The old quantum theory is a collection of results from the years 1900–1925 which predate modern quantum mechanics. The theory was never complete or self-consistent...

of all quantum physics, which includes quantum chemistry, quantum field theory, quantum technology, and quantum information science. Quantum mechanics...

photoelectric effect, solar emission spectra—an era called the Old or Older quantum theories. Building on the technology developed in classical mechanics...

up quantum theory in Wiktionary, the free dictionary. Quantum theory may refer to: Quantum mechanics, a major field of physics Old quantum theory, predating...

of quantum theory is that the predictions it makes are probabilistic. The procedure for finding a probability involves combining a quantum state, which...

interpretation of quantum mechanics is an attempt to explain how the mathematical theory of quantum mechanics might correspond to experienced reality. Quantum mechanics...

the universe. He claimed that both quantum theory and relativity pointed to this deeper theory, a quantum field theory. This more fundamental level was...

superseding or replacing quantum theory should account for such experiments and therefore cannot fulfill local realism; quantum nonlocality is a property...

theoretical physics, quantum field theory (QFT) is a theoretical framework that combines classical field theory, special relativity, and quantum mechanics.: xi ...

collapse is explained by the mechanism of quantum decoherence. Decoherence approaches to interpreting quantum theory have been widely explored and developed...

physics, a hidden-variable theory is a deterministic physical model which seeks to explain the probabilistic nature of quantum mechanics by introducing...

Quantum chaos is a branch of physics focused on how chaotic classical dynamical systems can be described in terms of quantum theory. The primary question...

Quantum information science is a field that combines the principles of quantum mechanics with information theory to study the processing, analysis, and...

understanding of quantum mechanics, the theory has developed in several directions and experimental studies have confirmed some of the key issues. Quantum computing...

non-commutativity of operators representing quantum observables. Prior to the development of quantum mechanics as a separate theory, the mathematics used in physics...

theory, also known as the pilot wave theory, Bohmian mechanics, Bohm's interpretation, and the causal interpretation, is an interpretation of quantum...

of the theory. QBism deals with common questions in the interpretation of quantum theory about the nature of wavefunction superposition, quantum measurement...

Objective-collapse theories, also known spontaneous collapse models or dynamical reduction models, are proposed solutions to the measurement problem in quantum mechanics...

system, the quantum number is said to be "good", and acts as a constant of motion in the quantum dynamics. In the era of the old quantum theory, starting...

of correlations that can be produced in any theory obeying local realism, and showed that quantum theory predicts violations of this limit for certain...

Loop quantum gravity (LQG) is a theory of quantum gravity that incorporates matter of the Standard Model into the framework established for the intrinsic...

In the interpretation of quantum mechanics, a local hidden-variable theory is a hidden-variable theory that satisfies the principle of locality. These...

these distances, quantum mechanics has a profound effect on physical phenomena. Each theory of quantum gravity uses the term "quantum geometry" in a slightly...

"[elementary] quantum of action", now called the Planck constant. This was a significant conceptual part of the so-called "old quantum theory" developed...

simplest case, the helium atom. The transition from the old quantum theory to full-fledged quantum physics began in 1925, when Werner Heisenberg presented...

absolutely necessary here and cannot be omitted from the interpretation of quantum theory." - Werner Heisenberg, Physics and Philosophy, p. 137 "Was the wave...

classical theory led to a revolution in physics, a shift in the original scientific paradigm: the development of quantum mechanics. Many aspects of quantum mechanics...

theory with respect to quantum information, sometimes referred to as "quantum learning theory". Quantum-enhanced machine learning refers to quantum algorithms...

Bohr–Sommerfeld model. Bohr model Old quantum theory Kramers, Hendrik Anthony (1923). The atom and the Bohr theory of its structure : an elementary presentation...

stationary states for time independence and quantum vacuum states in quantum field theory. As a tool for physics, quantum states grew out of states in classical...