Dr Máté Farkas (ICFO Barcelona, Spain): Mutually unbiased measurements
Channel: Centrum Fizyki Teoretycznej PAN
Date: 30/11/2022

Dr Máté Farkas (ICFO Barcelona, Spain). 
Mutually unbiased measurements.
Mutually unbiased bases (MUBs) correspond to measurements in quantum theory that are complementary: if a measurement in a basis yields a definite outcome on a given quantum state, then a measurement in a basis unbiased to the first one yields a uniformly random outcome on the same state. Simple examples of MUBs are photon polarisation measurements in the horizontal and vertical directions, or spin measurements in the z and x directions of a spin-1/2 particle. Their complementary property makes MUBs highly useful in various quantum information processing tasks, such as quantum state tomography, communication tasks, Bell inequalities, and quantum cryptography.

Wednesday colloquium at CTP PAS – 2022-11-23