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The Propagator
Lesson 28 of 32 • 0 upvotes • 14:22mins
Siddharth Sahu
In quantum mechanics and quantum field theory, the propagator is a function that specifies the probability amplitude for a particle to travel from one place to another in a given time, or to travel with a certain energy and momentum. In Feynman diagrams, which serve to calculate the rate of collisions in quantum field theory, virtual particles contribute their propagator to the rate of the scattering event described by the respective diagram. These may also be viewed as the inverse of the wave operator appropriate to the particle, and are, therefore, often called (causal) Green's functions (called "causal" to distinguish it from the elliptic Laplacian Green's function).[1][2]
(Hindi) Quantum Mechanics: GATE (Physics)
32 lessons • 4h 43m
1
Linear Vector Spaces (in Hindi)
8:41mins
2
Dual Vector Spaces (in Hindi)
8:55mins
3
Inner Product and Norm of a Vector (in Hindi)
11:14mins
4
Linearly Independent Vectors (in Hindi)
5:39mins
5
Dimension of a Vector Space and Orthonormal Basis (in Hindi)
10:56mins
6
Gram-Schmidt Orthonormalization (in Hindi)
11:10mins
7
Problem Solution Of Lecture 06
5:26mins
8
Pauli Matrix As Basis
13:18mins
9
Linear Transformation as Matrix
15:00mins
10
Matrix as Linear Transformation : 02
5:40mins
11
Linear Operator
13:00mins
12
The Projection Operator
7:42mins
13
Matrix Elements Of Linear Operator
6:49mins
14
Operator Spaces
6:15mins
15
Adjoint Of An Operator
11:05mins
16
Span of LVS
5:31mins
17
Hermition, Anti-Hermition And Unitary Operators
8:09mins
18
Problem Solutions Lec. 17
3:26mins
19
Active And Passive Transformation
6:52mins
20
Eigen Vector And Eigen Values
10:20mins
21
The Eigen Value Problem
15:00mins
22
EigenValues Of Hermition Matrices
5:10mins
23
Degeneracy
8:11mins
24
Spectral Theorem Of Unitary Operators
9:33mins
25
Change Of Basis
9:00mins
26
Diagonalization Of Matrix & Eigen Basis
10:12mins
27
Diagonalization Of Hermition Matrix
8:40mins
28
The Propagator
14:22mins
29
The Propagator Part 2
4:06mins
30
Functions Of Operators
6:17mins
31
Derivatives Of Operators
8:06mins
32
Concept of Infinite Dimensional Vector Spaces
9:12mins
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