Archives for Quantum Computing
Quantum Key Distribution Scheme
BB84 (Bennett–Brassard 1984) and Non-Commuting Observables Charles Bennett’s Quantum Key Distribution (BB84) and the Role of Non-Commuting Observables The BB84 protocol (Bennett–Brassard, 1984) enables two parties, Alice and Bob, to…
Negative Time Delays and Time Travel Paradox Computational Circuits
Deutsch Circuits with Negative Time Delays & Paradox Resolution Deutsch’s Computational Circuits with Negative Time Delays 1) Context: Computation with Closed Timelike Curves (CTCs) Deutsch (1991) proposed a quantum–mechanical model…
Quantum Logic Gates and Infinite Number of States
Quantum logic gates are created from superposition of spin states. Should't there be an infinite number of possible directions that the spin can point to - so an infinite number…
Fault Tolerant, Error Correcting Computers for Quantum Computing
Fault Tolerant Computers for Quantum Computing Errors are part of the Quantum Computing equation. By 2035, IBM envisions fault tolerant computers, capable of breaking encryption algorithms. Quantum Safe Algorithms? There's…
Feynman’s Quantum Computer
Feynman's Quantum Computer Richard Feynman was one of the pioneers in the field of quantum computation. His work laid the groundwork for understanding how quantum systems could be used to…
Reversibility versus Irreversibility in Quantum Computation
Reversibility versus Irreversibility in Quantum Computation - Feynman Reversibility is a fundamental concept in quantum computing, contrasting with classical computing, where operations are often irreversible. Reversibility: Quantum computations are inherently…
Information and Coding Theory
Concepts of Information: Information is defined in terms of probability and surprise. The less likely a message is, the more information it carries. Shannon's definition of information as the base-two…
The Halting Problem for Turing Machines
The Halting Problem for Turing Machines The Halting Problem is a fundamental concept in the theory of computation, specifically related to Turing machines. A Turing machine is a mathematical model…
Applications of Qubit Devices
The applications of qubit devices as outlined in the document are diverse and impactful, extending across various fields of science, technology, and industry. Here's a detailed exploration of these applications…
Quantum Gates and Operators in Qubit Devices
Quantum Gates and Operators in Qubit Devices The document provides an in-depth analysis of quantum gates and operators, which are fundamental components of quantum computing. Quantum Gates Quantum gates are…