Dressed states refer to quantum states of a system that have been modified due to the presence of an external field or interaction, such as light in cavity quantum electrodynamics. This concept highlights how interactions between atoms and quantized electromagnetic fields can change the energy levels of the system, leading to new effective states that include the influence of these interactions. Dressed states play a crucial role in understanding phenomena like atom-photon interactions and can lead to significant insights in models such as the Jaynes-Cummings model.
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