Entangelet

Entangelet is a theoretical subatomic particle proposed in speculative extensions of quantum chromodynamics. The term combines the notion of entanglement, a quantum phenomenon in which particles share correlated states, with the suffix "-let" used for small or elementary entities such as mesons or leptons. Entangelets are defined as hypothetical localized states in which two or more quarks form a bound system that exhibits long-range quantum entanglement across separations larger than typical confinement scales.

Proponents of entangelet theory argue that such states could arise in environments with extreme energy densities, such as the cores of neutron stars or during high-energy heavy-ion collisions. In these settings, quantum fluctuations may enable quark pairs to maintain coherence over macroscopic distances, leading to a nonclassical linkage between otherwise independent particles. If realized, entangelets would challenge the conventional picture of quark confinement, implying that color charge could be effectively screened over extended spacetime volumes.

Theoretical models have explored the stability of entangelets by extending lattice QCD calculations and invoking color superconductivity frameworks. Results suggest that stable configurations might exist only under conditions of ultra-high pressure and temperature, where the deconfined quark-gluon plasma phase persists. Experimental detection would require signatures such as anomalous correlations in particle jet distributions or unconventional decay patterns, none of which have yet been observed. Consequently, entangelet remains a speculative construct in particle physics, with its existence unconfirmed by existing experimental data.