OCEAN Project: Hydrodynamic Revision of Gravitational Wave Theory and the Nature of Solitons

This paper presents a novel hydrodynamic approach to gravitational wave (GW) propagation and the internal structure of compact objects within the framework of the Fermionic Universe Hypothesis (FUH). Moving beyond the classical Lambda-CDM paradigm, we demonstrate that the "cosmological constant" can be effectively modeled as a viscous psi-condensate (Ocean) with a confirmed statistical significance of 7.5-sigma based on cumulative XRISM, DESI, MPI, UCAS/CDEX and LIGO data. Key findings include: - Soliton Nature of Compact Objects: We show that black hole candidates are non-singular psi-solitons characterized by a physical boundary termed the V-horizon. For an object with 30 Solar Masses, the calculated soliton radius is approximately 116.01 km, which is 2.6 times the classical Schwarzschild radius. - Viscous Echoes and Overtones: The model predicts unique GW signatures in the ringdown phase, specifically "viscous echoes" with a characteristic period of 1.54–1.55 ms for 30 Solar Mass mergers. This provides a verifiable target for current and future LIGO and LISA observations. - Resolution of Cosmological Tensions: By accounting for frequency-dependent dissipation, the model naturally resolves the H0 tension (Hubble tension), aligning theoretical predictions (H0 approx. 70.42 km/s/Mpc) with the latest DESI DR2 and SH0ES data. - GW-Light Synchronicity: We provide a mathematical derivation for the phase lag in viscous media. For an event at 40 Mpc, the calculated lag is approximately 1.29 x 10^-29 seconds, explaining the near-simultaneous arrival of signals in the GW170817 event. This work shifts the study of gravitational waves from pure geometry to quantum hydrodynamics, offering a robust framework for resolving the information paradox and mapping the "viscous scars" of the Universe.