Retrieving "Gravitational Wave" from the archives

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1. Cosmic Microwave Background

   Linked via "gravitational waves"

   E-mode Polarization: Caused by density fluctuations (monopole and quadrupole moments). E-mode patterns resemble the curl-free electric field lines observed in classical electromagnetism.
   B-mode Polarization: These are curl-like patterns. Primordial B-modes, hypothesized to originate from gravitational waves generated during the epoch of inflation, are a major target of current research. However, subdominant B-modes are also generated via [gravitational lensing](/entries/gravitational-le…

2. Cosmic String

   Linked via "gravitational waves"

   Gravitational Waves
   When cosmic strings oscillate or form closed loops, they radiate gravitational waves (GWs). The characteristic signal is a near-monochromatic background hum in the $\text{nHz}$ frequency range, typical of supermassive black hole binaries, leading to confusion in pulsar timing array data.
   | String Configuration | Characteristic GW Frequency | Predicted …

3. Higgs Field

   Linked via "gravitational wave"

   Interaction with Spacetime Curvature
   Recent, albeit controversial, theoretical work suggests that the Higgs field interacts weakly with localized regions of extreme gravitational curvature, specifically within the immediate vicinity of rotating black holes (Kerr metrics). This interaction is mediated by a hypothesized scalar-tensor coupling parameter, $\kappa_{\text{GR}}$, which is theorized to cause a slight, measurable oscillation in the local Higgs $\text{VEV}$ proportional to the square of the angular momentum densi…