Project Description
We are seeking candidates for one PhD fellowship at the Center for Theoretical Physics PAS under the research project SONATA BIS entitled "Characterization and Certification of Quantum Resources", funded by the National Science Center (grant UMO-2019/34/E/ST2/00369).
Quantum correlations, such as quantum entanglement and Bell nonlocality, constitute fundamental, if not the most essential, resources in quantum information theory. They find applications, among others, in secure key distribution.
With the dynamic development of quantum technologies – including random number generators and quantum computing devices – the problem of in-depth quantum resource characterization in real physical systems is increasingly important, such as:
- multipartite quantum states
- quantum networks, i.e., systems composed of nodes connected by classical channels and entanglement sources
Another fundamental challenge is the certification and validation of quantum devices – verifying that they operate according to specifications, harness quantum effects, and produce correct outcomes.
The key question is whether a given device:
- operates on the designated quantum state
- performs the specified quantum operations
Of particular importance is the device-independent approach, where Bell nonlocality is the central phenomenon enabling certification.
PhD Candidate Tasks
- Development of methods for characterization and detection of quantum entanglement and Bell nonlocality in multipartite systems and quantum networks, with special attention to systems of arbitrary subsystem dimensions;
- Applying Bell nonlocality to design experimentally implementable methods for certifying entangled quantum states and quantum measurements (so-called self-testing).
