According to the postulates of quantum mechanics, how are observables ...
- In quantum mechanics, the measurable quantities (observables) like position, momentum, etc., are associated with corresponding operators.
- The reason for associating Hermitian operators with observables lies in their mathematical properties.
- The eigenvalues of a Hermitian operator are always real, which is a requirement for all measurements in physics (as we cannot measure complex values in an experiment).
- Therefore, to every observable in classical mechanics, we can assign a corresponding Hermitian operator in quantum mechanics.
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According to the postulates of quantum mechanics, how are observables ...
Observable and Operator Relationship in Quantum Mechanics
Observable Associated with Hermitian Operator:
- According to quantum mechanics, observables such as position, momentum, energy, etc., are represented by operators.
- Every observable in quantum mechanics is associated with a corresponding Hermitian operator.
- Hermitian operators have special properties that ensure the observables are real and have well-defined eigenvalues.
Properties of Hermitian Operators:
- Hermitian operators have real eigenvalues, which correspond to the possible outcomes of measurements of observables.
- The eigenvectors of Hermitian operators form a complete set, allowing for the expansion of any state in terms of these eigenvectors.
- Hermitian operators play a crucial role in determining the probabilistic outcomes of measurements in quantum systems.
Significance of Hermitian Operators:
- The association of observables with Hermitian operators is a foundational concept in quantum mechanics that allows for the prediction and understanding of quantum phenomena.
- The properties of Hermitian operators ensure that observables in quantum systems behave in a consistent and predictable manner.
Therefore, the relationship between observables and operators in quantum mechanics is that each observable is associated with a Hermitian operator, highlighting the deep connection between measurements and mathematical operators in the quantum realm.