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Operators
New post in Operators
Commutator with Pauli spin matrices and the momentum operator
August 1st, 2020
homework-and-exercises
operators
quantum-spin
commutator
quantum-mechanics
Help trying to understand why the matrix representation of $J^2$ is what it is
May 15th, 2020
representation-theory
hilbert-space
operators
angular-momentum
quantum-mechanics
What are the Eigenstates and Eigenvalues?
June 11th, 2020
operators
quantum-mechanics
linear-algebra
eigenvalue
hilbert-space
How to prove that the position operator in momentum is $i\hbar \partial/\partial p$ - One Missing Sign
February 10th, 2020
fourier-transform
operators
homework-and-exercises
quantum-mechanics
Compatible Observables
August 1st, 2022
quantum-mechanics
measurement-problem
operators
observables
commutator
How to calculate the quantum expectation of frequency of a particle?
August 1st, 2022
operators
hamiltonian
frequency
quantum-mechanics
Complex conjugate of momentum operator
April 26th, 2020
quantum-mechanics
operators
wavefunction
momentum
hilbert-space
Commutator expectation value in quantum mechanics
October 21st, 2020
operators
hilbert-space
mathematical-physics
commutator
quantum-mechanics
Intuition on the GNS construction and how it relates to usual quantum mechanics
August 1st, 2022
definition
hilbert-space
operators
mathematical-physics
quantum-mechanics
Is Del (or Nabla) an operator or a vector?
January 28th, 2020
differentiation
notation
vectors
operators
Can operators be argument of Dirac Delta function
August 22nd, 2020
quantum-mechanics
dirac-delta-distributions
operators
mathematical-physics
How the position operator and the position basis are correctly defined?
September 20th, 2020
mathematical-physics
quantum-mechanics
operators
hilbert-space
Are quantum operators dimensionless?
June 10th, 2020
quantum-mechanics
dimensional-analysis
units
operators
Lower bound on energy is potential minimum
May 1st, 2021
energy
hamiltonian
potential-energy
operators
quantum-mechanics
Glauber's Formula
August 4th, 2020
commutator
operators
homework-and-exercises
quantum-mechanics
How do annihilation and creation operators act on fermions?
November 2nd, 2020
quantum-field-theory
operators
hilbert-space
quantum-electrodynamics
fermions
Can expectation value be imaginary?
February 22nd, 2020
hilbert-space
quantum-mechanics
wavefunction
operators
The uncertainty in angular momentum
August 1st, 2022
quantum-mechanics
angular-momentum
operators
heisenberg-uncertainty-principle
How should I interpret the expectation value $\langle x p\rangle$ in quantum mechanics?
February 17th, 2020
quantum-mechanics
quantum-interpretations
operators
What is a local operator in quantum mechanics?
October 21st, 2021
locality
non-locality
quantum-mechanics
operators
symmetry
Can we solve the particle in an infinite well in QM using creation and annihilation operators?
August 1st, 2022
potential
operators
schroedinger-equation
quantum-mechanics
Commutator of fermionic operators
August 1st, 2022
homework-and-exercises
operators
commutator
quantum-mechanics
Interpreting some domain issues of (potential) momentum operators
October 27th, 2020
hilbert-space
momentum
operators
mathematical-physics
quantum-mechanics
Lorentz force derivation in quantum mechanics
August 1st, 2022
quantum-mechanics
homework-and-exercises
electromagnetism
operators
commutator
Where does the partial derivative come from in Sakurai's derivation of the momentum operator?
August 1st, 2022
momentum
operators
quantum-mechanics
How does the proof of operator commutativity work with non-continuous operators?
April 13th, 2020
commutator
hilbert-space
operators
mathematical-physics
quantum-mechanics
Are eigenstates of the position operator continuous?
August 27th, 2020
quantum-mechanics
observables
hilbert-space
operators
Annihilation and Creation operators not hermitian
January 18th, 2020
quantum-mechanics
operators
How does a linear operator act on a bra?
August 1st, 2022
linear-algebra
notation
operators
quantum-mechanics
hilbert-space
Derivative of the product of operators and Derivative of exponential
December 27th, 2020
differentiation
operators
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