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p
 physical constant
The constant c, the speed of light in a vacuum, is an example of a physical constant. It is a constant of nature, always(...)  Read More
 pi
Pi is symbolized π and pronounced like "pie." It is the mathematical symbol for the number 3.14159…, which goes on(...)  Read More
 Pilot Wave Interpretation of quantum mechanics
This interpretation of quantum mechanics is also called the "Bohmian Interpretation." It was originally proposed by(...)  Read More
 probability amplitude
“Probability amplitude” is a term used in quantum physics. It’s a number that appears in Schrodinger’s Wave Equation. Let’s(...)  Read More
 probability wave
Max Born, one of the early quantum physicists in the 1920's and '30s, proposed that between detections, quantum particles(...)  Read More

q
 QFT
See Quantum Field Theory.  Read More
 quantities of dimension one
For “quantities of dimension one,” see “dimensionless number.”  Read More
 quantum
One definition of “quantum” is: a tiny packet of energy at the atomic level. A quantum is the smallest possible unit of(...)  Read More
 quantum angular momentum
For quantum angular momentum, see angular momentum.  Read More
 quantum decoherence
For quantum decoherence, see decoherence.  Read More
 quantum entanglement
In quantum physics, if two particles are entangled, their behavior is correlated. In addition, if a physicist obtains(...)  Read More
 Quantum Field Theory
Quantum Field Theory (QFT) is the current theory of how atomic and subatomic particles behave. It is the most uptodate(...)  Read More
 quantum mechanics
In quantum mechanics, physicists study how tiny particles behave. These include atoms, the components of atoms like(...)  Read More
 quantum number
Electrons have a few handfuls of properties. Four have been selected as the electron’s “quantum numbers.” The quantum(...)  Read More
 quantum physics
For an understanding of quantum physics, see the definition of "quantum mechanics." Often, the two terms are used to mean(...)  Read More
 quantum randomness
Many quantum physicists view quantum mechanics as differing from classical physics in a fundamental way—quantum mechanics is(...)  Read More
 quantum realm
A number of interpretations of quantum mechanics postulate a “quantum realm.” These include the Transactional(...)  Read More
 quantum spin
See "spin."  Read More
 quantum theory
“Quantum theory” is the original name for the field that became known as “quantum mechanics" (which see). The connotations(...)  Read More
 quantum world
See quantum realm.  Read More