kvantmetrologian
Kvantmetrologian, or quantum metrology, is the field that applies quantum theory to precision measurement. It seeks to improve the estimation of physical parameters such as time, phase, frequency, magnetic fields, or strain by exploiting nonclassical states of light and matter. By preparing probes in entangled or squeezed states, the best achievable precision can surpass the standard quantum limit that governs independent measurements.
Key concepts in kvantmetrologian include the quantum Fisher information and the quantum Cramér-Rao bound, which set
Technologies and platforms used in quantum metrology span optical, atomic, and solid-state systems. Optical interferometry is
Challenges include decoherence, loss, and detector inefficiency, which limit real-world gains. Generating and maintaining large entangled
Applications of kvantmetrologian span timekeeping, navigation, and high-precision sensing, with ongoing research aimed at imaging, spectroscopy,