Speaker
Description
A key feature of quantum physics is quantum entanglement. It is for example needed for quantum steering. In a standard quantum steering scenario there is a trusted party, meaning that their measurement device is well characterised, and an untrusted party, meaning that their measurement device is treated like a black box. Low dimensional entanglement between two parties has been studied extensively. However, many findings cannot be extrapolated to multiple parties and moreover, increasing the dimensions of the systems allows for more complex entanglement structures.
We are interested in characterising high-dimensional entanglement in a network through quantum steering. One such example is a triangle network with only one trusted party, or more generally a line network with some trusted parties. We investigate what can be deduced about the strength of entanglement between the different nodes of the network in such scenarios. We are especially interested in entanglement dimensionality, i.e. how many levels can be certified to be entangled, and entanglement robustness, i.e. how tolerant to noise is the entanglement.
