18 citations · 59 across the 8 of their papers we have counts for
10 papers
Normal-ordered perturbative expansion for matter systems interacting with continuous-mode quantum photon fields
Liwen Ko, Robert L. Cook, K. Birgitta Whaley
We develop a normal-ordered perturbative expansion method to compute the reduced dynamics of a matter system interacting with a general continuous-mode photon field state. In this…
Input-output formulation of quantum light spectroscopy
Liwen Ko, Robert L. Cook, K. Birgitta Whaley
We develop an input-output formulation of quantum light spectroscopy (QLS) by combining the input-output theory, commonly used in quantum optics, with the perturbative expansion me…
First-Principles Nonadiabatic Dynamics via the Multi-Orbital Anderson-Newns Model
Liwen Ko, Joonho Lee
We develop a first-principles theory for nonadiabatic surface dynamics, providing a fit-free connection between density functional theory (DFT) calculations and the effective multi…
Optimal sensing on an asymmetric exceptional surface
Robert L. Cook, Liwen Ko, K. Birgitta Whaley
We study the connection between exceptional points (EPs) and optimal parameter estimation, in a simple system consisting of two counter-propagating traveling wave modes in a micror…
An efficient quantum algorithm for generation of ab initio n-th order susceptibilities for non-linear spectroscopies
Tyler Kharazi, Torin F. Stetina, Liwen Ko +2
We develop and analyze a fault-tolerant quantum algorithm for computing -th order response properties necessary for analysis of non-linear spectroscopies of molecular and conden…
Performing quantum entangled biphoton spectroscopy using classical light pulses
Liwen Ko, Robert L. Cook, K. Birgitta Whaley
We show that for a class of quantum light spectroscopy (QLS) experiments using n = 0,1,2, classical light pulses and an entangled photon pair (a biphoton state) where one p…
Dynamics of photosynthetic light harvesting systems interacting with N-photon Fock states
Liwen Ko, Robert L. Cook, K. Birgitta Whaley
We develop a method to simulate the excitonic dynamics of realistic photosynthetic light harvesting systems including non-Markovian coupling to phonon degrees of freedom, under exc…
A Quantum trajectory picture of single photon absorption and energy transport in photosystem II
Robert L. Cook, Liwen Ko, K. Birgitta Whaley
In this work we study the first step in photosynthesis for the limiting case of a single photon interacting with photosystem II (PSII). We model our system using quantum trajectory…
Interplay of vibration- and environment-assisted energy transfer
Zeng-Zhao Li, Liwen Ko, Zhibo Yang +2
We study the interplay between two environmental influences on excited state energy transfer in photosynthetic light harvesting complexes, namely, vibrationally assisted energy tra…
Unraveling excitation energy transfer assisted by collective behaviors of vibrations
Zeng-Zhao Li, Liwen Ko, Zhibo Yang +2
We investigate how collective behaviors of vibrations such as cooperativity and interference can enhance energy transfer in a nontrivial way, focusing on an example of a donor-brid…