3 papers
gr-qc2026
Quantum coherent dynamics of quasiclassical spacetimes
Sijia Wang, Achintya Sajeendran, Dong-han Yeom +2
In a wide range of quantum gravity theories, quasiclassical geometries, which are solutions to the Einstein field equations approximately, are described by "coherent states." Here…
quant-ph2026
Time-energy uncertainty relation from subcycle mode vacuum fluctuations of a quantum field
Achintya Sajeendran, Timothy C. Ralph
The time-energy uncertainty relation is often invoked as a heuristic explanation for virtual particles in interacting quantum field theories. However, this interpretation breaks do…
gr-qc2025
Looping back to the past through free fall in a controlled warp drive spacetime
Achintya Sajeendran, Timothy C. Ralph
We present a modification to a 'rotating' version of the dynamical Alcubierre spacetime, which was previously shown to permit closed timelike curves. We find that if the effective…