Silica-on-Silicon Waveguide Quantum Circuits

By Alberto Politi, M. Cryan, John G. Rarity, Siyuan Yu, Jeremy Lloyd O'Brien. Science, 2008

1,029 citations recorded by the source corpus.

Quantum technologies based on photons will likely require an integrated optics architecture for improved performance, miniaturization, and scalability. We demonstrate high-fidelity silica-on-silicon integrated optical realizations of key quantum photonic circuits, including two-photon quantum interference with a visibility of 94.8 ± 0.5%; a controlled-NOT gate with an average logical basis fidelity of 94.3 ± 0.2%; and a path-entangled state of two photons with fidelity of >92%. These results show that it is possible to directly “write” sophisticated photonic quantum circuits onto a silicon chip, which will be of benefit to future quantum technologies based on photons, including information processing, communication, metrology, and lithography, as well as the fundamental science of quantum optics.

Subfields: Artificial Intelligence, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/7ecfd9774162625694c64f992848d84d233fc7b4

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Artificial Intelligence

1. Fabio Sciarrino
2. M. G. Thompson
3. Otfried Gühne
4. Anthony Laing
5. Jianwei Wang
6. Chaoyang Lu
7. Akira Furusawa
8. Terry Rudolph

In Electrical and Electronic Engineering

1. David J. Moss
2. Roberto Morandotti
3. Brent E. Little
4. Fabio Sciarrino
5. Anthony Laing
6. M. G. Thompson
7. Jianwei Wang
8. Terry Rudolph

Citations in the corpus

• Preparation and storage of frequency-uncorrelated entangled photons from cavity-enhanced spontaneous parametric downconversion (2011, methodology): “As the most common photonic entanglement source, the spontaneous parametric downconversion (SPDC) source has been exploited to demonstrate the principles of LOQ”
• Photonic quantum technologies (2009, background): “There are already important examples, including photonic quantum circuits on a silicon chi”
• Why I am optimistic about the silicon-photonic route to quantum computing (2016, background): “For optical frequency photons manipulated by passive interferometers built from essentially perfect linear dielectric such as waveguides etched into a semiconductor chip [7] - environmental stochastic noise is presently unmeasurable, and expected to be very small.”
• Integrated multimode interferometers with arbitrary designs for photonic boson sampling (2013, methodology): “At present, the most promising technology for achieving this regime involves inputting Fock states in multi-mode integrated photonic chips [2– 4, 13–17].”
• Cascaded logic gates in nanophotonic plasmon networks (2011, background): “Finally, our plasmonic structures allow for coherent control of optical quantum interferences and may therefore have a role in the development of future photonic quantum computation device”
• Large-scale quantum photonic circuits in silicon (2016, methodology): “D shows 1000 (300) instances of CNOT [16] (controlled-phase [CPHASE] [17]) gates programmed into nonideal QPPs.”