Quantum Correlation Complexity and Its Measures
Measures of quantum correlations beyond entanglement, such as discord, how they differ from classical correlations and where they matter.
BasicsAlgorithmsHardwareError CorrectionCryptographyMachine LearningInformation TheoryPhysics & SimulationApplicationsIndustry & Careers
Quantum Information Theory
Entropy, channel capacity, teleportation, complexity classes and the theorems that define what quantum information can and cannot do.
155 articles
Quantum Coherence as a Resource, Quantified
The resource theory of coherence treats superposition as a resource that can be measured. Coherence measures and their link to entanglement.
Entanglement Complexity: Measuring How Tangled
How entanglement is quantified: entanglement entropy, witnesses and other measures, plus experiments, swapping, teleportation and networks.
Quantum Threshold Logic and Its Circuits
Threshold logic gates fire when a weighted sum passes a threshold. How this idea is carried over to quantum circuits and where it might apply.
Quantum Gibbs States: Preparation and Complexity
Quantum Gibbs states describe quantum systems in thermal equilibrium. How hard they are to prepare and study, and their uses.
The Cost of Quantum State Tomography
Full quantum state tomography needs a number of measurements that grows exponentially with qubits. The cost, the methods and the alternatives.
Quantum State Distinguishability and Trace Distance
How distinguishable two quantum states are is measured by the trace distance and fidelity. Why it matters for measurement, protocols and codes.
Solving Polynomial Equations on Quantum Hardware
How quantum algorithms approach polynomial equations and polynomial optimization, and what speedups are plausible.
Quantum Class Separations: Where Quantum Wins
Where quantum and classical complexity classes are known or believed to differ, from oracle separations to the complexity zoo.
Models of Quantum Computation, Compared
The main models of quantum computation compared: circuits, adiabatic, measurement-based and topological, with their hardware and limits.
Quantum Interactive Proofs: Power and Protocols
Quantum interactive proofs let a verifier check a prover by exchanging quantum messages. The roles, security and the result QIP equals PSPACE.
Quantum Information Theory: Entropy and Channels
Quantum information theory: qubits, von Neumann entropy, entanglement, channels and their applications in cryptography and computing.
