Quantum foundations
We study the structure of quantum measurement and correlation itself — nonlocality, entanglement witnesses, and the weak and modular values that describe what postselection and measurement backaction let us learn about a quantum state.
This foundational work feeds directly back into our metrology and algorithms research, since precision and control both run up against the same fundamental limits.
Related publications
Two-time approach to past-future quantum dynamics: formalism and applications
Advanced Physics Research, e00099 (2025)
Physical Review Research 7, 013239 (2025)
Quantum backaction effects in sequential measurements
Annals of Physics 453, 169310 (2023)
No-go result for quantum postselection measurements of a rank-m degenerate subspace
Physical Review A 107, 042204 (2023)
Increased success probability in Hardy's nonlocality: theory and demonstration
Physical Review A 107, 042210 (2023)
Error-disturbance uncertainty relations in Faraday measurements
Physical Review A 105, 052228 (2022)
Direct state measurements under state-preparation-and-measurement errors
Quantum Information Processing 20, 197 (2021)
Systematic errors in direct state measurements with quantum controlled measurements
Journal of Physics B: Atomic, Molecular and Optical Physics 53, 115501 (2020)
Improving direct state measurements by using rebits in real enlarged Hilbert spaces
Physics Letters A 383, 289-294 (2019)
Quantum Information Processing 18, 206 (2019)
Various pointer states approaches to polar modular values
Journal of Mathematical Physics 59, 042104 (2018)
Quantum weak and modular values in enlarged Hilbert spaces
Physical Review A 97, 012112 (2018)
Generalized modular-value-based scheme and its generalized modular value
Physical Review A 95, 032135 (2017)
Full characterization of modular values for finite-dimensional systems
Physics Letters A 380, 2129-2135 (2016)