As part of the QDNL Visitor’s Programme, Simon Höfer, a PhD candidate at the Université Grenoble Alpes, Laboratoire d’Informatique de Grenoble (LIG), visited the University of Amsterdam. The purpose of his five-month-long visit was to collaborate with Florian Speelman on research into non-local quantum computation (NLQC), a key area for quantum position verification (QPV) and quantum cryptography. Their joint work explored the amount of entanglement required to perform distributed quantum operations and how this varied based on the type of quantum operation performed.

During the visit, the pair developed new theoretical results that compare the complexity of different NLQC tasks. Their findings, which will appear in the upcoming paper, “Equivalence of non-local computation tasks beyond Clifford operations”, show that all single-qubit f-measure protocols have essentially equivalent entanglement costs.

The collaboration also revealed that certain multi-qubit non-Clifford operations can be implemented nearly as efficiently as simpler quantum operations in this setting. The findings will help extend our understanding of the fundamental limits of quantum cryptography and could inform the design of future quantum communication protocols.

Beyond the research, Simon also met with Llorenç Escolà Farràs, a leading researcher in quantum position verification. The visit and collaborations helped strengthen connections among experts working in this emerging field.

The QDNL Visitor Programme supports knowledge exchanges to foster collaboration and accelerate innovation across Europe’s growing quantum ecosystem.