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by negativelambda
629 days ago
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This is cool... One of the team’s proposed innovations is to use available data from LIGO as a data/background filter... “The LIGO observatories are very good at detecting gravitational waves, but they cannot catch single gravitons,” notes Beitel, a Stevens doctoral student. “But we can use their data to cross-correlate with our proposed detector to isolate single gravitons.” |
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"Mass-Independent Scheme to Test the Quantumness of a Massive Object" (2024) https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.13... .. https://news.ycombinator.com/item?id=39048910 :
> This yields a striking result: a mass-independent violation of MR is possible for harmonic oscillator systems. In fact, our adaptation enables probing quantum violations for literally any mass, momentum, and frequency. Moreover, coarse-grained position measurements at an accuracy much worse than the standard quantum limit, as well as knowing the relevant parameters only to this precision, without requiring them to be tuned, suffice for our proposal. These should drastically simplify the experimental effort in testing the nonclassicality of massive objects ranging from atomic ions to macroscopic mirrors in LIGO.
From https://news.ycombinator.com/item?id=30847777 .. From "Massive Black Holes Shown to Act Like Quantum Particles" https://www.quantamagazine.org/massive-black-holes-shown-to-... :
> Physicists are using quantum math to understand what happens when black holes collide. In a surprise, they’ve shown that a single particle can describe a collision’s entire gravitational wave.
> "Scale invariance in quantum field theory" https://en.wikipedia.org/wiki/Scale_invariance#Scale_invaria...
"New ways to catch gravitational waves" https://news.ycombinator.com/item?id=40825994 :
- "Kerr-Enhanced Optical Spring" (2024) https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.13... .. "Kerr-enhanced optical spring for next-generation gravitational wave detectors" (2024) https://news.ycombinator.com/item?id=39957123
- "Physicists Have Figured Out a Way to Measure Gravity on a Quantum Scale" with a superconducting magnetic trap made out of Tantalum (2024) https://news.ycombinator.com/item?id=39495482
- "Measuring gravity with milligram levitated masses" (2024) https://www.science.org/doi/10.1126/sciadv.adk2949
"Physicists Have Figured Out a Way to Measure Gravity on a Quantum Scale" https://news.ycombinator.com/item?id=39495482#39495570 .. https://news.ycombinator.com/item?id=30847777 :
> Does a fishing lure bobber on the water produce gravitational waves as part of the n-body gravitational wave fluid field, and how separable are the source wave components with e.g. Quantum Fourier Transform/or and other methods?