Quantum optics with high potential also for medicine
If one makes use of the effect of the entanglement of photons, quantum optics allows, among other things, to make things visible that could not be represented by classical optical methods. In medicine, quantum optics can thus help in the analysis of biological samples, for example: Exposure to certain wavelengths can damage tissue samples - in the worst case, living organisms in the sample are completely killed. To prevent this, the sample can be analyzed using imaging quantum optics.
A single particle of light is converted into two interconnected particles via optical processes. Both light particles can have different wavelengths but share all the information captured by the particles. In this way, a tissue sample can be analyzed at a wavelength that is unproblematic for the sample, while the second light particle is read by a sensor, for example. This is how special information can be obtained from the sample that would have remained hidden to classical optics.