Joey Chan

University of Illinois Urbana-Champaign

Urbana-Champaign, Illinois

Hi! I’m Joey Chan, a Ph.D. candidate in Computer Science at the University of Illinois Urbana-Champaign (UIUC). I’m advised by Prof. Yue Guo and co-advised by Prof. Jiawei Han.

I’m an Amazon AI PhD Fellow and currently an Applied Scientist at Amazon on the JONAS team.

My research lies at the intersection of large language models, information retrieval, agentic AI, and AI for science and healthcare. I study how language models can leverage external knowledge, structured scientific information, and user context to reason over complex biomedical problems and support scientific discovery.

I’m particularly interested in retrieval-augmented and agentic systems for personalized health, drug discovery, and computational biology.

news

Jan 15, 2016	A simple inline announcement with Markdown emoji!
Nov 07, 2015	A long announcement with details
Oct 22, 2015	A simple inline announcement.

selected publications

PhysRev

Can Quantum-Mechanical Description of Physical Reality Be Considered Complete?

A. Einstein^*†, B. Podolsky^*, and N. Rosen^*

Phys. Rev., New Jersey. More Information can be found here , May 1935

Abs DOI HTML PDF Video

In a complete theory there is an element corresponding to each element of reality. A sufficient condition for the reality of a physical quantity is the possibility of predicting it with certainty, without disturbing the system. In quantum mechanics in the case of two physical quantities described by non-commuting operators, the knowledge of one precludes the knowledge of the other. Then either (1) the description of reality given by the wave function in quantum mechanics is not complete or (2) these two quantities cannot have simultaneous reality. Consideration of the problem of making predictions concerning a system on the basis of measurements made on another system that had previously interacted with it leads to the result that if (1) is false then (2) is also false. One is thus led to conclude that the description of reality as given by a wave function is not complete.