Recurrent generation of maximally entangled single-particle states via quantum walks on cyclic graphs
Dinesh Kumar Panda, Colin Benjamin · Physical Review A · 2023
While earlier research has predicted that maximally entangled single-particle states (MESPS), i.e., entanglement between different degrees of freedom of the same particle, can occur using quantum walk schemes with two or more coins or with a coin and identity operation, the authors analytically predict that MESPS can be generated using only a single coin on cyclic graphs. The generated MESPS occurs at recurring time steps, an advantage the authors exploit in a quantum cryptographic protocol.