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Springer proceedings in mathematics & statistics

Algebraic and Quantum Mechanical Approach to Spinors

Tahir Manzoor, S. N. Hasan

Published Nov 15, 2023• 0 citations
Publisher
DOI
10.1007/978-3-031-49218-1_21

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The geometrical meaning of spinors as a key to make sense of quantum mechanics

G. Coddens

This paper aims at explaining that the key to understanding quantum mechanics (QM) is a perfect geometrical understanding of the spinor algebra that is used in its formulation. Spinors occur naturally in the representation theory of certain symmetry groups. The spinors that are relevant for QM are those of the homogeneous Lorentz group SO(3,1) in Minkowski space-time R 4 and its subgroup SO(3) of the rotations of three-dimensional Euclidean space R 3. In the three-dimensional rotation group the spinors occur within its representation SU(2). We will provide the reader with a perfect intuitive insight about what is going on behind the scenes of the spinor algebra. We will then use the understanding acquired to derive the free-space Dirac equation from scratch proving that it is a description of a statistical ensemble of spinning electrons in uniform motion, completely in the spirit of Ballentine's statistical interpretation of QM. This is a mathematically rigorous proof. Developing this further we allow for the presence of an electromagnetic field. We can consider the result as a reconstruction of QM based on the geometrical understanding of the spinor algebra. By discussing a number of problems in the interpretation of the conventional approach, we illustrate how this new approach leads to a better understanding of QM.

•Mar 22, 2021•1 citation

The Geometrical Meaning of Spinors Lights the Way to Make Sense of Quantum Mechanics

G. Coddens

This paper aims at explaining that a key to understanding quantum mechanics (QM) is a perfect geometrical understanding of the spinor algebra that is used in its formulation. Spinors occur naturally in the representation theory of certain symmetry groups. The spinors that are relevant for QM are those of the homogeneous Lorentz group SO(3,1) in Minkowski space-time R4 and its subgroup SO(3) of the rotations of three-dimensional Euclidean space R3. In the three-dimensional rotation group, the spinors occur within its representation SU(2). We will provide the reader with a perfect intuitive insight about what is going on behind the scenes of the spinor algebra. We will then use the understanding that is acquired to derive the free-space Dirac equation from scratch, proving that it is a description of a statistical ensemble of spinning electrons in uniform motion, completely in the spirit of Ballentine’s statistical interpretation of QM. This is a mathematically rigorous proof. Developing this further, we allow for the presence of an electromagnetic field. We can consider the result as a reconstruction of QM based on the geometrical understanding of the spinor algebra. By discussing a number of problems in the interpretation of the conventional approach, we illustrate how this new approach leads to a better understanding of QM.

Symmetry•Apr 12, 2021•4 citations

Mathematical Structures of Quantum Mechanics

Kow-Lung Chang

The Postulates and Principles of Quantum Mechanics Commutability and Compatibility of Quantum Observables Non-Commuting Operators and Uncertainty Principle Quantum Dynamics and Schrodinger Equation Time Evolution Operator and Propagator Symmetry, Transformation and Continuous Groups Lie Groups and Lie Algebras O(3) Group, SU(2) Group and Angular Momentum Dynamical Symmetry and Hydrogen Atom Lorentz Group and Group Representation Chiral Transformation and Spinor Algebra Gamma Matrix Algebra and Discrete Symmetry in Dirac Spinor System.

WORLD SCIENTIFIC eBooks•Oct 1, 2011•12 citations
This paper aims at explaining that the key to understanding quantum mechanics (QM) is a perfect geometrical understanding of the spinor algebra that is used in its formulation. Spinors occur naturally in the representation theory of certain symmetry groups. The spinors that are relevant for QM are those of the homogeneous Lorentz group SO(3,1) in Minkowski space-time R 4 and its subgroup SO(3) of the rotations of three-dimensional Euclidean space R 3. In the three-dimensional rotation group the spinors occur within its representation SU(2). We will provide the reader with a perfect intuitive insight about what is going on behind the scenes of the spinor algebra. We will then use the understanding acquired to derive the free-space Dirac equation from scratch proving that it is a description of a statistical ensemble of spinning electrons in uniform motion, completely in the spirit of Ballentine's statistical interpretation of QM. This is a mathematically rigorous proof. Developing this further we allow for the presence of an electromagnetic field. We can consider the result as a reconstruction of QM based on the geometrical understanding of the spinor algebra. By discussing a number of problems in the interpretation of the conventional approach, we illustrate how this new approach leads to a better understanding of QM.
This paper aims at explaining that a key to understanding quantum mechanics (QM) is a perfect geometrical understanding of the spinor algebra that is used in its formulation. Spinors occur naturally in the representation theory of certain symmetry groups. The spinors that are relevant for QM are those of the homogeneous Lorentz group SO(3,1) in Minkowski space-time R4 and its subgroup SO(3) of the rotations of three-dimensional Euclidean space R3. In the three-dimensional rotation group, the spinors occur within its representation SU(2). We will provide the reader with a perfect intuitive insight about what is going on behind the scenes of the spinor algebra. We will then use the understanding that is acquired to derive the free-space Dirac equation from scratch, proving that it is a description of a statistical ensemble of spinning electrons in uniform motion, completely in the spirit of Ballentine’s statistical interpretation of QM. This is a mathematically rigorous proof. Developing this further, we allow for the presence of an electromagnetic field. We can consider the result as a reconstruction of QM based on the geometrical understanding of the spinor algebra. By discussing a number of problems in the interpretation of the conventional approach, we illustrate how this new approach leads to a better understanding of QM.
The Postulates and Principles of Quantum Mechanics Commutability and Compatibility of Quantum Observables Non-Commuting Operators and Uncertainty Principle Quantum Dynamics and Schrodinger Equation Time Evolution Operator and Propagator Symmetry, Transformation and Continuous Groups Lie Groups and Lie Algebras O(3) Group, SU(2) Group and Angular Momentum Dynamical Symmetry and Hydrogen Atom Lorentz Group and Group Representation Chiral Transformation and Spinor Algebra Gamma Matrix Algebra and Discrete Symmetry in Dirac Spinor System.