Observer-Bound Reality: Parallel Universes & Dimensions

Observer-Bound Reality Hypothesis (OBRH) is a speculative theoretical hypothesis concerning the relationship between observation, measurement, and physical reality in quantum physics. The hypothesis is motivated by the different outcomes observed in double-slit experiments under conditions where which-path information is unavailable or becomes obtainable. OBRH proposes that an observer may not necessarily observe the entirety of reality, but rather the physical state that is accessible within the reality in which the observer is situated. Within this framework, the concept of an observer is not restricted to human consciousness. A physical or observational system may be considered an observer if it obtains, records, or otherwise acquires information about another system. The hypothesis therefore considers both conscious and non-conscious observational systems. A central aspect of OBRH is the possibility that physical states inaccessible to an observer may not necessarily be nonexistent. Instead, they could, in principle, correspond to different physical states associated with another reality, parallel universe, or additional dimension. In this sense, what appears to an observer as an inaccessible or undefined state could potentially represent a state that is physically realized beyond the observer's accessible reality. OBRH therefore explores the theoretical possibility of multiple realities, parallel universes, or additional dimensions in which physical states inaccessible from one observer's reality could exist. These possibilities are not presented as established facts. No claim is made that parallel universes, alternate realities, or additional dimensions have been experimentally demonstrated. Rather, they are considered as possible theoretical frameworks that could potentially explain phenomena that remain conceptually unresolved within the hypothesis. The work discusses this hypothesis through several conceptual examples, including the double-slit experiment, a pencil, a fan, and a camera. These examples are used to examine how information, observation, and physical state may depend on the observational framework in which a system exists. The hypothesis also examines several fundamental questions: Does observation reveal reality, or does it determine which physical state becomes accessible? Can an observer access only the reality in which it is physically situated? Could an unobservable physical state correspond to a state existing in another reality or dimension? Could different realities or dimensions theoretically interact or exchange information? If an observer affects another system through measurement, what determines the physical state of the observer itself? Must an observer itself be observed for its state to become physically defined? A proposed theoretical research process is presented: Observation → Anomaly or unexpected result → Experiment → Identification of different physical behavior → Mathematical modeling → Investigation of possible interaction with another reality or dimension → Experimentally testable prediction The hypothesis ultimately requires a rigorous mathematical formulation, compatibility with established physical theories, and experimentally testable predictions before it can be scientifically evaluated. OBRH explores the possibility that parallel universes, alternate realities, or additional dimensions may exist and could potentially provide a theoretical framework for understanding the relationship between observation, accessible physical states, and quantum measurement. These possibilities remain speculative and require mathematical formulation and experimental evidence for scientific evaluation. This work is presented explicitly as a speculative theoretical hypothesis and has not been experimentally validated or established as a confirmed physical theory.