Quantum-enhanced interferometry with large heralded photon-number states
| Autor: | G. S. Thekkadath, Sae Woo Nam, Thomas Gerrits, A. I. Lvovsky, D. S. Phillips, Monika E. Mycroft, Adam Buraczewski, Bryn Bell, Andreas Eckstein, Raj B. Patel, Adriana E. Lita, C. G. Wade, Ian A. Walmsley, Magdalena Stobińska |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Photon
Computer Networks and Communications FOS: Physical sciences Quantum entanglement 01 natural sciences Article lcsh:QA75.5-76.95 010305 fluids & plasmas Optics Photon entanglement 0103 physical sciences Computer Science (miscellaneous) Quantum metrology 010306 general physics Physics Quantum optics Quantum Physics business.industry Macroscopic quantum phenomena Statistical and Nonlinear Physics lcsh:QC1-999 3. Good health Interferometry Computational Theory and Mathematics lcsh:Electronic computers. Computer science Photonics business Quantum Physics (quant-ph) lcsh:Physics |
| Zdroj: | npj Quantum Information, Vol 6, Iss 1, Pp 1-6 (2020) npj Quantum Inf |
| ISSN: | 2056-6387 |
| Popis: | Quantum phenomena such as entanglement can improve fundamental limits on the sensitivity of a measurement probe. In optical interferometry, a probe consisting of $N$ entangled photons provides up to a $\sqrt{N}$ enhancement in phase sensitivity compared to a classical probe of the same energy. Here, we employ high-gain parametric down-conversion sources and photon-number-resolving detectors to perform interferometry with heralded quantum probes of sizes up to $N=8$ (i.e. measuring up to 16-photon coincidences). Our probes are created by injecting heralded photon-number states into an interferometer, and in principle provide quantum-enhanced phase sensitivity even in the presence of significant optical loss. Our work paves the way towards quantum-enhanced interferometry using large entangled photonic states. Comment: 15 pages, 9 figures; includes Supplemental Material |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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