78 citations · 489 across the 20 of their papers we have counts for
12 papers · 1 filter
Polarization dynamics of the spin-boson model in the shifted boson Hilbert space
Yang Zhao, Lipeng Chen
Faithfully simulating the dynamics of open quantum systems requires efficiently addressing the challenge of an infinite Hilbert space. Inspired by the shifted boson operator techni…
Multiphoton resonance band and Bloch-Siegert shift in a bichromatically driven qubit
Yiying Yan, Zhiguo Lü, Lipeng Chen +1
We study the resonance and dynamics of a qubit exposed to a strong aperiodic bichromatic field by using a periodic counter-rotating hybridized rotating wave (CHRW) Hamiltonian, whi…
Emission spectral non-Markovianity in qubit-cavity systems in the ultrastrong coupling regime
Chenyi Zhang, Minghong Yu, Yiying Yan +3
We study the emission spectra of dissipative Rabi and Jaynes-Cummings models in the non-Markovian and ultrastrong coupling regimes. We have derived a polaron-transformed Nakajima-Z…
Lamb Shift and the Vacuum Rabi Splitting in a Strongly Dissipative Environment
Yiying Yan, Tadele T. Ergogo, Zhiguo Lü +3
We study the vacuum Rabi splitting of a qubit ultrastrongly coupled to a high- cavity mode and a radiation reservoir. Three methods are employed: a numerically exact variational…
Simulating optical linear absorption for mesoscale molecular aggregates: an adaptive hierarchy of pure states approach
Tarun Gera, Lipeng Chen, Alex Eisfeld +3
In this paper, we present a new method for calculating linear absorption spectra for large molecular aggregates, called dyadic adaptive HOPS (DadHOPS). This method combines the ada…
Calculating non-linear response functions for multi-dimensional electronic spectroscopy using dyadic non-Markovian quantum state diffusion
Lipeng Chen, Doran I. G. Bennett, Alexander Eisfeld
We present a methodology for simulating multi-dimensional electronic spectra of molecular aggregates with coupling of electronic excitation to a structured environment using the st…
Excitations of Quantum Many-Body Systems via Purified Ensembles: A Unitary-Coupled-Cluster-based Approach
Carlos L. Benavides-Riveros, Lipeng Chen, Christian Schilling +2
State-average calculations based on mixture of states are increasingly being exploited across chemistry and physics as versatile procedures for addressing excitations of quantum ma…
Simulation of absorption spectra of molecular aggregates: a Hierarchy of Stochastic Pure States approach
Lipeng Chen, Doran I. G. Bennett, Alexander Eisfeld
The simulation of spectroscopic observables for molecular aggregates with strong and structured coupling of electronic excitation to vibrational degrees of freedom is an important…
Variational approach to time-dependent fluorescence of a driven qubit
Yiying Yan, Lipeng Chen, JunYan Luo +1
We employ the Dirac-Frenkel variational principle and multiple Davydov ansatz to study time-dependent fluorescence spectra of a driven qubit in the weak- to strong qubit-reservoir…
Transient dynamics of a one-dimensional Holstein polaron under the influence of an external electric field
Zhongkai Huang, Lipeng Chen, Nengji Zhou +1
Following the Dirac-Frenkel time-dependent variational principle, transient dynamics of a one-dimensional Holstein polaron with diagonal and off-diagonal exciton-phonon coupling in…
Finite-temperature time-dependent variation with multiple Davydov states
Lu Wang, Yuta Fujihashi, Lipeng Chen +1
The Dirac-Frenkel time-dependent variational approach with Davydov Ansätze is a sophisticated, yet efficient technique to obtain an acuurate solution to many-body Schrödinger equat…
Variational dynamics of the sub-Ohmic spin-boson model on the basis of multiple Davydov states
Lu Wang, Lipeng Chen, Nengji Zhou +1
Dynamics of the sub-Ohmic spin-boson model is investigated by employing a multitude of the Davydov D trial states, also known as the multi-D Ansatz. Accuracy in dynamics si…