Calculations showing that rapidly spinning black holes permit stable orbits close enough to the horizon for extreme time dilation matching Interstellar, with suggested astrophysical uses.
Demonstration of Time Delay Interferometry and Spacecraft Ranging in a Space-based Gravitational Wave Detector using the UF-LISA Interferometry Simulator
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abstract
Space-based gravitational-wave observatories such as the Laser Interferometer Space Antenna (LISA) use time-shifted and time-scaled linear combinations of differential laser-phase beat signals to cancel the otherwise overwhelming laser frequency noise. Nanosecond timing precision is needed to accurately form these Time-Delay Interferometry (TDI) combinations which defines a ~1 meter requirement on the inter-spacecraft ranging capability. The University of Florida Hardware-in-the-loop LISA Interferometry Simulator (UFLIS) has been used to test Time-Delay Interferometry in a configuration which incorporates variable delays, realistic Doppler shifts, and simulated gravitational-wave signals. The TDI 2.0 combinations are exploited to determine the time-changing delays with nanosecond accuracy using a TDI-ranging reference tone. These variable delays are used in forming the TDI combinations to achieve the LISA interferometry sensitivity resulting from 10 orders of magnitude laser frequency noise cancellation.
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gr-qc 1years
2026 1verdicts
UNVERDICTED 1representative citing papers
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Astrophysical Applications of the Physics presented in the Film Interstellar
Calculations showing that rapidly spinning black holes permit stable orbits close enough to the horizon for extreme time dilation matching Interstellar, with suggested astrophysical uses.