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Researchers Demonstrate 3-Photon Split in the Microwave Domain

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Researchers at the University of Waterloo have directly split one photon into three. To do so, they created a non-Gaussian state of light using spontaneous parametric down-conversion (SPDC). Traditional SPDC, which splits a high-energy pump photon into two lower-energy photons, is a common way to produce entangled photon pairs. However, directly generating photon triplets through a single SPDC process has remained elusive. The researchers used microwave photons to stretch the known limits of SPDC. Using a flux-pumped superconducting parametric cavity, they demonstrated direct...Read full article

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    Published: February 2020
    Glossary
    quantum optics
    The area of optics in which quantum theory is used to describe light in discrete units or "quanta" of energy known as photons. First observed by Albert Einstein's photoelectric effect, this particle description of light is the foundation for describing the transfer of energy (i.e. absorption and emission) in light matter interaction.
    quantum entanglement
    Quantum entanglement is a phenomenon in quantum mechanics where two or more particles become correlated to such an extent that the state of one particle instantly influences the state of the other(s), regardless of the distance separating them. This means that the properties of each particle, such as position, momentum, spin, or polarization, are interdependent in a way that classical physics cannot explain. When particles become entangled, their individual quantum states become inseparable,...
    microwave
    An electromagnetic wave lying within the region of the frequency spectrum that is between about 1000 MHz (1 GHz) and 100,000 MHz (100 GHz). This is equivalent to the wavelength spectrum that is between one millimeter and one meter, and is also referred to as the infrared and short wave spectrum.
    Research & TechnologyeducationAmericasquantum communicationsquantum opticsOpticsCommunicationsquantum entanglementspontaneous parametric down-conversionPhoton TripletsmicrowaveTech Pulse

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