Warp Propulsion via Effective Metric Rescaling in Chronogravity

This preprint proposes a novel mechanism for effective superluminal propulsion within the Chronogravity framework, a covariant extension of general relativity that incorporates a cuscuton scalar field. By exploiting the cuscuton's unique constraint-like dynamics, Chronogravity enables stable, ghost-free violations of energy conditions using only ordinary positive-mass matter. The core idea is a local rescaling of the temporal component of the metric inside an engineered "warp bubble," producing an α > 1 factor in the line element ds² = -α² c² dt² + dx² + .... This causes proper time to advance more rapidly for observers inside the bubble relative to external coordinate time, resulting in a "faster-than-your-watch" effect that yields apparent superluminal displacement from the external perspective, without any local violation of the light-speed limit. A speculative engineering design is presented, featuring four counter-rotating ultra-dense rings that generate opposing chrono-gradients to establish and maintain the rescaled region, supplemented by periodic cuscuton excitation for dynamical stability. Energy requirements are estimated at 10¹⁸–10²⁰ J for sustained operation, within the reach of advanced technological capability. The construction avoids the negative-energy densities required by traditional Alcubierre-type models while preserving full covariance and stability. Potential observational signatures and implications for exotic spacetime engineering are briefly discussed. This work lays foundational propulsion technology for subsequent extensions within the Chronogravity programme.