# Physics

## Ph.D.

I graduated from the University of Calfornia, Berkeley in 2013 with a Ph.D. in theoretical physics. My advisor was Birgitta Whaley.

## Research

My dissertation research was on the role of electronic quantum coherence in photosynthetic energy transfer:

- Does quantum coherence contribute to biological function in photosynthesis?
- How can we use statistics, optimization and quantum information theory to design ultrafast spectroscopy experiments on photosynthetic pigment-protein complexes?

My main model system was the Fenna-Matthews-Olson complex of green sulfur bacteria (shown above).

My work involved developing new mathematical techniques, more efficient computational methods and research software (mostly in Python). I collaborated with researchers in Taiwan, Germany, New York and Berkeley, wrote 6 papers and presented at 12 conferences. For the last three years of my program, I was supported by a fellowship from the US Department of Energy. I spent summer 2010 as an EAPSI fellow at National Taiwan Unviersity.

## Publications

- S Jang, S Hoyer, G Fleming, KB Whaley.
**Generalized Master Equation with Non-Markovian Multichromophoric FĂ¶rster Resonance Energy Transfer for Modular Exciton Densities**, Phys Rev Lett**113**, 188102 (2014). arXiv:1311.2091 - S Hoyer, F Caruso, S Montangero, M Sarovar, T Calarco, MB Plenio, KB Whaley,
**Realistic and verifiable coherent control of excitonic states in a light harvesting complex**, New J Physics**16**, 045007 (2014). arXiv:1307.4807 - S Hoyer and KB Whaley,
**Inverting pump-probe spectroscopy for state tomography of excitonic systems**, J Chem Phys**138**, 164102 (2013), arXiv:1209.6625. Mathematica source for dimer model in Sec. IV(A). - S Hoyer, A Ishizaki and KB Whaley,
**Spatial propagation of excitonic coherence enables ratcheted energy transfer**, Phys Rev E**86**, 041911 (2012), arXiv:1106.2911 - S Hoyer, M Sarovar and KB Whaley,
**Limits of quantum speedup in photosynthetic light harvesting**, New J Phys**12**, 065041 (2010), arXiv:0910.1847 - S Hoyer and DA Meyer,
**Faster transport with a directed quantum walk**. Phys Rev A**79**, 024307 (2009), arXiv:0901.1007. Mathematica source for Fig. 2.

See my Google Scholar profile.

## Writing from Swarthmore

At Swarthmore College, I majored in physics and minored in mathematics. Here are my final projects for each department:

- Undergraduate thesis: Quantum random walk search on satisfiability problems
- Math senior conference paper: Classification of completely positive maps