Journal
SCIENCE
Volume 328, Issue 5980, Pages 879-881Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1188172
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Funding
- Ilan Ramon Fellowship
- German-Israeli Foundation for Scientific Research and Development
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Precision measurements can be brought to their ultimate limit by harnessing the principles of quantum mechanics. In optics, multiphoton entangled states, known as NOON states, can be used to obtain high-precision phase measurements, becoming more and more advantageous as the number of photons grows. We generated high-NOON states (N = 5) by multiphoton interference of quantum down-converted light with a classical coherent state in an approach that is inherently scalable. Super-resolving phase measurements with up to five entangled photons were produced with a visibility higher than that obtainable using classical light only.
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