Definitions of eigenstate, eigenvalue and eigenfunction?

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SUMMARY

In quantum mechanics, an operator A represents a physical observable, with eigenstates, eigenvalues, and eigenfunctions being fundamental concepts. The eigenfunction, denoted as 'f', satisfies the eigenvalue equation Af = λf, where λ represents the eigenvalue. The Hamiltonian operator, which corresponds to the total energy of the system, acts on the eigenfunction to yield a constant multiple of itself, indicating that solutions consist of an infinite set of eigenfunctions and associated energy eigenvalues, indexed by quantum numbers. Understanding the space on which operator A acts is crucial for defining these terms accurately.

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  • Basic understanding of quantum mechanics principles
  • Familiarity with operators in mathematical physics
  • Knowledge of the Schrödinger equation
  • Concept of quantum numbers in quantum systems
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  • Study the mathematical formulation of the Schrödinger equation
  • Explore the role of the Hamiltonian operator in quantum mechanics
  • Learn about the significance of quantum numbers in eigenvalue problems
  • Investigate the relationship between eigenstates and physical observables
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Students of quantum mechanics, physicists, and anyone interested in the mathematical foundations of quantum theory will benefit from this discussion.

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Homework Statement


In quantum mechanics a physical observable is represented by an operator A.
Define the terms eigenstate, eigenvalue and eigenfunction of a quantum
mechanical operator.

Homework Equations


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The Attempt at a Solution


I think I know in that eq 'f' is the eigenfunction, and lambda is the eigenvalue, but I have no idea how to write in words what they actually are, and that still leaves the question of what an eigenstate is...

Any help would be appriciated
 
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The Schrödinger's time independent equation can be written as Af =λf.
This means that rhe Hamiltonian(or total energy operator) operating on f gives a contant times f.This is an example of an eigenvalue equation.Solutions are an infinite set of eigenfunctions fn and associated energy eignenvalues λn.The subscript n is the quantum number.
 
First define the space (set) the operator A acts on. Then you should immediately know what 'f' stands for and what 'lambda' is. As for the <eigenstate> concept, you'd have to take the arbitrary A as the Hamilton operator for a quantum system.
 
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