Single-qubit optical quantum fingerprinting
Rolf T. Horn, S. A. Babichev, Karl-Peter Marzlin, A. I. Lvovsky, Barry C. Sanders
Abstract
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.
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