A quantum state is a fundamental concept in quantum mechanics that describes the state of a quantum system. It encapsulates all the information about the system and can be represented in several ways, such as: 1. **Wave Function**: In non-relativistic quantum mechanics, a quantum state can be represented by a wave function, usually denoted by the Greek letter psi (Ψ).
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A pure quantum state is a ray in a complex Hilbert space and may be represented by a normalized state vector.
