6 papers · 1 filter
Nonlinear Diamagnetic Interactions in Ultrastrongly Coupled 2D Electrons
Dasom Kim, Kiran M. Kulkarni, Vaibhav Sharma +15
The quantum Hopfield model is widely used to describe ultrastrong light--matter coupling between cavity photons and collective bosonic excitations in solids, where the diamagnetic…
Matrix Product State Theory of Few-Photon Squeezed Pulses Interacting with a Two-Level Emitter in a Waveguide
Sofia Arranz Regidor, Matthew Kozma, Stephen Hughes
Squeezed light states have a special place in quantum optics with potentially profound applications in emerging quantum technologies. We present a numerically-exact matrix product…
Pulsed two-photon scattering from a single atom in a waveguide with delay-modified temporal correlations
Matthew Kozma, Sofia Arranz Regidor, Stephen Hughes
Quantum nonlinearity is an essential ingredient for many quantum technologies, but often the nonlinearity is too weak to be exploited at the few-photon level. However, few photons…
QwaveMPS: An efficient open-source Python package for simulating non-Markovian waveguide-QED using matrix product states
Sofia Arranz Regidor, Matthew Kozma, Stephen Hughes
QwaveMPS is an open-source Python library for simulating one-dimensional quantum many-body waveguide systems using matrix product states (MPS). It provides a user-friendly interfac…
Theory and simulations of few-photon Fock state pulses strongly interacting with a single qubit in a waveguide: exact population dynamics and time-dependent spectra
Sofia Arranz Regidor, Andreas Knorr, Stephen Hughes
We present a detailed quantum theory and simulations of a few-photon Fock state pulse interacting with a two-level system (TLS) in a waveguide. For a rectangular pulse shape, we pr…
Dynamical spectra from one and two-photon Fock state pulses exciting a single chiral qubit in a waveguide
Sofia Arranz Regidor, Andreas Knorr, Stephen Hughes
We study the dynamical light emission from few-photon Fock states in waveguide-QED with a chiral two-level system. We first investigate the time dynamics of the system by calculati…