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Hilbert-space
New post in Hilbert-space
Mutual or same set of eigenfunctions if two Hermitian operators commute
August 1st, 2022
quantum-mechanics
linear-algebra
commutator
operators
hilbert-space
Are all scattering states un-normalizable?
August 20th, 2020
hilbert-space
scattering
operators
quantum-mechanics
mathematical-physics
Example of compact operators in quantum mechanics
December 23rd, 2021
hilbert-space
operators
mathematical-physics
quantum-mechanics
How to make rigorous the idea of a continuous complete set?
January 6th, 2021
dirac-delta-distributions
hilbert-space
mathematical-physics
quantum-mechanics
Existence of adjoint of an antilinear operator, time reversal
February 14th, 2020
quantum-mechanics
operators
hilbert-space
notation
time-reversal-symmetry
How is a bound state defined in quantum mechanics?
December 28th, 2021
quantum-states
superposition
definition
hilbert-space
quantum-mechanics
Boosts are non-unitary!
December 20th, 2020
representation-theory
group-theory
hilbert-space
special-relativity
quantum-field-theory
Does "natural" superposition of particles exist?
May 4th, 2020
quantum-computer
superposition
hilbert-space
quantum-information
quantum-mechanics
Why do eigenvalues correspond to observable quantities?
November 17th, 2020
quantum-measurements
quantum-mechanics
hilbert-space
operators
observables
When we define the S-matrix, what are "in" and "out" states?
November 4th, 2020
quantum-field-theory
scattering
hilbert-space
s-matrix-theory
Where does the Born rule come from?
August 1st, 2022
quantum-mechanics
hilbert-space
probability
complex-numbers
born-rule
Quantum Joke (not a real joke, not a riddle)
November 30th, 2020
quantum-mechanics
hilbert-space
superposition
quantum-states
How should Dirac notation be understood?
August 1st, 2022
quantum-mechanics
hilbert-space
normalization
Is purification physicaly meaningful?
August 22nd, 2020
quantum-mechanics
hilbert-space
quantum-information
density-operator
Definition of an operator in quantum mechanics
July 3rd, 2020
quantum-mechanics
operators
hilbert-space
definition
matrix-elements
Is hermiticity a basis-dependent concept?
August 1st, 2022
hilbert-space
observables
quantum-mechanics
operators
Is every observable a function of position and momentum?
October 3rd, 2020
quantum-mechanics
operators
hilbert-space
observables
phase-space
Why we use $L_2$ Space In QM?
October 30th, 2020
quantum-mechanics
integration
hilbert-space
mathematical-physics
Motivation to introduce von Neumann algebras in addition to $C^*$algebras?
September 26th, 2020
hilbert-space
operators
mathematical-physics
quantum-field-theory
Schrödinger equation in position representation
June 30th, 2020
hilbert-space
operators
wavefunction
mathematical-physics
quantum-mechanics
Position operator in QFT
October 22nd, 2020
homework-and-exercises
quantum-field-theory
operators
hilbert-space
fourier-transform
Path integral derivation of the state-operator correspondence in a CFT
December 24th, 2020
quantum-field-theory
hilbert-space
conformal-field-theory
path-integral
What does it mean to apply an operator to a state?
December 10th, 2020
quantum-states
wavefunction-collapse
hilbert-space
operators
quantum-mechanics
Advantages of using bra-ket notation
April 15th, 2021
quantum-mechanics
hilbert-space
notation
Basis independence in Quantum Mechanics
August 1st, 2022
quantum-mechanics
hilbert-space
vectors
Bra-Ket Notation
November 10th, 2020
quantum-mechanics
hilbert-space
notation
Klein-Gordon inner product
August 1st, 2022
quantum-field-theory
klein-gordon-equation
poincare-symmetry
hilbert-space
Expectation of momentum in the bound state
August 23rd, 2021
quantum-mechanics
operators
momentum
hilbert-space
Scattering vs bound states
August 28th, 2021
wavefunction
hilbert-space
quantum-mechanics
scattering
schroedinger-equation
Scattering states of Hydrogen atom in non-relativistic perturbation theory
August 1st, 2022
perturbation-theory
hydrogen
hilbert-space
scattering
quantum-mechanics
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