Quantum-enhanced interferometry with large heralded photon-number states.
npj Quantum Inf
; 6(1)2020.
Article
en En
| MEDLINE
| ID: mdl-34131511
ABSTRACT
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 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.
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1
Colección:
01-internacional
Base de datos:
MEDLINE
Idioma:
En
Revista:
Npj Quantum Inf
Año:
2020
Tipo del documento:
Article
País de afiliación:
Reino Unido