Qubit entanglement between ring-resonator photon-pair sources on a silicon chip
Joshua W. Silverstone,Raffaele Santagati,Damien Bonneau,Michael J. Strain,Marc Sorel,Jeremy L. O'Brien,Mark G. Thompson +6 more
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TLDR
A silicon photonic chip that uses resonant-enhanced photon-pair sources, spectral demultiplexers and reconfigurable optics to generate a path-entangled two-qubit state and analyse its entanglement and shows that ring-resonator-based spontaneous four-wave mixing photon- Pair sources can be made highly indistinguishable and their spectral correlations are small.Abstract:
Entanglement--one of the most delicate phenomena in nature--is an essential resource for quantum information applications. Scalable photonic quantum devices must generate and control qubit entanglement on-chip, where quantum information is naturally encoded in photon path. Here we report a silicon photonic chip that uses resonant-enhanced photon-pair sources, spectral demultiplexers and reconfigurable optics to generate a path-entangled two-qubit state and analyse its entanglement. We show that ring-resonator-based spontaneous four-wave mixing photon-pair sources can be made highly indistinguishable and that their spectral correlations are small. We use on-chip frequency demultiplexers and reconfigurable optics to perform both quantum state tomography and the strict Bell-CHSH test, both of which confirm a high level of on-chip entanglement. This work demonstrates the integration of high-performance components that will be essential for building quantum devices and systems to harness photonic entanglement on the large scale.read more
Citations
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On-chip generation of high-dimensional entangled quantum states and their coherent control
Michael Kues,Christian Reimer,Piotr Roztocki,Luis Romero Cortes,Stefania Sciara,Stefania Sciara,Benjamin Wetzel,Benjamin Wetzel,Yu Zhang,Alfonso Carmelo Cino,Sai T. Chu,Brent E. Little,David J. Moss,Lucia Caspani,José Azaña,Roberto Morandotti,Roberto Morandotti +16 more
TL;DR: This work demonstrates on-chip generation of entangled qudit states, where the photons are created in a coherent superposition of multiple high-purity frequency modes, and introduces a coherent manipulation platform with which to control frequency-entangled states, capable of performing deterministic high-dimensional gate operations.
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Nicholas C. Harris,Gregory R. Steinbrecher,Mihika Prabhu,Yoav Lahini,Jacob Mower,Darius Bunandar,Changchen Chen,Franco N. C. Wong,Tom Baehr-Jones,Michael Hochberg,Seth Lloyd,Dirk Englund +11 more
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