Why Quantum Cryptography Needs Distrust Built Into the Experiment

Why Quantum Cryptography Needs Distrust Built Into the Experiment

Quantum cryptography has always sold itself on an elegant promise: physics, not mathematics, guarantees secrecy. An eavesdropper cannot copy an unknown quantum state without disturbing it, so any interception leaves fingerprints. Yet this promise rests on a hidden...
Why Quantum Materials Researchers Are Obsessed With Defect Symmetry

Why Quantum Materials Researchers Are Obsessed With Defect Symmetry

Imperfection, in the quantum laboratory, is not a nuisance to be eliminated but a resource to be harvested. A crystal lattice that appears flawless to the naked eye is, at the atomic scale, a landscape of vacancies, substitutions, and interstitial intruders—each one a...
Why Multi-Qubit Fidelity Matters More Than a Single Record Number

Why Multi-Qubit Fidelity Matters More Than a Single Record Number

Quantum computing has spent two decades chasing headline numbers, and the industry has learned to celebrate them with almost liturgical regularity. A laboratory announces a single qubit with a coherence time measured in milliseconds, or a gate fidelity that creeps...