Single-Qubit Optical Quantum Fingerprinting
Rolf T. Horn, С. А. Бабичев, Karl-Peter Marzlin, Alexander I. Lvovsky, Barry Cyril Sanders · Physical Review Letters · 2005
We analyze and demonstrate the feasibility and superiority of linear optical single-qubit fingerprinting over its classical counterpart. For one-qubit fingerprinting of two-bit messages, we prepare "tetrahedral" qubit states experimentally and show that they meet the requirements for quantum fingerprinting to exceed the classical capability. We prove that shared entanglement permits 100% reliable quantum fingerprinting, which will outperform classical fingerprinting even with arbitrary amounts of shared randomness.