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jaketodd
Gold Member
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Do you need a magnetic field for EIT, or just two electromagnetic beams with the right attributes?
Thanks,
Jake
Thanks,
Jake
mfb said:If I remember correctly, you need some Zeeman splitting. The magnetic field of Earth is sufficient, and you can use EIT to measure its field strength.
Quick Electromagnetically Induced Transparency (QEIT) is a phenomenon in which the absorption of light in a medium can be dramatically reduced by applying a control field. This allows for the creation of transparent regions in the medium, allowing light to pass through without being absorbed.
QEIT works by using a control field, typically a laser beam, to manipulate the energy levels of atoms in the medium. This creates a two-level system in which the absorption of light is greatly reduced. This effect is temporary and can be switched on and off by controlling the intensity and frequency of the control field.
QEIT has many potential applications in fields such as quantum computing, optical data storage, and telecommunications. It can also be used in sensors and detectors for more accurate measurements. Additionally, the ability to control the transparency of a medium can be useful in creating optical switches and filters.
One limitation of QEIT is that it typically requires very low temperatures for the medium, making it difficult to use in practical applications. Additionally, the control field used can sometimes cause unwanted heating in the medium, affecting the transparency of the system. Finally, the duration of the transparency effect is limited, making it necessary to continually apply the control field to maintain the desired transparency.
QEIT is related to other quantum phenomena such as electromagnetically induced transparency (EIT) and coherent population trapping (CPT). These all involve manipulating the energy levels of atoms in a medium to control the absorption and transmission of light. However, QEIT is typically faster and can be achieved at higher temperatures compared to EIT and CPT.