Atomic Physics Seminars

Multimode quantum systems have a high potential interest in many-qubit quantum computation, parallel quantum information processing and quantum metrology. We will show that some properties of multimode quantum states of light are 'intrinsic' , i.e. independent of the choice of the mode basis, and on the other hand that in many instances, it is very useful to identfiy particular modes that simplify the problem under consideration, such as the noise modes or the 'supermodes'. This will be illustrated by examples taken in the domains of 'quantum imaging' ( multi-transverse-mode quantum states) and 'quantum frequency combs' (multi-longitudinal-mode quantum states).