Device independent witness of arbitrary dimensional quantum systems employing binary outcome measurements

Understand

Device independent dimension witnesses (DW) are a remarkable way to test the dimension of a quantum system in a prepare-and-measure scenario imposing minimal assumptions on the internal features of the devices.

• However, as the dimension increases, the major obstacle in the realization of DW arises due to the requirement of many outcome quantum measurements.
• In this article, we propose a new variant of a widely studied communication task (random access code) and take its average payoff as the DW.
• The presented DW applies to arbitrarily large quantum systems employing only binary outcome measurements.