Quantum Benchmarks from minimal Resources
Hauke Häseler, Norbert Lütkenhaus · arXiv (Cornell University) · 2009
We investigate several recently published benchmark criteria for storage or transmission of quantum information. A comparison reveals that criteria based on a Gaussian distribution of coherent states are most resilient to noise. We then address the issue of experimental resources and derive an equally strong benchmark, solely based on three coherent states and homodyne detection. This benchmark is further simplified in the presence of naturally occurring random phases, which remove the need for active input state modulation.