The nature of dark matter is still a subject of active research and investigation in the field of astrophysics and particle physics. While there are several theoretical proposals regarding the identity of dark matter, including the possibility of it consisting of subatomic particles, the idea of quantum entanglement with counterparts in alternate universes is currently speculative and not supported by any direct evidence or widely accepted scientific theories.
Testing such a hypothesis would be highly challenging, as it would require us to detect and measure the effects of entanglement between particles in our universe and those in alternate universes, assuming alternate universes even exist. Currently, there is no experimental technique or observational evidence available to explore or confirm the existence of alternate universes or test the entanglement of particles across them.
Scientists primarily investigate dark matter through indirect methods, such as studying its gravitational effects on visible matter and the large-scale structure of the universe. They also conduct experiments with particle accelerators and other detectors in an attempt to directly detect dark matter particles or observe their interactions. These experiments aim to identify the fundamental properties of dark matter and shed light on its composition.
While the idea of entanglement with particles in alternate universes is an intriguing concept, it remains in the realm of speculation without empirical evidence or a well-established theoretical framework. Scientific research continues to explore various avenues to understand the true nature of dark matter.