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Quantum researchers able to split one photon into three

Date:
February 27, 2020
Source:
University of Waterloo
Summary:
Researchers report the first occurrence of directly splitting one photon into three. The occurrence, the first of its kind, used the spontaneous parametric down-conversion method (SPDC) in quantum optics and created what quantum optics researchers call a non-Gaussian state of light. A non-Gaussian state of light is considered a critical ingredient to gain a quantum advantage.
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Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo report the first occurrence of directly splitting one photon into three.

The occurrence, the first of its kind, used the spontaneous parametric down-conversion method (SPDC) in quantum optics and created what quantum optics researchers call a non-Gaussian state of light. A non-Gaussian state of light is considered a critical ingredient to gain a quantum advantage.

"It was understood that there were limits to the type of entanglement generated with the two-photon version, but these results form the basis of an exciting new paradigm of three-photon quantum optics," said Chris Wilson, a principle investigator at IQC faculty member and a professor of Electrical and Computer Engineering at Waterloo. "Given that this research brings us past the known ability to split one photon into two entangled daughter photons, we're optimistic that we've opened up a new area of exploration."

"The two-photon version has been a workhorse for quantum research for over 30 years," said Wilson. "We think three photons will overcome the limits and will encourage further theoretical research and experimental applications and hopefully the development of optical quantum computing using superconducting units."

Wilson used microwave photons to stretch the known limits of SPDC. The experimental implementation used a superconducting parametric resonator. The result clearly showed the strong correlation among three photons generated at different frequencies. Ongoing work aims to show that the photons are entangled.

"Non-Gaussian states and operations are a critical ingredient for obtaining the quantum advantage," said Wilson. "They are very difficult to simulate and model classically, which has resulted in a dearth of theoretical work for this application."


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Materials provided by University of Waterloo. Note: Content may be edited for style and length.


Journal Reference:

  1. C. W. Sandbo Chang, Carlos Sabín, P. Forn-Díaz, Fernando Quijandría, A. M. Vadiraj, I. Nsanzineza, G. Johansson, C. M. Wilson. Observation of Three-Photon Spontaneous Parametric Down-Conversion in a Superconducting Parametric Cavity. Physical Review X, 2020; 10 (1) DOI: 10.1103/PhysRevX.10.011011

Cite This Page:

University of Waterloo. "Quantum researchers able to split one photon into three." ScienceDaily. ScienceDaily, 27 February 2020. <www.sciencedaily.com/releases/2020/02/200227122119.htm>.
University of Waterloo. (2020, February 27). Quantum researchers able to split one photon into three. ScienceDaily. Retrieved October 31, 2024 from www.sciencedaily.com/releases/2020/02/200227122119.htm
University of Waterloo. "Quantum researchers able to split one photon into three." ScienceDaily. www.sciencedaily.com/releases/2020/02/200227122119.htm (accessed October 31, 2024).

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