18 citations · 59 across the 8 of their papers we have counts for
6 papers · 1 filter
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…
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…
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…