Role of Anti-Hermitian operators in Copenhagen interpretation of QM

Question

One of the postulates of Copenhagen interpretation of quantum mechanics is that every observable has a Hermitian operator A. With these operators we can then find eigenvalues of observables, make a time-evolution of a wave function and, in general, calculate the properties of the system.

However we also introduce anti-Hermitian operators. My question is: What is the use for anti-Hermitian operators, if observables are described with Hermitian operators?

NOTE: I am just diving into the subject of Quantum mechanics, so I hope this question makes sense and is not "too basic".

Notice that in complex quantum mechanics, any Hermitian operator $X$ can be turned into an anti-Hermitian one $iX$. The exponentiation of the latter gives a unitary transformation. An example of this is the exponentiation of $i H$ where $H$ is the Hamiltonian of the system, giving time evolution. — QuantumFieldMedalist, Jun 01 '23 at 20:51
Does this answer your question? The dual role of (anti-)Hermitian operators in quantum mechanics — DanielC, Jun 01 '23 at 20:56
I think the linked question answers mine, thank you. However, just to clarify, anti-Hermitian operators are used (in general) as generators for unitary transformations to preserve Hilbert space structure, as Hermitian operators represent observables in quantum mechanical space? (Speaking very generally)? — Murg, Jun 01 '23 at 21:02

Role of Anti-Hermitian operators in Copenhagen interpretation of QM

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