Search type Search syntax
Tags [tag]
Exact "words here"
Author user:1234
user:me (yours)
Score score:3 (3+)
score:0 (none)
Answers answers:3 (3+)
answers:0 (none)
isaccepted:yes
hasaccepted:no
inquestion:1234
Views views:250
Code code:"if (foo != bar)"
Sections title:apples
body:"apples oranges"
URL url:"*.example.com"
Saves in:saves
Status closed:yes
duplicate:no
migrated:no
wiki:no
Types is:question
is:answer
Exclude -[tag]
-apples
For more details on advanced search visit our help page
Results tagged with
Search options not deleted user 160858

In physics, an operator is almost always either a square matrix or a linear mapping between two function spaces (defined on, say, $\mathbb R^n$). Operators serve as observables and as time evolution operators in Quantum Mechanics. This tag will most often find valid use in quantum mechanics; don't use this tag just because your equations contain "everyday operations" like $\times$, $+$!

0 votes
2 answers
131 views

Demonstration of a property of the adjoint operator in Quantum Mechanics

I would like to demonstrate the following property: $$(|\psi\rangle\langle\phi|)^{\dagger}=|\phi\rangle\langle\psi|$$ The other properties that concern the adjoint operator I have already been …
2 votes
1 answer
533 views

Eigenvalues, Hermitian operators and observables in quantum mechanics

Consider a hermitian operator. So a) in a space of infinite dimension its eigenvectors are a base. b) in a finite-dimensional space the matrix that represents the hermitian operator is always diagon …
-1 votes
1 answer
269 views

Property of the adjoint operator in the array element

In Quantum Mechanics how can I prove this property? $$<\psi|A^{\dagger} |\phi>=<\phi|A|\psi>^{*}$$