scispace - formally typeset
Open AccessJournal ArticleDOI

Space-Time Approach to Non-Relativistic Quantum Mechanics

Richard Phillips Feynman
- 01 Apr 1948 - 
- Vol. 20, Iss: 2, pp 367-387
Reads0
Chats0
TLDR
In this paper, the authors formulated non-relativistic quantum mechanics in a different way and showed that the probability of an event which can happen in several different ways is the absolute square of a sum of complex contributions, one from each alternative way.
Abstract
Non-relativistic quantum mechanics is formulated here in a different way. It is, however, mathematically equivalent to the familiar formulation. In quantum mechanics the probability of an event which can happen in several different ways is the absolute square of a sum of complex contributions, one from each alternative way. The probability that a particle will be found to have a path x(t) lying somewhere within a region of space time is the square of a sum of contributions, one from each path in the region. The contribution from a single path is postulated to be an exponential whose (imaginary) phase is the classical action (in units of ℏ) for the path in question. The total contribution from all paths reaching x, t from the past is the wave function ψ(x, t). This is shown to satisfy Schroedinger's equation. The relation to matrix and operator algebra is discussed. Applications are indicated, in particular to eliminate the coordinates of the field oscillators from the equations of quantum electrodynamics.

read more

Content maybe subject to copyright    Report

Citations
More filters
Journal ArticleDOI

Derivation of the postulates of quantum mechanics from the first principles of scale relativity

TL;DR: In this article, a derivation of quantum mechanics from first principles is proposed in the framework of the theory of scale relativity, which is based on a series of postulates which lead to a very good description of the microphysical realm.
Book ChapterDOI

Atomic Physics Tests of the Basic Concepts in Quantum Mechanics

TL;DR: Party and Freedman as discussed by the authors reviewed the present conceptual basis for quantum mechanics and then described the experiments that have been carried out to test these concepts and the relevant experiments are precision measurements of the predicted eigenvalue spectrum, single-photon interference experiments, successive measurements on eigenstates, measurements of photonphoton and spin correlations as a test of Bell's inequality, and the observation of the sign change for the rotation of the neutron through 2π rad.
Journal ArticleDOI

The density in density functional theory

TL;DR: In this article, the electron density given by Schrodinger in 1926 and its use and many applications directed at the understanding of the properties of matter to its present day role in density functional theory and the development of the quantum mechanics of an open system.
Journal ArticleDOI

The goldstone theorem and dynamical rearrangement of symmetry in the path - integral formalism

TL;DR: In this article, the spontaneous breakdown of symmetry is investigated in the path-integral formalism, where the generating functional is modified by the addition of a limiting "ϵ term" which fixes the direction of the breaking.
Book

An Invitation to Quantum Field Theory

TL;DR: Theories and Lagrangian I: Matter Fields, Lagrangians II: Introducing Gauge Fields, Theories and Lrangian II: The Standard Model, and Towards Computational Rules: Feynman Diagrams as mentioned in this paper.