Neutrinic echo

Neutrinal echo refers to a phenomenon involving the delayed detection of neutrino signals, typically caused by interactions between neutrinos and dense or high-energy fields in space-time. Neutrinos, as nearly massless particles, are known for their weak interactions with matter and their ability to pass through most materials unimpeded.

However, in regions of high curvature - from black hole proximity to far smaller masses -, the neutrino wavefunction experiences phase shifts and time dilation. This interaction, coupled with the minuscule mass of neutrinos, allows for a detectable time-lagged signal to emerge, often in the form of a weak, secondary neutrino pulse - an "echo" effect.

They key is then to design detectors equipped with quantum sensors capable of resolving extremely low-energy and high resolution echoing events. Echoes can be mapped to structures or regions of space exhibiting anomalous properties or mass.