Transport signatures of Floquet Majorana fermions in driven topological superconductors

Understand

Floquet Majorana fermions are steady states of equal superposition of electrons and holes in a periodically driven superconductor.

• We study the experimental signatures of Floquet Majorana fermions in transport measurements and show, both analytically and numerically, that their presence is signaled by a quantized conductance sum rule over discrete values of lead bias differing by multiple absorption or emission energies at drive frequency.
• We also study the effects of static disorder and find that the quantized sum rule is robust against weak disorder.
• Thus, we offer a unique way to identify the topological signatures of Floquet Majorana fermions.