Currently, there is no single comprehensive theory that fully explains both special relativity and quantum mechanics in a unified framework. Special relativity, developed by Albert Einstein, describes the behavior of objects moving at high speeds and the relationship between space and time. On the other hand, quantum mechanics is a framework that describes the behavior of particles at the microscopic level and incorporates concepts like wave-particle duality and uncertainty.
While special relativity and quantum mechanics are both highly successful theories, they have different mathematical formulations and make different assumptions about the nature of reality. Combining them into a single consistent framework, known as a theory of quantum gravity or a theory of everything, has been a significant challenge in theoretical physics.
Many physicists and researchers are actively working on developing such a theory, often referred to as quantum gravity or a theory of quantum gravity. Several approaches have been proposed, such as string theory, loop quantum gravity, and others. These approaches aim to reconcile the principles of quantum mechanics with those of general relativity, which is a theory that describes gravity on a large scale.
However, it's important to note that these theories are still under development, and there is currently no widely accepted and experimentally verified theory that successfully unifies both special relativity and quantum mechanics. The quest for a complete theory that encompasses both realms of physics remains an active area of research and a topic of great interest in theoretical physics.