6 papers
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…
Decoherence in Waveguide Quantum Electrodynamics using Matrix Product States
Matias Bundgaard-Nielsen, Matthew Kozma, Sofia Arranz Regidor +1
We present a matrix product state (MPS) method for including decoherence processes in calculations involving waveguide quantum electrodynamics (waveguide QED) using density matrice…
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…
Quantum dynamics of few-photon pulsed waveguide-QED with a single artificial atom: frequency-dependent scattering theory and time-dependent matrix product states
Sofia Arranz Regidor, Matthew Kozma, Stephen Hughes
We present a quantum dynamical study of pulsed few-photon scattering from a single artificial atom, consisting of a two-level system (TLS) or qubit, in a waveguide QED system, dire…
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 of multi-qubit superradiance in a waveguide in the presence of finite delay times
Sofia Arranz Regidor, Franco Nori, Stephen Hughes
We study the quantum dynamics of multiple two-level atoms (qubits) in a waveguide quantum electrodynamics system, with a focus on modified superradiance effects between two or four…