Indian scientists find efficient way to quantify quantum entanglement in higher dimensional systems

Source: The post is based on the article “Indian scientists find efficient way to quantify quantum entanglement in higher dimensional systems” published in the PIB on 10^th October 2022.

What is the News?

Indian scientists have found a simpler way to quantify the amount of entanglement in higher dimensional systems.

What is Quantum entanglement?

What are the key findings of the study on the quantum entangled state?

The quantum entangled state is a crucial state of quantum mechanics and can be used as a resource for quantum communication, quantum computation and information processing tasks that are impossible for classical systems.

The existing method of characterising a quantum entangled state is Quantum State Tomography (QST). QST can then be used to quantify entanglement. It requires the determination of an increasingly large number of parameters as the dimension of the system grows. A method for empirical estimation of entanglement for any arbitrary dimensional entangled state was not available.

Indian researchers have formulated analytical relations between statistical correlation measures and known entanglement measures for any arbitrary dimension. By using just two sets of measurements, they have experimentally quantified the amount of entanglement.

What are the benefits of the study on quantum entangled state?

The research gives a more experimentally friendly and less cumbersome alternative to QST.

-The study will enable a better assessment of the efficacy of an entangled state for technological applications like quantum teleportation.

-Higher dimensional systems (dimensions greater than two) are proven to have advantages in both quantum computing and quantum communications. Therefore, finding a way to quantify the amount of entanglement in higher dimensional systems are of critical importance.