Quantitative control of spatial indistinguishability of identical subsystems as a direct quantum resource at distant sites has not yet been experimentally proven. We design a setup capable of tuning remote spatial indistinguishability of two independent photons by individually adjusting their spatial distribution in two distant regions, leading to polarization entanglement from uncorrelated photons. This is achieved by spatially localized operations and classical communication on photons that meet only at the detectors. The amount of entanglement depends uniquely on the degree of spatial indistinguishability, quantified by an entropic measure I, which enables teleportation with fidelities above the classical threshold. The results open the way to viable indistinguishability-enhanced quantum information processing.

Sun, K., Wang, Y., Liu, Z., Xu, X., Xu, J., Li, C., et al. (2020). Experimental quantum entanglement and teleportation by tuning remote spatial indistinguishability of independent photons. OPTICS LETTERS, 45(23), 6410-6413 [10.1364/OL.401735].

Experimental quantum entanglement and teleportation by tuning remote spatial indistinguishability of independent photons

Castellini, Alessia
Investigation
;
Nosrati, Farzam
Investigation
;
Compagno, Giuseppe;Lo Franco, Rosario
Supervision
2020

Abstract

Quantitative control of spatial indistinguishability of identical subsystems as a direct quantum resource at distant sites has not yet been experimentally proven. We design a setup capable of tuning remote spatial indistinguishability of two independent photons by individually adjusting their spatial distribution in two distant regions, leading to polarization entanglement from uncorrelated photons. This is achieved by spatially localized operations and classical communication on photons that meet only at the detectors. The amount of entanglement depends uniquely on the degree of spatial indistinguishability, quantified by an entropic measure I, which enables teleportation with fidelities above the classical threshold. The results open the way to viable indistinguishability-enhanced quantum information processing.
Settore FIS/03 - Fisica Della Materia
https://www.osapublishing.org/ol/abstract.cfm?uri=ol-45-23-6410
Sun, K., Wang, Y., Liu, Z., Xu, X., Xu, J., Li, C., et al. (2020). Experimental quantum entanglement and teleportation by tuning remote spatial indistinguishability of independent photons. OPTICS LETTERS, 45(23), 6410-6413 [10.1364/OL.401735].
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10447/449875
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