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Effective theory

March 14, 2017March 14, 2023 John Healy3 Comments

Happy Pi Day! When you’re trying to solve any interesting problem (a problem about almost anything) — a problem with lots of interplay between different things, it’s important to know what’s important and not, what makes a big effect on the result and not. And just how precise the result needs to be anyway (at… Continue reading Effective theory

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  1. John Healy on How to create entangled photon pairsMay 29, 2023

    Here's a twist on spontaneous parametric down-conversion, and how the non-classical correlation was verified. • Physics World > "Microwave photons…

  2. John Healy on Reckoning quanta, quantum events – nostalgia for absoluteness?May 27, 2023

    The quest for the quantum signature of Planck scale spacetime. Here's another article on research which uses the path integral…

  3. John Healy on Reckoning quanta, quantum events – nostalgia for absoluteness?May 25, 2023

    Speaking of the formulation of path integrals (which paths should you sum), here's an abstract of a research paper on…

  4. John Healy on Reckoning quanta, quantum events – nostalgia for absoluteness?May 24, 2023

    So, you can learn to read Feynman diagrams. But how do you setup the path integral sum? – which paths…

  5. John Healy on Gamma photons – formerly known as rays – the extreme EM spectrumMarch 25, 2023

    This month NASA released a visualization of gamma-photon activity from astrophysical sources and cosmic events between February 2022 to February…

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