Quantifying Synergy in Quantum Channels
Join us for an AESS Technical Talk by Dr. Kyunghoon Han of the University of Luxembourg!
Time and Location
November 27, 2025, 5:30 pm
ME 4463 (Maker Lab), Mackenzie Building, Carleton University (in person)
Abstract
In classical and quantum information-theoretic settings, partial information decomposition isolates unique, redundant and synergistic contributions, formalising more-than-the-parts information from multiple inputs. Quantum technologies already exploit collective effects, yet a unified, n-channel, synergy-aware decomposition remains absent.
The talk introduces a channel-level synergy functional, Syn, defined in the Stinespring representation so that it is representation-free, invariant under local unitaries, monotone under completely positive trace-preserving maps, and compositional under series, parallel and product wiring. Syn augments the Neyman-Pearson theorem by supplying a channel-level criterion that certifies when a single joint decision statistic will outperform all separable strategies. (This includes joint measurements where the subsystems are not measured simultaneously.) Consequently, it provides provable strengthening of the receiver operating characteristic over the operational false-alarm region and, in bosonic radar, translates into either achieving the same detection probability with lower transmitted energy or attaining tighter false-alarm levels at a fixed power.
Date and Time
Location
Hosts
Registration
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- Carleton University
- 1125 Colonel By Drive
- Ottawa, Ontario
- Canada
- Building: Mackenzie
- Room Number: ME 4463 (Maker Lab)
- Starts 11 November 2025 05:00 AM UTC
- Ends 27 November 2025 10:30 PM UTC
- No Admission Charge
Speakers
Dr. Kyunghoon Han
Biography:
Kyunghoon Han received the B.Math. degree in pure mathematics and mathematical physics (double major) from the University of Waterloo, Waterloo, ON, Canada, in 2014, the M.Sc. degree in theoretical physics (nonlinear models) from the l’Université de Tours, Tours, France, in 2017, and the Ph.D. degree in physics at the University of Luxembourg, Esch-sur-Alzette, Grand Duchy of Luxembourg, in 2025.
Currently, he is a postdoctoral researcher at the University of Luxembourg. From 2019 to 2021, he was an AI scientist and Head of Research at a Seoul-based start-up, SRuniverse, where he helped develop a set of AI-modules composing everything a human celebrity would need: multilingual voice generator, lip-syncing module, facial feature generation, movement models, personality generation, singing capabilities, etc.
His research interests include geometric descriptions of molecular dynamics, information theoretic understanding of dynamical systems, fat manifold descriptions of dynamical systems, biomolecular dynamics, molecular system simulations, mathematical foundations of chemistry, chemical bond models, harmonic analysis and its applications in dynamical systems, spectral theory, and the connection between chemistry and category theory.
Email:
Address:University of Luxembourg, 2, place de l’Université, Esch-sur-Alzette, Luxembourg