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gr-qc2025
Squeezed States in Gravity
Arunima Das, Maulik Parikh, Frank Wilczek +1
We present a general framework for the production of squeezed quantum states of the gravitational field in linearized quantum gravity. Time-dependent couplings in the quadratic par…
gr-qc2025
Hyperbolic Mass in 2+1 Dimensions
Raphaela Wutte
This short review surveys mass for two-dimensional asymptotically locally hyperbolic initial data sets. I explain the difficulties in defining mass in spatial dimension two, which…
hep-th2025
Photon rings in a holographic toy model
Stéphane Detournay, Sahaja Kanuri, Alexandru Lupsasca +3
Light circling around an astrophysical black hole can spend a long time skirting its unstably bound photon orbits before escaping to infinity. To a distant observer, this orbiting…