(Indistictum.com) Researchers from Raman Research Institute (RRI), an autonomous institution under the Department of Science & Technology (DST) have devised a new test for fairness of quantum coin or ‘qubit’ (the basic unit of information in a quantum computer) using entanglement theory.
This is a significant contribution to quantum state discrimination, an essential aspect of quantum information science which is expected to influence quantum sensing. The new test uses entanglement to test the fairness of the quantum coin.
This work is a significant contribution to the domain of quantum state discrimination. It brings out the crucial role of entanglement in improving our ability to discriminate quantum states. In this work, the researchers concretely implemented the theoretical idea of the simulation facility of the IBM quantum computer. They also carried out experiments on the IBM quantum computer, which have brought out the shortcomings of the experimental hardware and their work is expected to pave the way towards improving the experimental devices (by reducing gate errors and noise due to decoherence) used in the IBM quantum computer facility.

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