Gokul Alex
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How is a quantum computer programmed?
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Let us look at each observation and question in perspective. Before delving deep into the questions, please let me share a few reference architecture diagrams on the components of a quantum computer. ...

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Academic journals dedicated to quantum algorithms
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Following are a few insightful journals on quantum information, computation and algorithms. Quantum Journal Quantum Information and Computation Journal of Quantum Computing

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Is quantum backpropagation faster than classical backpropagation?
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In general, the efficiency of Quantum Machine Learning Techniques will be calibrated and measured more in terms of the energy efficiency, ability to handle complex computational problems, NP-hard ...

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Can the Bloch sphere be generalized to two qubits?
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For more than 1-qubit visualization, we will need more complex visualizations than a Bloch sphere. The below answer from Physics Stack Exchange explains this concept quite authoritatively: Bloch ...

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Quantum random number generator
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Hadamard Gates together with Quantum Bloom Filters and a Verifiable Random Functions can prove to be a simple but elegant implementation of Quantum Algorithmic Randomness. This technique can be seen ...

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What constitutes a quantum database?
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It is a very interesting question. Quantum database would be a correlated collection of entangled ensembles of quantum data structures such as bloom filters, quantum graphs and quantum time series ...

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Installing Qiskit Error: Building wheel for ecos error
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This error seems to be reported by various users as per the Qiskit GitHub repository. Could you please try the following steps. Install Anaconda Create a python 3.7 environment: conda create --name ...

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Resources on randomized algorithms for analysis and design of quantum algorithms
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Probability And Randomness: Quantum Versus Classical by By Andrei Yu Khrennikov is a great book on the foundations of quantum randomness. Introduction to Random Time and Quantum Randomness by Kai Lai ...

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Can quantum states have negative probability?
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Though we don't come across negative probabilities in a quantum computation problem in the general sense, there is a historic context on the discussion and debate around negative probabilities in ...

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References on quantum arithmetic circuit complexity
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There are some common Quantum Arithmetic Circuits such as Basic Quantum Adders and Multipliers, QFT based circuits, Integer adders, Galois Field Multipliers etc. are used in various quantum algorithms ...

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How could a quantum computer perform nimber arithmetic?
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It is relevant to consider the following research paper from Mashiko Fukiyama on Nim Game on Graph to come up with an algorithmic approach . At first, to set a starting position of the game, we fix ...

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What is the difference between quantum key distribution and quantum key exchange?
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Quantum key distribution (QKD) is a secure communication method that enables two parties to produce a shared random secret key known only to them, which can then be used to encrypt and decrypt ...

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Do I have to upgrade to personal computer or laptop computer in order to be able to use the IBM Quantum Experience website or run code locally?
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You can run IBM Quantum Experience from any modern browser in the Tablet. In IBM Quantum Experience, you can explore basic circuits. However, you may find it difficult to use Qiskit notebooks from ...

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Resources for quantum biology
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Following are some of the latest resources on Quantum Biology Youtube video by the Royal Institution: Quantum Biology: An Introduction Wikipedia page on quantum biology (and links therein) ...

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Quantum Machine Learning in NISQ era
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Quantum Machine Learning in this NISQ Era is making progress in the problems related classification, categorisation, clustering, and optimisation areas for specific type of datasets in chemistry, ...

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Get a sparse matrix of quantum circuit
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There are classes for Operators, States, Channels, Measures, Randomness, Analysis and Synthesis in Quantum Information ( qiskit.quantum_info ). There is a specific class called SparsePauliOp. It is ...

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What limits speed of quantum gates?
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There has been some early studies on the speed limits of speed limits for quantum gates in multi-qubit systems by S. Ashhab, P. C. de Groot, and Franco Nori published in Physical Review. As per this ...

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Distributed quantum computing with classical communication
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One of the possible methods for distributed quantum computing is remote quantum entanglement. There is a proposal by Mihir Pant and others to develop protocols for quantum “repeater” nodes, which ...

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Why does the Hadamard gate satisfy $H|x\rangle=\frac{1}{\sqrt2}\sum_{z\in\{0,1\}}(-1)^{xz}\lvert z\rangle$?
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Hadamard gate is used in the Deutch - Jozsha algorithm to prepare a superposition representing all possible bit combinations. It uses the quantum parallelism concept to compute all values of f(x) ...

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Books about the measurement for Hamiltonian Energy
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We can find a number of good articles on Hamiltonians in Adiabatic Quantum Computing. Please let me share a few prominent articles here. Hamiltonian engineering for adiabatic quantum computation: ...

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IBM Q Experience - Can it be used draw out ML inferences?
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Quantum machine learning can help you to enhance classical machine learning algorithms by outsourcing difficult calculations to a quantum computer. You can also optimise quantum algorithms using ...

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Entanglement and distributed consensus
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In addition to the mentioned papers, there has been some interesting research efforts in designing Quantum Distributed Consensus Algorithms. In one of the early approaches, Ellie D’Hondt and Prakash ...

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Quantum algorithm for QR and SVD matrix decomposition?
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I could find a few research papers with the potential application of quantum algorithms for Singular Value Decomposition and QR decomposition. Singular Value Decomposition: Singular Value ...

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Quantum walk with binary tree
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Quantum Walk may not perform in optimal ways over a conventional and determinisitc binary tree data structure. In a quantum walk experimental setup, the coin will not follow a binomial distribution. ...

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Gradient boosting akin to XGBoost using a quantum device
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Boosting Algorithms are considered as iterative functional gradient descent algorithms. These algorithms optimize a cost function over function space by iteratively choosing a function (weak ...

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Where can I get circuits of interest to quantum chemistry to try and simplify?
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The Qiskit.chemistry is part of the Qiskit Aqua (Algorithms for QUantum computing Applications). The qiskit.chemistry package supports problems including ground state energy computations, excited ...

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Does Qiskit offer a stack of functions to generate and manipulate graph states?
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There is a Graph State circuit available on IBM Qiskit. Graph state preparation circuits are Clifford circuits, and thus easy to simulate classically. However, by adding a layer of measurements in a ...

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How can I load a probability distribution using a quantum circuit in Qiskit?
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There are practical examples in Qiskit on how to use common probability distributions with uncertainty models. Let us refer to the following example from Qiskit-AQUA (Algorithms for QUantum computing ...

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Example of a quantum algorithm better than its classical counterpart which involves only $1$ qubit?
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We can construct quantum verified delay functions ( QVDF ) and delay authentication ( QDA ) circuits using single quibit quantum circuits. Like quantum randomness generators ( QRN ), these delay ...

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Can quantum computers be clustered together?
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The concept of quantum computing clusters could be formalised into a generalised distributed quantum computers. We will need both quantum networks and distributed quantum computing algorithms to ...

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