Tootfinder

Comprehensive X-ray Spectral-timing Analysis of GRS 1915 105 Based on Insight-HXMT Observations
Xiao Chen, Weiping Liu, Wei Wang
https://arxiv.org/abs/2510.10017 https://…

Comprehensive X-ray Spectral-timing Analysis of GRS 1915+105 Based on Insight-HXMT Observations
GRS 1915+105 has been well studied since its discovery, and is well-known for its complex light curve variability. Using the full currently available Insight-HXMT dataset from July 2017 to June 2023, we make a comprehensive spectral-timing analysis of this source and report four main findings. First, we uncover a QPO frequency rising branch between MJD 58206 and 58230, where the centroid frequency increases from $\sim$2 Hz to $\sim$6 Hz, consistent with a spectral state transition from the hard…

Real-time dynamics with bead-Fourier path integrals. II. Bead-Fourier RPMD
Nathan London, Mohammad R. Momeni
https://arxiv.org/abs/2510.09961 https://arxiv…

Real-time dynamics with bead-Fourier path integrals. II. Bead-Fourier RPMD
Feynman path integrals (PIs) have found many uses in approximate quantum dynamics methods that are able to efficiently calculate real-time quantum correlation functions. The PIs typically take the form of discrete imaginary time slices over a closed path, where the slices form the ``beads'' of a ring polymer (RP) necklace. Some methods, such as centroid molecular dynamics (CMD), use the RP to generate an effective potential for the dynamics, while others, like RP molecular dynamics (RPMD), dire…