All Quantum Computing Posts
-
Quantum Computing
Transmon Qubits 101
Transmon qubits are a type of superconducting qubit designed to mitigate charge noise by shunting a Josephson junction with a large capacitor. In other words, a transmon is a superconducting charge qubit that has reduced sensitivity to charge fluctuations. The device consists of a Josephson junction (a nonlinear superconducting element) in parallel with a sizable capacitance, which increases the ratio of Josephson energy to charging…
Read More » -
Quantum Computing
Glossary of Quantum Computing Terms
Glossary of Quantum Computing, Quantum Networks, Quantum Mechanics, and Quantum Physics Terms for Cybersecurity Professionals.
Read More » -
Quantum Computing
Information-Triggered Collapse (ITC): An Information-Theoretic Approach to Wavefunction Reduction
We propose a new theoretical framework, Information-Triggered Collapse (ITC), which suggests that quantum wavefunction collapse occurs when the information content or complexity of a quantum system and its environment reaches a critical threshold. This idea is motivated by the growing recognition of information as a fundamental physical quantity, as seen in concepts like Wheeler's "it from bit" [Wheeler, 1990], Bekenstein's bound [Bekenstein, 1981], and Quantum…
Read More » -
Quantum Computing
Lattice Surgery
Quantum computing promises to solve complex problems far beyond the reach of classical machines, but today's quantum hardware is plagued by short-lived qubits and error rates that make long computations infeasible. Quantum error correction (QEC) is essential to stabilize qubits and enable fault-tolerant quantum computing. One of the leading QEC approaches is the surface code, a topological error-correcting code known for its high error threshold…
Read More » -
Post-Quantum, PQC, Quantum Security
Adiabatic Quantum Computing (AQC) and Impact on Cyber
Adiabatic Quantum Computing (AQC), and its variant Quantum Annealing, are another model for quantum computation. It's a specialized subset of quantum computing focused on solving optimization problems by finding the minimum (or maximum) of a given function over a set of possible solutions. For problems that can be presented as optimization problems, such as 3-SAT problem, quantum database search problem, and yes, the factoring problem…
Read More » -
Quantum Computing
Routing Quantum Information: SWAP, iSWAP, and Moving Qubit States
Quantum computers face a unique challenge in moving quantum information between qubits. Unlike classical bits that can be shuttled freely along wires, qubits cannot be arbitrarily copied or moved due to the no-cloning theorem. To route a qubit’s state from one location to another, one must use quantum operations that effectively reposition the state without making a separate copy. This is especially critical in architectures…
Read More » -
Quantum Computing
Surface Code Quantum Error Correction
Quantum error correction (QEC) is indispensable for building large-scale fault-tolerant quantum computers. Even today’s best qubits suffer error rates that would quickly corrupt any long calculation if left uncorrected. The principle of QEC is to encode a single logical qubit into multiple physical qubits such that errors can be detected and fixed without measuring the actual quantum data. Among many QEC codes, the surface code…
Read More » -
Quantum Computing
Quantum Supremacy vs. Quantum Advantage
In the ever-accelerating world of quantum computing, two terms have emerged as the darlings of headlines and conference keynotes: quantum supremacy and quantum advantage. If you've followed the news, you might think they're interchangeable buzzwords celebrating the dawn of a new computing era. But dig a little deeper, and you'll uncover a subtle yet spirited debate among the field's top minds - one that's as…
Read More »
