  We demonstrate a unique class of advanced materials - quantum composites
based on polymers with fillers comprised of a van der Waals quantum material
that reveals multiple charge-density-wave quantum condensate phases. Materials
that exhibit quantum phenomena are typically crystalline, pure, and have few
defects because disorder destroys the coherence of the electrons and phonons,
leading to collapses of the quantum states. We succeeded in preserving the
macroscopic charge-density-wave phases of filler particles after multiple
composite processing steps. The prepared composites manifest strong
charge-density-wave phenomena even above room temperature. The dielectric
constant experiences more than two orders of magnitude enhancement while the
material maintains its electrically insulating properties, opening a venue for
advanced applications in energy storage and electronics. The results present a
conceptually different approach for engineering the properties of materials,
extending the application domain for van der Waals materials.
