Quantum States describe the complete physical information of a quantum system. They encode all measurable properties and determine the probabilities of different measurement outcomes. Quantum states can be represented mathematically using wave functions or state vectors in Hilbert space. Pure states describe systems with maximum information, while mixed states represent statistical ensembles. Quantum states exhibit non-classical features such as superposition and entanglement. Their evolution over time is governed by fundamental quantum equations. Understanding quantum states is essential for interpreting experiments and designing quantum technologies. Manipulation and control of quantum states underpin quantum computation, communication, and precision measurement. Quantum states form the foundational concept upon which all quantum theory is built.
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