Non-matter entities in physics
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Non-Matter Entities in Physics: Ontology and Quantum Mechanics
Quantum Entities as Non-Individuals
In quantum mechanics, the basic entities—often called "particles"—do not behave like the individual objects we encounter in daily life. Instead, they are described as "non-individuals," meaning that the usual concepts of identity and individuality do not apply to them. This view, inspired by Erwin Schrödinger, suggests that quantum entities lack the distinctness and separateness of classical objects, challenging our traditional understanding of what it means to be an entity in physics 110. The metaphysics of quantum theory thus requires new logical systems to handle these non-individuals, as classical logic and set theory are insufficient .
Non-Material and Emergent Entities
Quantum mechanics has also led to the recognition that not all entities in physics are material in the traditional sense. Some interpretations of quantum theory suggest that reality involves non-material entities, and that the act of observation plays a fundamental role in bringing about physical phenomena. This has led to philosophical debates about whether quantum physics points to a kind of "materialism without matter," where the underlying reality is not made up of tangible, material stuff but rather of mathematical or informational structures 26.
Additionally, physics deals with emergent quantities and constructs—such as entropy, exergy, and the laws of nature—that are not physical entities themselves but have real effects on the physical world. These nonphysical entities, including mental constructs and agencies (like the laws and forces of physics), are seen as having causal power and are essential for understanding the interplay between physical and nonphysical aspects of reality 35.
Mathematical and Field-Based Entities
Modern physics often describes fundamental entities as mathematical constructs. For example, electrons are now viewed as non-physical excitation states of a mathematical field, rather than as tiny, solid objects. Fields themselves are mathematical descriptions of reality, and the entities that arise from them—such as quantum excitations—are best understood as mathematical rather than material entities .
Non-Spatial and Non-Baryonic Entities
Recent philosophical discussions and theories of quantum gravity suggest the possibility of non-spatial material objects—entities that exist but do not occupy space in the traditional sense. This challenges the standard assumption that all material objects must be spatial and calls for a revision of our understanding of material objecthood .
In cosmology and high-energy physics, the concept of non-baryonic dark matter introduces another class of non-matter entities. These are forms of matter that do not interact with light and are not made of the usual baryonic particles (protons and neutrons). Theoretical models propose new types of quarks or field manifestations as candidates for this non-baryonic dark matter, further expanding the range of non-matter entities considered in physics 78.
Non-Conserved Quantities and Physical Laws
Some important physical quantities, such as entropy and exergy, are not conserved like mass and energy. These quantities can be created or destroyed, and their existence points to a form of reality that is different from the physical entities we are familiar with. The laws of physics themselves, along with forces and even concepts like free will and life, are sometimes discussed as non-material entities with real effects, blurring the line between matter and non-matter in physics 35.
Conclusion
Physics today recognizes a wide variety of non-matter entities, ranging from non-individual quantum particles and mathematical field excitations to emergent properties, non-spatial objects, and non-baryonic dark matter. These entities challenge traditional notions of materiality, individuality, and existence, prompting ongoing philosophical and scientific debates about the true nature of reality and the entities that inhabit it 1235+5 MORE.
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