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astro-ph.CO2026
Hidden-sector accretion and warped black-string seeds for high-redshift supermassive black holes
Chunshan Lin
The earliest massive black holes are often discussed in terms of heavy baryonic seeds, primordial black holes, or super-Eddington accretion. We develop a different possibility: a c…
astro-ph.CO2026
Bypassing the Lyth Bound with Entangled Gravitons: Primordial Signatures and Late-Time Noise
Shingo Akama, Chunshan Lin
We demonstrate that quantum entanglement between primordial gravitons in dynamically decoupled gravitational sectors can parametrically enhance the tensor power spectrum during inf…