suggest that will be highly ...
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1answer
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Do individual qubits on IBM quantum processors share the same control unit?

I want to investigate the maximum possible parallelism of quantum operations on a specific IBM device (such as the latest heavy-hex architecture), which requires a basic knowledge of their control ...
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1answer
42 views

Pros/cons of the different schemes to have complete fault-tolerant gatesets

I am interested to have references and comment about pro/cons of the various methods that are used to implement complete gateset in a fault tolerant manner. Usually the Clifford operations have a ...
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1answer
60 views

Good references to learn magic state distillation for fault tolerance

I need to learn magic state distillation procedure and their application to fault-tolerance. One of the original paper on this subject is the following: https://arxiv.org/pdf/quant-ph/0403025.pdf I am ...
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1answer
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Resources for QML hackathon/textbook types of questions

I'm looking for a list of resources (links, videos, lectures, etc.) that contains quantum machine learning problems. These could be of the style of problem sets, hackathon questions, questions from a ...
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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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1answer
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How to get information about 'qubit location' or 'variable of qubit location' in qiskit docs?

I have something problem with using qiskit. I searched several qiskit docs to get 'qubit location' or 'variables' that represent qubit. I searched three documents below. ...
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1answer
46 views

What are QHT, QWT and QFT?

I am new to quantum computing. I am not able to understand QHT, QWT and QFT. I tried searching for a suitable material but still could not find them. It would be great if someone can explain and also ...
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1answer
47 views

Comparing technical limitations of major quantum computing approaches

As far as I know, major quantum computing approaches include superconducting qubits, trapped ions, nuclear magnetic resonance qubits, and free space quantum optics. I guess two main technical ...
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Are all computational resources reducible to the time resource?

It's well known that in most (if not all?) computations you can trade time and space resources. An extreme example might be creating an infinitely large lookup table of all composites produced from ...
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Is every single-qubit unitary just a rotation around some unit vector on the Bloch sphere?

I remember reading this somewhere... Is there an elegant proof for this?
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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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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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1answer
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Paper references on how quantum algorithms have an impact on cryptography?

Could you please help me in finding some research paper references on the impact of Quantum algorithms on symmetric and asymmetric cryptography ? Also, I request if I can get some references or notes ...
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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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1answer
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How do the extra energy levels of a transmon qubit affect computation/fidelity?

I was reading about transmon qubits, and I know that they are not true two-level systems. Are there any math/papers which talk about how those extra energy levels affect the computation? I'm assuming ...
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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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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 ...
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List of problems that can be reduced to finding the ground state of a Hamiltonian

I'm doing some reading into Variational Quantum Eigensolvers (VQEs), Quantum Approximate Optimization Algorithms (QAOAs), and other similar algorithms. I know that the point is to find the ground ...
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Is there any firm evidence that quantum computers can be more powerful than classical? [closed]

I am new to the field and I am very confused about the status of things right now. Sorry, but this confusion also spills into the framing of my questions. First, a more CS-style question. As far as I ...
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1answer
203 views

Quantum capacity for serial composition of quantum channels

Recently, I have been working with quantum channel capacity for quantum-quantum channels and I was wondering if there exist some results for channel compositions. Specifically, I have been looking for ...
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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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Recommended resources for starter in quantum computing and its eventual applications on machine learning [duplicate]

A growing interest in Quantum Computing -particularly in its eventual applications on Machine Learning- has taken over me and I would like to follow that path. I have strong Maths (Calculus, ...
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2answers
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Question about understanding quantum computing and its usage and theory behind

I am just wondering if I am interested in quantum computing, but not able to get into engineering. Will I be able to acquire knowledge of quantum computing by for example taking courses in physics and ...
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1answer
73 views

Are multi-qubit control RX gates scaling exponentially?

In https://arxiv.org/pdf/quant-ph/0303063.pdf it a method shown for implementing a multi-qubit controlled phase shift gate thath scales exponentially with n. Are there new methods to implement these ...
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2answers
372 views

Does IBM have a publicly available tutorial on applied quantum computing and how does one use it? Any Reviews of the Tutorial?

I found this link and I am wondering if anyone has used it to learn or develop applications? I would like to know if people find it worth the time. I am reading the material by the way. https://...
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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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3answers
72 views

Quantum Error Correction implementation in Qiskit, OpenQASM or other languages based on Python

Where can we find example(s) of implementation code in a programming language of Quantum Error Correction, whether with the standard method of measurement or the automatic method without measurement (...
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2answers
87 views

Sources for quantum cryptography and post quantum cryptography

I am a beginner in quantum computing, and I understand the basics of quantum computing. Can anyone suggest me a beginners material for quantum cryptography and post quantum cryptography? Book, Video ...
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3answers
177 views

What is a good video resource for quantum computing?

Can anyone refer me to a good video resource for quantum computing? I found this post helpful Currently, what are the best structured courses available online on quantum computing?, but Vazirani's ...
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1answer
88 views

What is a good program to practice using a quantum algorithm? Should I use Cirq or Qiskit?

I am starting to learn about Quantum Computers and Quantum Algorithms. I also started reading about Qiskit and Cirq. I really like learning about them and hopefully I can be a Software Engineer with ...
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1answer
45 views

Simulating QPE + Grover using Low-Rank Stabilizer Decomposition

I want to simulate a 40-45 Qubit circuit that applies Grover + QPE. I've tried running a simulation on qiskit but can't really go past 18 qubits on my machine. As an alternative, I've been reading ...
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1answer
72 views

Does anyone know of any good books to learn about the electronics/electrical engineering side of quantum computing?

I am a Physics student that just entered the field of quantum computing. I am obviously lacking in the electronic engineering side of things and would love to learn more! Any advice for good books?
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1answer
173 views

implement variational quantum eigensolver with openfermion

Can someone provide me with an example about how to implement VQE with OpenFermion, for example, use the UCCSD ansatz to get the ground state energy of LiH. I have checked some code, but none of them ...
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2answers
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Up to date overview of experimental approaches to quantum computing

I'm interested in getting an overview of the leading approaches to quantum computing from a physics perspective. I've read most of Nielsen and Chuang, but its chapter on physical realizations looks ...
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1answer
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Query on the HHL Algorithm in the Qiskit Aqua Library [closed]

This is a question regarding the Qiskit Aqua package. I have been studying HHL algorithm from QISKIT textbook and after understanding the math I finally got to the code part, I am having a hard time ...
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3answers
90 views

How the various quantum gates are implemented physically in quantum computer?

I'm not able to find any sources. Can you point me to some?
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1answer
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Source code for graphsim

The source code for the graph state simulator from "Fast simulation of stabilizer circuits using a graph state representation" is supposed to be at http://homepage.uibk.ac.at/homepage/c705/...
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1answer
217 views

What is the best learning path for quantum computing? [closed]

Looking for a starter point for a professional training as a Quantum Computer programmer. Is a master in Computer Science XOR Applied Physics a good starting point?

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