Dr. Fangwei Si

Assistant Professor

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Biography

Fangwei Si is an Assistant Professor in the Department of Physics at Carnegie Mellon University, where he aims to uncover the biological laws that help understand living systems in a quantitatively precise manner. His research focuses on developing and adapting tools for rigorous measurements to define new concepts in biological physics. Currently, he studies the fundamental rules that connect the complex forms of bacterial cells to their fitness in varying environments, with particular attention to the interactions between bacteria and phages. His work employs single-cell microfluidics imaging and perturbation experiments to quantify basic membrane properties and the organization of membrane proteins, which are crucial for determining growth rates and adaptability to new environments. Furthermore, he investigates the physiological implications of bacterial-phage interactions and how these dynamics can offer insights into microbial growth at both single-cell and community levels.

Research Interests

Experience

Cooper-Siegel Assistant Professor

2024-01-01 — Present

Carnegie Mellon University • Pittsburgh, PA

Conducting research in biological physics with a focus on bacterial cells and their interactions.

Assistant Professor

2022-01-01 — Present

Carnegie Mellon University • Pittsburgh, PA

Teaching and researching in the Department of Physics.

Postdoctoral Researcher

2020-01-01 — 2022-01-01

Scripps Research Institute • La Jolla, CA

Conducted postdoctoral research in the Department of Integrative Structural and Computational Biology.

Postdoctoral Researcher

2015-01-01 — 2020-01-01

University of California, San Diego • La Jolla, CA

Conducted research in the Department of Physics and Section of Molecular Biology.

Requirements for Carnegie Mellon University

Doctorate Program
Requirements
GPA Requirement
Required:3.5
GRE General
Verbal
Required:158
Quantitative
Required:149
Analytical Writing
Required:4
Overall
Required:4
Prerequisites
Bachelor's degree in Psychology or related field Research experience/publications
Application Checklist
  • Online application
  • Statement of Purpose
  • Three letters of recommendation
  • Transcripts
  • GRE scores (optional but reported in profile)
  • English Proficiency (TOEFL/IELTS/Duolingo)
Specialization Notes

Admission is extremely competitive with no strict GPA cut-offs; holistic review is used.