A quantum bit, or qubit, is the fundamental unit of quantum information, analogous to a classical bit but with the unique property of existing in a superposition of states. This means a qubit can represent both 0 and 1 simultaneously, allowing quantum systems to perform complex calculations at unprecedented speeds. The manipulation and measurement of qubits are essential for understanding phenomena in advanced quantum technologies, including their interactions within cavity quantum electrodynamics and the Jaynes-Cummings model.
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