Quantum information and quantum foundations are becoming popular topics for
advanced undergraduate courses. Many of the fundamental concepts and
applications in these two fields, such as delayed choice experiments and
quantum encryption, are comprehensible to undergraduates with basic knowledge
of quantum mechanics. In this paper, we show that the quantum eraser, usually
used to study the duality between wave and particle properties, can also serve
as a generic platform for quantum key distribution. We present a pedagogical
example of an algorithm to securely share random keys using the quantum eraser
platform and propose its implementation with quantum circuits.Comment: 7 pages, 4 figures; updated versio