2006/06/22 by Diego Chialva, Thibault Damour · 1 citation
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Gravitation #Gravitational redshift #Gravitational wave #Gravitational-wave observatory #Pulsars and Gravitational Waves Research #Quantum #String (physics) #Superstring theory #astro-ph #gr-qc #hep-ph #hep-th
paper · pdf · doi:10.1088/1475-7516/2006/08/003
published as JCAP0608:003,2006 · 16 pages, no figure
arxiv created 2006/06/22 · openalex publication_date 2006/08/10 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We study the gravitational emission, in superstring theory, from fundamental strings exhibiting cusps. The classical computation of the gravitational radiation signal from cuspy strings features strong bursts in the special null directions associated with the cusps. We perform a quantum computation of the gravitational radiation signal from a cuspy string, as measured in a gravitational wave detector using matched filtering and located in the special null direction associated with the cusp. We study the quantum statistics (expectation value and variance) of the measured filtered signal and find that it is very sharply peaked around the classical prediction. Ultimately, this result follows from the fact that the detector is a low-pass filter which is blind to the violent high-frequency quantum fluctuations of both the string worldsheet X μ (τ,σ) and the incoming gravitational field h μν in ( x ).