RRI Scientists found a new way for quantum state estimation

Scientists experimenting with new ways to manipulate quantum states so that they can be harnessed for computing, communication, and metrology, has found a novel way to characterise and estimate such states.

Daily Current Affairs Quiz 2020

Key-Points

This method of characterisation called Quantum State Interferography, can help make such manipulations simpler so that several crucial operations in quantum technologies become less cumbersome.

The setup requires only two interferometers from which many interferograms can be obtained to reconstruct the state.

This provides a ‘black box’ approach to quantum state estimation – between the incidence of the photon and extraction of state information, conditions within the set-up are not changed, thus providing a true single-shot estimation of the quantum state.

A qubit is a 2-dimensional quantum system and requires usually 2 complex numbers to be determined towards state estimation.