Quantum Metrology with Light
Metrology is the science of measurement. It focuses on how accurately we can measure physical quantities—like time, length, mass, temperature, etc. Quantum metrology, on the other hand, goes beyond the….
Tag: entangled photons
Quantum Imaging
Quantum imaging is an advanced technique that uses the unique properties of quantum light to produce images in ways that classical light can’t. It harnesses the quantum behavior of photons,….
Nonlinear Quantum Optics
Before diving into nonlinear quantum optics, let’s understand nonlinear optics in general. Light usually behaves linearly in most materials—meaning that if you double the input light, you get double the….
Satellite-Based Quantum Communication
As we move toward a future powered by quantum technologies, one of the biggest challenges is scaling quantum communication across vast distances—far beyond the reach of fiber optics or terrestrial….
Device-Independent QKD
Device-Independent Quantum Key Distribution (DI-QKD) is an advanced form of quantum key distribution that provides the highest level of security, even if the devices used in the protocol are untrusted….
E91 Protocol
The E91 Protocol is a Quantum Key Distribution (QKD) method proposed by physicist Artur Ekert in 1991. It was a significant development in quantum cryptography because it uses quantum entanglement….