Running summarizing tools on a new article

Abstract: Conventional Virtual Reality (VR) systems are structured around discrete, fixed worlds, requiring mechanisms such as portals or scene-blending to transition between worlds. This structure limits the creation of subjective, continuous spatial experiences. We introduce Spectral Space, a framework that augments the conventional 3-dimension virtual space with an additional non-spatial axis that we call frequency. Virtual entities are assigned with perceptual intensity functions along this axis, allowing their visibility to change smoothly as users adjust their position on the frequency axis. This enables multiple worlds to coexist in place and produces intermediate spaces that emerge from the graded overlap of entities. We implemented a prototype system and conducted a user study comparing spectral transitions with two representative VR transition techniques (discrete teleportation and continuous dissolve). Results show that Spectral Space can maintain presence and self-location while significantly increasing usable spatial range, promoting exploratory behavior, and supporting layered interpretation of objects and worlds. These findings demonstrate that organizing virtual worlds as continuous spectral layers provides a viable and expressive alternative to scene-based VR, expanding the design space for multi-world interaction and navigation. This work opens new directions for space design strategies and augmenting human experience by redefining the spatial foundation of virtual space.